203136e793
Summary: PR to fix this issue -> https://github.com/facebook/rocksdb/issues/1926 Closes https://github.com/facebook/rocksdb/pull/1965 Differential Revision: D4682411 Pulled By: siying fbshipit-source-id: a519be1
2531 lines
77 KiB
C++
2531 lines
77 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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// This file is designed for caching those frequently used IDs and provide
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// efficient portal (i.e, a set of static functions) to access java code
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// from c++.
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#ifndef JAVA_ROCKSJNI_PORTAL_H_
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#define JAVA_ROCKSJNI_PORTAL_H_
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#include <jni.h>
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#include <functional>
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#include <iostream>
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#include <limits>
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#include <string>
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#include <vector>
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#include "rocksdb/db.h"
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#include "rocksdb/filter_policy.h"
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#include "rocksdb/status.h"
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#include "rocksdb/utilities/backupable_db.h"
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#include "rocksdb/utilities/write_batch_with_index.h"
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#include "rocksjni/comparatorjnicallback.h"
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#include "rocksjni/loggerjnicallback.h"
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#include "rocksjni/writebatchhandlerjnicallback.h"
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// Remove macro on windows
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#ifdef DELETE
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#undef DELETE
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#endif
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namespace rocksdb {
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// Detect if jlong overflows size_t
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inline Status check_if_jlong_fits_size_t(const jlong& jvalue) {
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Status s = Status::OK();
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if (static_cast<uint64_t>(jvalue) > std::numeric_limits<size_t>::max()) {
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s = Status::InvalidArgument(Slice("jlong overflows 32 bit value."));
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}
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return s;
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}
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class JavaClass {
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public:
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/**
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* Gets and initializes a Java Class
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*
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* @param env A pointer to the Java environment
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* @param jclazz_name The fully qualified JNI name of the Java Class
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* e.g. "java/lang/String"
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*
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* @return The Java Class or nullptr if one of the
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* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
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* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
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*/
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static jclass getJClass(JNIEnv* env, const char* jclazz_name) {
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jclass jclazz = env->FindClass(jclazz_name);
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assert(jclazz != nullptr);
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return jclazz;
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}
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};
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// Native class template
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template<class PTR, class DERIVED> class RocksDBNativeClass : public JavaClass {
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};
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// Native class template for sub-classes of RocksMutableObject
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template<class PTR, class DERIVED> class NativeRocksMutableObject
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: public RocksDBNativeClass<PTR, DERIVED> {
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public:
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/**
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* Gets the Java Method ID for the
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* RocksMutableObject#setNativeHandle(long, boolean) method
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*
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* @param env A pointer to the Java environment
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* @return The Java Method ID or nullptr the RocksMutableObject class cannot
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* be accessed, or if one of the NoSuchMethodError,
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* ExceptionInInitializerError or OutOfMemoryError exceptions is thrown
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*/
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static jmethodID getSetNativeHandleMethod(JNIEnv* env) {
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static jclass jclazz = DERIVED::getJClass(env);
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if(jclazz == nullptr) {
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return nullptr;
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}
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static jmethodID mid = env->GetMethodID(
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jclazz, "setNativeHandle", "(JZ)V");
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assert(mid != nullptr);
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return mid;
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}
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/**
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* Sets the C++ object pointer handle in the Java object
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*
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* @param env A pointer to the Java environment
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* @param jobj The Java object on which to set the pointer handle
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* @param ptr The C++ object pointer
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* @param java_owns_handle JNI_TRUE if ownership of the C++ object is
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* managed by the Java object
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*
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* @return true if a Java exception is pending, false otherwise
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*/
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static bool setHandle(JNIEnv* env, jobject jobj, PTR ptr,
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jboolean java_owns_handle) {
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assert(jobj != nullptr);
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static jmethodID mid = getSetNativeHandleMethod(env);
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if(mid == nullptr) {
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return true; // signal exception
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}
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env->CallVoidMethod(jobj, mid, reinterpret_cast<jlong>(ptr), java_owns_handle);
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if(env->ExceptionCheck()) {
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return true; // signal exception
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}
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return false;
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}
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};
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// Java Exception template
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template<class DERIVED> class JavaException : public JavaClass {
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public:
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/**
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* Create and throw a java exception with the provided message
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*
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* @param env A pointer to the Java environment
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* @param msg The message for the exception
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*
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* @return true if an exception was thrown, false otherwise
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*/
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static bool ThrowNew(JNIEnv* env, const std::string& msg) {
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jclass jclazz = DERIVED::getJClass(env);
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if(jclazz == nullptr) {
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// exception occurred accessing class
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std::cerr << "JavaException::ThrowNew - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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const jint rs = env->ThrowNew(jclazz, msg.c_str());
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if(rs != JNI_OK) {
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// exception could not be thrown
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std::cerr << "JavaException::ThrowNew - Fatal: could not throw exception!" << std::endl;
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return env->ExceptionCheck();
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}
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return true;
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}
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};
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// The portal class for org.rocksdb.RocksDB
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class RocksDBJni : public RocksDBNativeClass<rocksdb::DB*, RocksDBJni> {
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public:
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/**
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* Get the Java Class org.rocksdb.RocksDB
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*
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* @param env A pointer to the Java environment
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*
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* @return The Java Class or nullptr if one of the
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* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
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* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
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*/
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static jclass getJClass(JNIEnv* env) {
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return RocksDBNativeClass::getJClass(env, "org/rocksdb/RocksDB");
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}
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};
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// The portal class for org.rocksdb.Status
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class StatusJni : public RocksDBNativeClass<rocksdb::Status*, StatusJni> {
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public:
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/**
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* Get the Java Class org.rocksdb.Status
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*
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* @param env A pointer to the Java environment
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*
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* @return The Java Class or nullptr if one of the
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* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
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* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
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*/
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static jclass getJClass(JNIEnv* env) {
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return RocksDBNativeClass::getJClass(env, "org/rocksdb/Status");
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}
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/**
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* Create a new Java org.rocksdb.Status object with the same properties as
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* the provided C++ rocksdb::Status object
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*
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* @param env A pointer to the Java environment
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* @param status The rocksdb::Status object
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*
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* @return A reference to a Java org.rocksdb.Status object, or nullptr
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* if an an exception occurs
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*/
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static jobject construct(JNIEnv* env, const Status& status) {
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jclass jclazz = getJClass(env);
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if(jclazz == nullptr) {
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// exception occurred accessing class
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return nullptr;
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}
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jmethodID mid =
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env->GetMethodID(jclazz, "<init>", "(BBLjava/lang/String;)V");
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if(mid == nullptr) {
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// exception thrown: NoSuchMethodException or OutOfMemoryError
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return nullptr;
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}
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// convert the Status state for Java
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jstring jstate = nullptr;
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if (status.getState() != nullptr) {
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const char* const state = status.getState();
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jstate = env->NewStringUTF(state);
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if(env->ExceptionCheck()) {
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if(jstate != nullptr) {
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env->DeleteLocalRef(jstate);
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}
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return nullptr;
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}
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}
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jobject jstatus =
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env->NewObject(jclazz, mid, toJavaStatusCode(status.code()),
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toJavaStatusSubCode(status.subcode()), jstate);
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if(env->ExceptionCheck()) {
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// exception occurred
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if(jstate != nullptr) {
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env->DeleteLocalRef(jstate);
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}
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return nullptr;
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}
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if(jstate != nullptr) {
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env->DeleteLocalRef(jstate);
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}
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return jstatus;
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}
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// Returns the equivalent org.rocksdb.Status.Code for the provided
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// C++ rocksdb::Status::Code enum
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static jbyte toJavaStatusCode(const rocksdb::Status::Code& code) {
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switch (code) {
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case rocksdb::Status::Code::kOk:
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return 0x0;
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case rocksdb::Status::Code::kNotFound:
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return 0x1;
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case rocksdb::Status::Code::kCorruption:
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return 0x2;
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case rocksdb::Status::Code::kNotSupported:
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return 0x3;
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case rocksdb::Status::Code::kInvalidArgument:
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return 0x4;
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case rocksdb::Status::Code::kIOError:
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return 0x5;
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case rocksdb::Status::Code::kMergeInProgress:
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return 0x6;
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case rocksdb::Status::Code::kIncomplete:
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return 0x7;
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case rocksdb::Status::Code::kShutdownInProgress:
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return 0x8;
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case rocksdb::Status::Code::kTimedOut:
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return 0x9;
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case rocksdb::Status::Code::kAborted:
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return 0xA;
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case rocksdb::Status::Code::kBusy:
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return 0xB;
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case rocksdb::Status::Code::kExpired:
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return 0xC;
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case rocksdb::Status::Code::kTryAgain:
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return 0xD;
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default:
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return 0x7F; // undefined
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}
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}
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// Returns the equivalent org.rocksdb.Status.SubCode for the provided
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// C++ rocksdb::Status::SubCode enum
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static jbyte toJavaStatusSubCode(const rocksdb::Status::SubCode& subCode) {
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switch (subCode) {
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case rocksdb::Status::SubCode::kNone:
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return 0x0;
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case rocksdb::Status::SubCode::kMutexTimeout:
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return 0x1;
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case rocksdb::Status::SubCode::kLockTimeout:
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return 0x2;
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case rocksdb::Status::SubCode::kLockLimit:
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return 0x3;
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case rocksdb::Status::SubCode::kMaxSubCode:
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return 0x7E;
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default:
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return 0x7F; // undefined
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}
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}
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};
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// The portal class for org.rocksdb.RocksDBException
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class RocksDBExceptionJni :
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public JavaException<RocksDBExceptionJni> {
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public:
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/**
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* Get the Java Class org.rocksdb.RocksDBException
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*
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* @param env A pointer to the Java environment
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*
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* @return The Java Class or nullptr if one of the
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* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
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* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
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*/
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static jclass getJClass(JNIEnv* env) {
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return JavaException::getJClass(env, "org/rocksdb/RocksDBException");
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}
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/**
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* Create and throw a Java RocksDBException with the provided message
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*
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* @param env A pointer to the Java environment
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* @param msg The message for the exception
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*
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* @return true if an exception was thrown, false otherwise
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*/
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static bool ThrowNew(JNIEnv* env, const std::string& msg) {
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return JavaException::ThrowNew(env, msg);
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}
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/**
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* Create and throw a Java RocksDBException with the provided status
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*
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* If s.ok() == true, then this function will not throw any exception.
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*
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* @param env A pointer to the Java environment
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* @param s The status for the exception
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*
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* @return true if an exception was thrown, false otherwise
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*/
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static bool ThrowNew(JNIEnv* env, const Status& s) {
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assert(!s.ok());
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if (s.ok()) {
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return false;
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}
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// get the RocksDBException class
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jclass jclazz = getJClass(env);
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if(jclazz == nullptr) {
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// exception occurred accessing class
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std::cerr << "RocksDBExceptionJni::ThrowNew/class - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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// get the constructor of org.rocksdb.RocksDBException
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jmethodID mid =
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env->GetMethodID(jclazz, "<init>", "(Lorg/rocksdb/Status;)V");
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if(mid == nullptr) {
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// exception thrown: NoSuchMethodException or OutOfMemoryError
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std::cerr << "RocksDBExceptionJni::ThrowNew/cstr - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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// get the Java status object
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jobject jstatus = StatusJni::construct(env, s);
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if(jstatus == nullptr) {
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// exception occcurred
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std::cerr << "RocksDBExceptionJni::ThrowNew/StatusJni - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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// construct the RocksDBException
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jthrowable rocksdb_exception = reinterpret_cast<jthrowable>(env->NewObject(jclazz, mid, jstatus));
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if(env->ExceptionCheck()) {
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if(jstatus != nullptr) {
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env->DeleteLocalRef(jstatus);
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}
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if(rocksdb_exception != nullptr) {
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env->DeleteLocalRef(rocksdb_exception);
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}
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std::cerr << "RocksDBExceptionJni::ThrowNew/NewObject - Error: unexpected exception!" << std::endl;
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return true;
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}
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// throw the RocksDBException
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const jint rs = env->Throw(rocksdb_exception);
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if(rs != JNI_OK) {
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// exception could not be thrown
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std::cerr << "RocksDBExceptionJni::ThrowNew - Fatal: could not throw exception!" << std::endl;
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if(jstatus != nullptr) {
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env->DeleteLocalRef(jstatus);
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}
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if(rocksdb_exception != nullptr) {
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env->DeleteLocalRef(rocksdb_exception);
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}
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return env->ExceptionCheck();
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}
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if(jstatus != nullptr) {
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env->DeleteLocalRef(jstatus);
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}
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if(rocksdb_exception != nullptr) {
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env->DeleteLocalRef(rocksdb_exception);
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}
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return true;
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}
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/**
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* Create and throw a Java RocksDBException with the provided message
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* and status
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*
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* If s.ok() == true, then this function will not throw any exception.
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*
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* @param env A pointer to the Java environment
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* @param msg The message for the exception
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* @param s The status for the exception
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*
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* @return true if an exception was thrown, false otherwise
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*/
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static bool ThrowNew(JNIEnv* env, const std::string& msg, const Status& s) {
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assert(!s.ok());
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if (s.ok()) {
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return false;
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}
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// get the RocksDBException class
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jclass jclazz = getJClass(env);
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if(jclazz == nullptr) {
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// exception occurred accessing class
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std::cerr << "RocksDBExceptionJni::ThrowNew/class - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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// get the constructor of org.rocksdb.RocksDBException
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jmethodID mid =
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env->GetMethodID(jclazz, "<init>", "(Ljava/lang/String;Lorg/rocksdb/Status;)V");
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if(mid == nullptr) {
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// exception thrown: NoSuchMethodException or OutOfMemoryError
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std::cerr << "RocksDBExceptionJni::ThrowNew/cstr - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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jstring jmsg = env->NewStringUTF(msg.c_str());
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if(jmsg == nullptr) {
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// exception thrown: OutOfMemoryError
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std::cerr << "RocksDBExceptionJni::ThrowNew/msg - Error: unexpected exception!" << std::endl;
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return env->ExceptionCheck();
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}
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// get the Java status object
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jobject jstatus = StatusJni::construct(env, s);
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if(jstatus == nullptr) {
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// exception occcurred
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std::cerr << "RocksDBExceptionJni::ThrowNew/StatusJni - Error: unexpected exception!" << std::endl;
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if(jmsg != nullptr) {
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env->DeleteLocalRef(jmsg);
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}
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return env->ExceptionCheck();
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}
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// construct the RocksDBException
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jthrowable rocksdb_exception = reinterpret_cast<jthrowable>(env->NewObject(jclazz, mid, jmsg, jstatus));
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if(env->ExceptionCheck()) {
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if(jstatus != nullptr) {
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env->DeleteLocalRef(jstatus);
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}
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if(jmsg != nullptr) {
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env->DeleteLocalRef(jmsg);
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}
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if(rocksdb_exception != nullptr) {
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env->DeleteLocalRef(rocksdb_exception);
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}
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std::cerr << "RocksDBExceptionJni::ThrowNew/NewObject - Error: unexpected exception!" << std::endl;
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return true;
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}
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// throw the RocksDBException
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const jint rs = env->Throw(rocksdb_exception);
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if(rs != JNI_OK) {
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// exception could not be thrown
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std::cerr << "RocksDBExceptionJni::ThrowNew - Fatal: could not throw exception!" << std::endl;
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if(jstatus != nullptr) {
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env->DeleteLocalRef(jstatus);
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}
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if(jmsg != nullptr) {
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env->DeleteLocalRef(jmsg);
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}
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if(rocksdb_exception != nullptr) {
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env->DeleteLocalRef(rocksdb_exception);
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}
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return env->ExceptionCheck();
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}
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if(jstatus != nullptr) {
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env->DeleteLocalRef(jstatus);
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}
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if(jmsg != nullptr) {
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env->DeleteLocalRef(jmsg);
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}
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if(rocksdb_exception != nullptr) {
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env->DeleteLocalRef(rocksdb_exception);
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}
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return true;
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}
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};
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// The portal class for java.lang.IllegalArgumentException
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class IllegalArgumentExceptionJni :
|
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public JavaException<IllegalArgumentExceptionJni> {
|
|
public:
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|
/**
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|
* Get the Java Class java.lang.IllegalArgumentException
|
|
*
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|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaException::getJClass(env, "java/lang/IllegalArgumentException");
|
|
}
|
|
|
|
/**
|
|
* Create and throw a Java IllegalArgumentException with the provided status
|
|
*
|
|
* If s.ok() == true, then this function will not throw any exception.
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param s The status for the exception
|
|
*
|
|
* @return true if an exception was thrown, false otherwise
|
|
*/
|
|
static bool ThrowNew(JNIEnv* env, const Status& s) {
|
|
assert(!s.ok());
|
|
if (s.ok()) {
|
|
return false;
|
|
}
|
|
|
|
// get the IllegalArgumentException class
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
std::cerr << "IllegalArgumentExceptionJni::ThrowNew/class - Error: unexpected exception!" << std::endl;
|
|
return env->ExceptionCheck();
|
|
}
|
|
|
|
return JavaException::ThrowNew(env, s.ToString());
|
|
}
|
|
};
|
|
|
|
|
|
// The portal class for org.rocksdb.Options
|
|
class OptionsJni : public RocksDBNativeClass<
|
|
rocksdb::Options*, OptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.Options
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/Options");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.DBOptions
|
|
class DBOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::DBOptions*, DBOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.DBOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/DBOptions");
|
|
}
|
|
};
|
|
|
|
class ColumnFamilyDescriptorJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.ColumnFamilyDescriptor
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/ColumnFamilyDescriptor");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: ColumnFamilyDescriptor#columnFamilyName
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getColumnFamilyNameMethod(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "columnFamilyName", "()[B");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: ColumnFamilyDescriptor#columnFamilyOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getColumnFamilyOptionsMethod(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "columnFamilyOptions",
|
|
"()Lorg/rocksdb/ColumnFamilyOptions;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.ColumnFamilyOptions
|
|
class ColumnFamilyOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::ColumnFamilyOptions*, ColumnFamilyOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.ColumnFamilyOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env,
|
|
"org/rocksdb/ColumnFamilyOptions");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WriteOptions
|
|
class WriteOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::WriteOptions*, WriteOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WriteOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/WriteOptions");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.ReadOptions
|
|
class ReadOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::ReadOptions*, ReadOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.ReadOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/ReadOptions");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WriteBatch
|
|
class WriteBatchJni : public RocksDBNativeClass<
|
|
rocksdb::WriteBatch*, WriteBatchJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WriteBatch
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/WriteBatch");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WriteBatch.Handler
|
|
class WriteBatchHandlerJni : public RocksDBNativeClass<
|
|
const rocksdb::WriteBatchHandlerJniCallback*,
|
|
WriteBatchHandlerJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WriteBatch.Handler
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env,
|
|
"org/rocksdb/WriteBatch$Handler");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: WriteBatch.Handler#put
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getPutMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "put", "([B[B)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: WriteBatch.Handler#merge
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getMergeMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "merge", "([B[B)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: WriteBatch.Handler#delete
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getDeleteMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "delete", "([B)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: WriteBatch.Handler#deleteRange
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getDeleteRangeMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if (jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "deleteRange", "([B[B)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: WriteBatch.Handler#logData
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getLogDataMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "logData", "([B)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: WriteBatch.Handler#shouldContinue
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getContinueMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "shouldContinue", "()Z");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WriteBatchWithIndex
|
|
class WriteBatchWithIndexJni : public RocksDBNativeClass<
|
|
rocksdb::WriteBatchWithIndex*, WriteBatchWithIndexJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WriteBatchWithIndex
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env,
|
|
"org/rocksdb/WriteBatchWithIndex");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.HistogramData
|
|
class HistogramDataJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.HistogramData
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/HistogramData");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: HistogramData constructor
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getConstructorMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "<init>", "(DDDDD)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.BackupableDBOptions
|
|
class BackupableDBOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::BackupableDBOptions*, BackupableDBOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.BackupableDBOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env,
|
|
"org/rocksdb/BackupableDBOptions");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.BackupEngine
|
|
class BackupEngineJni : public RocksDBNativeClass<
|
|
rocksdb::BackupEngine*, BackupEngineJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.BackupableEngine
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/BackupEngine");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.RocksIterator
|
|
class IteratorJni : public RocksDBNativeClass<
|
|
rocksdb::Iterator*, IteratorJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.RocksIterator
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/RocksIterator");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.Filter
|
|
class FilterJni : public RocksDBNativeClass<
|
|
std::shared_ptr<rocksdb::FilterPolicy>*, FilterJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.Filter
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/Filter");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.ColumnFamilyHandle
|
|
class ColumnFamilyHandleJni : public RocksDBNativeClass<
|
|
rocksdb::ColumnFamilyHandle*, ColumnFamilyHandleJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.ColumnFamilyHandle
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env,
|
|
"org/rocksdb/ColumnFamilyHandle");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.FlushOptions
|
|
class FlushOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::FlushOptions*, FlushOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.FlushOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/FlushOptions");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.ComparatorOptions
|
|
class ComparatorOptionsJni : public RocksDBNativeClass<
|
|
rocksdb::ComparatorJniCallbackOptions*, ComparatorOptionsJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.ComparatorOptions
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/ComparatorOptions");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.AbstractComparator
|
|
class AbstractComparatorJni : public RocksDBNativeClass<
|
|
const rocksdb::BaseComparatorJniCallback*,
|
|
AbstractComparatorJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.AbstractComparator
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env,
|
|
"org/rocksdb/AbstractComparator");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Comparator#name
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getNameMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "name", "()Ljava/lang/String;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Comparator#compare
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getCompareMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "compare",
|
|
"(Lorg/rocksdb/AbstractSlice;Lorg/rocksdb/AbstractSlice;)I");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Comparator#findShortestSeparator
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getFindShortestSeparatorMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "findShortestSeparator",
|
|
"(Ljava/lang/String;Lorg/rocksdb/AbstractSlice;)Ljava/lang/String;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Comparator#findShortSuccessor
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getFindShortSuccessorMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "findShortSuccessor",
|
|
"(Ljava/lang/String;)Ljava/lang/String;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.AbstractSlice
|
|
class AbstractSliceJni : public NativeRocksMutableObject<
|
|
const rocksdb::Slice*, AbstractSliceJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.AbstractSlice
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/AbstractSlice");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.Slice
|
|
class SliceJni : public NativeRocksMutableObject<
|
|
const rocksdb::Slice*, AbstractSliceJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.Slice
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/Slice");
|
|
}
|
|
|
|
/**
|
|
* Constructs a Slice object
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to a Java Slice object, or a nullptr if an
|
|
* exception occurs
|
|
*/
|
|
static jobject construct0(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "<init>", "()V");
|
|
if(mid == nullptr) {
|
|
// exception occurred accessing method
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jslice = env->NewObject(jclazz, mid);
|
|
if(env->ExceptionCheck()) {
|
|
return nullptr;
|
|
}
|
|
|
|
return jslice;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.DirectSlice
|
|
class DirectSliceJni : public NativeRocksMutableObject<
|
|
const rocksdb::Slice*, AbstractSliceJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.DirectSlice
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/DirectSlice");
|
|
}
|
|
|
|
/**
|
|
* Constructs a DirectSlice object
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to a Java DirectSlice object, or a nullptr if an
|
|
* exception occurs
|
|
*/
|
|
static jobject construct0(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "<init>", "()V");
|
|
if(mid == nullptr) {
|
|
// exception occurred accessing method
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jdirect_slice = env->NewObject(jclazz, mid);
|
|
if(env->ExceptionCheck()) {
|
|
return nullptr;
|
|
}
|
|
|
|
return jdirect_slice;
|
|
}
|
|
};
|
|
|
|
// The portal class for java.util.List
|
|
class ListJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class java.util.List
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getListClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "java/util/List");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Class java.util.ArrayList
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getArrayListClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "java/util/ArrayList");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Class java.util.Iterator
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getIteratorClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "java/util/Iterator");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: List#iterator
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getIteratorMethod(JNIEnv* env) {
|
|
jclass jlist_clazz = getListClass(env);
|
|
if(jlist_clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jlist_clazz, "iterator", "()Ljava/util/Iterator;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Iterator#hasNext
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getHasNextMethod(JNIEnv* env) {
|
|
jclass jiterator_clazz = getIteratorClass(env);
|
|
if(jiterator_clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jiterator_clazz, "hasNext", "()Z");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Iterator#next
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getNextMethod(JNIEnv* env) {
|
|
jclass jiterator_clazz = getIteratorClass(env);
|
|
if(jiterator_clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jiterator_clazz, "next", "()Ljava/lang/Object;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: ArrayList constructor
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getArrayListConstructorMethodId(JNIEnv* env) {
|
|
jclass jarray_list_clazz = getArrayListClass(env);
|
|
if(jarray_list_clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
static jmethodID mid =
|
|
env->GetMethodID(jarray_list_clazz, "<init>", "(I)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: List#add
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getListAddMethodId(JNIEnv* env) {
|
|
jclass jlist_clazz = getListClass(env);
|
|
if(jlist_clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jlist_clazz, "add", "(Ljava/lang/Object;)Z");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for java.lang.Byte
|
|
class ByteJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class java.lang.Byte
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "java/lang/Byte");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Class byte[]
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getArrayJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "[B");
|
|
}
|
|
|
|
/**
|
|
* Creates a new 2-dimensional Java Byte Array byte[][]
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param len The size of the first dimension
|
|
*
|
|
* @return A reference to the Java byte[][] or nullptr if an exception occurs
|
|
*/
|
|
static jobjectArray new2dByteArray(JNIEnv* env, const jsize len) {
|
|
jclass clazz = getArrayJClass(env);
|
|
if(clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
return env->NewObjectArray(len, clazz, nullptr);
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Byte#byteValue
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getByteValueMethod(JNIEnv* env) {
|
|
jclass clazz = getJClass(env);
|
|
if(clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(clazz, "byteValue", "()B");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for java.lang.StringBuilder
|
|
class StringBuilderJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class java.lang.StringBuilder
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "java/lang/StringBuilder");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: StringBuilder#append
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getListAddMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "append",
|
|
"(Ljava/lang/String;)Ljava/lang/StringBuilder;");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
|
|
/**
|
|
* Appends a C-style string to a StringBuilder
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param jstring_builder Reference to a java.lang.StringBuilder
|
|
* @param c_str A C-style string to append to the StringBuilder
|
|
*
|
|
* @return A reference to the updated StringBuilder, or a nullptr if
|
|
* an exception occurs
|
|
*/
|
|
static jobject append(JNIEnv* env, jobject jstring_builder,
|
|
const char* c_str) {
|
|
jmethodID mid = getListAddMethodId(env);
|
|
if(mid == nullptr) {
|
|
// exception occurred accessing class or method
|
|
return nullptr;
|
|
}
|
|
|
|
jstring new_value_str = env->NewStringUTF(c_str);
|
|
if(new_value_str == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jresult_string_builder =
|
|
env->CallObjectMethod(jstring_builder, mid, new_value_str);
|
|
if(env->ExceptionCheck()) {
|
|
// exception occurred
|
|
env->DeleteLocalRef(new_value_str);
|
|
return nullptr;
|
|
}
|
|
|
|
return jresult_string_builder;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.BackupInfo
|
|
class BackupInfoJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.BackupInfo
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/BackupInfo");
|
|
}
|
|
|
|
/**
|
|
* Constructs a BackupInfo object
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param backup_id id of the backup
|
|
* @param timestamp timestamp of the backup
|
|
* @param size size of the backup
|
|
* @param number_files number of files related to the backup
|
|
*
|
|
* @return A reference to a Java BackupInfo object, or a nullptr if an
|
|
* exception occurs
|
|
*/
|
|
static jobject construct0(JNIEnv* env, uint32_t backup_id, int64_t timestamp,
|
|
uint64_t size, uint32_t number_files) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid = env->GetMethodID(jclazz, "<init>", "(IJJI)V");
|
|
if(mid == nullptr) {
|
|
// exception occurred accessing method
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jbackup_info =
|
|
env->NewObject(jclazz, mid, backup_id, timestamp, size, number_files);
|
|
if(env->ExceptionCheck()) {
|
|
return nullptr;
|
|
}
|
|
|
|
return jbackup_info;
|
|
}
|
|
};
|
|
|
|
class BackupInfoListJni {
|
|
public:
|
|
/**
|
|
* Converts a C++ std::vector<BackupInfo> object to
|
|
* a Java ArrayList<org.rocksdb.BackupInfo> object
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param backup_infos A vector of BackupInfo
|
|
*
|
|
* @return Either a reference to a Java ArrayList object, or a nullptr
|
|
* if an exception occurs
|
|
*/
|
|
static jobject getBackupInfo(JNIEnv* env,
|
|
std::vector<BackupInfo> backup_infos) {
|
|
jclass jarray_list_clazz = rocksdb::ListJni::getArrayListClass(env);
|
|
if(jarray_list_clazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
jmethodID cstr_mid = rocksdb::ListJni::getArrayListConstructorMethodId(env);
|
|
if(cstr_mid == nullptr) {
|
|
// exception occurred accessing method
|
|
return nullptr;
|
|
}
|
|
|
|
jmethodID add_mid = rocksdb::ListJni::getListAddMethodId(env);
|
|
if(add_mid == nullptr) {
|
|
// exception occurred accessing method
|
|
return nullptr;
|
|
}
|
|
|
|
// create java list
|
|
jobject jbackup_info_handle_list =
|
|
env->NewObject(jarray_list_clazz, cstr_mid, backup_infos.size());
|
|
if(env->ExceptionCheck()) {
|
|
// exception occured constructing object
|
|
return nullptr;
|
|
}
|
|
|
|
// insert in java list
|
|
auto end = backup_infos.end();
|
|
for (auto it = backup_infos.begin(); it != end; ++it) {
|
|
auto backup_info = *it;
|
|
|
|
jobject obj = rocksdb::BackupInfoJni::construct0(env,
|
|
backup_info.backup_id,
|
|
backup_info.timestamp,
|
|
backup_info.size,
|
|
backup_info.number_files);
|
|
if(env->ExceptionCheck()) {
|
|
// exception occured constructing object
|
|
if(obj != nullptr) {
|
|
env->DeleteLocalRef(obj);
|
|
}
|
|
if(jbackup_info_handle_list != nullptr) {
|
|
env->DeleteLocalRef(jbackup_info_handle_list);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
jboolean rs =
|
|
env->CallBooleanMethod(jbackup_info_handle_list, add_mid, obj);
|
|
if(env->ExceptionCheck() || rs == JNI_FALSE) {
|
|
// exception occured calling method, or could not add
|
|
if(obj != nullptr) {
|
|
env->DeleteLocalRef(obj);
|
|
}
|
|
if(jbackup_info_handle_list != nullptr) {
|
|
env->DeleteLocalRef(jbackup_info_handle_list);
|
|
}
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
return jbackup_info_handle_list;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WBWIRocksIterator
|
|
class WBWIRocksIteratorJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WBWIRocksIterator
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/WBWIRocksIterator");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Field: WBWIRocksIterator#entry
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Field ID or nullptr if the class or field id could not
|
|
* be retieved
|
|
*/
|
|
static jfieldID getWriteEntryField(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jfieldID fid =
|
|
env->GetFieldID(jclazz, "entry",
|
|
"Lorg/rocksdb/WBWIRocksIterator$WriteEntry;");
|
|
assert(fid != nullptr);
|
|
return fid;
|
|
}
|
|
|
|
/**
|
|
* Gets the value of the WBWIRocksIterator#entry
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param jwbwi_rocks_iterator A reference to a WBWIIterator
|
|
*
|
|
* @return A reference to a Java WBWIRocksIterator.WriteEntry object, or
|
|
* a nullptr if an exception occurs
|
|
*/
|
|
static jobject getWriteEntry(JNIEnv* env, jobject jwbwi_rocks_iterator) {
|
|
assert(jwbwi_rocks_iterator != nullptr);
|
|
|
|
jfieldID jwrite_entry_field = getWriteEntryField(env);
|
|
if(jwrite_entry_field == nullptr) {
|
|
// exception occurred accessing the field
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jwe = env->GetObjectField(jwbwi_rocks_iterator, jwrite_entry_field);
|
|
assert(jwe != nullptr);
|
|
return jwe;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WBWIRocksIterator.WriteType
|
|
class WriteTypeJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the PUT enum field value of WBWIRocksIterator.WriteType
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject PUT(JNIEnv* env) {
|
|
return getEnum(env, "PUT");
|
|
}
|
|
|
|
/**
|
|
* Get the MERGE enum field value of WBWIRocksIterator.WriteType
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject MERGE(JNIEnv* env) {
|
|
return getEnum(env, "MERGE");
|
|
}
|
|
|
|
/**
|
|
* Get the DELETE enum field value of WBWIRocksIterator.WriteType
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject DELETE(JNIEnv* env) {
|
|
return getEnum(env, "DELETE");
|
|
}
|
|
|
|
/**
|
|
* Get the LOG enum field value of WBWIRocksIterator.WriteType
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject LOG(JNIEnv* env) {
|
|
return getEnum(env, "LOG");
|
|
}
|
|
|
|
private:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WBWIRocksIterator.WriteType
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/WBWIRocksIterator$WriteType");
|
|
}
|
|
|
|
/**
|
|
* Get an enum field of org.rocksdb.WBWIRocksIterator.WriteType
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param name The name of the enum field
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject getEnum(JNIEnv* env, const char name[]) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
jfieldID jfid =
|
|
env->GetStaticFieldID(jclazz, name,
|
|
"Lorg/rocksdb/WBWIRocksIterator$WriteType;");
|
|
if(env->ExceptionCheck()) {
|
|
// exception occured while getting field
|
|
return nullptr;
|
|
} else if(jfid == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jwrite_type = env->GetStaticObjectField(jclazz, jfid);
|
|
assert(jwrite_type != nullptr);
|
|
return jwrite_type;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.WBWIRocksIterator.WriteEntry
|
|
class WriteEntryJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.WBWIRocksIterator.WriteEntry
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/WBWIRocksIterator$WriteEntry");
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.InfoLogLevel
|
|
class InfoLogLevelJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the DEBUG_LEVEL enum field value of InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject DEBUG_LEVEL(JNIEnv* env) {
|
|
return getEnum(env, "DEBUG_LEVEL");
|
|
}
|
|
|
|
/**
|
|
* Get the INFO_LEVEL enum field value of InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject INFO_LEVEL(JNIEnv* env) {
|
|
return getEnum(env, "INFO_LEVEL");
|
|
}
|
|
|
|
/**
|
|
* Get the WARN_LEVEL enum field value of InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject WARN_LEVEL(JNIEnv* env) {
|
|
return getEnum(env, "WARN_LEVEL");
|
|
}
|
|
|
|
/**
|
|
* Get the ERROR_LEVEL enum field value of InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject ERROR_LEVEL(JNIEnv* env) {
|
|
return getEnum(env, "ERROR_LEVEL");
|
|
}
|
|
|
|
/**
|
|
* Get the FATAL_LEVEL enum field value of InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject FATAL_LEVEL(JNIEnv* env) {
|
|
return getEnum(env, "FATAL_LEVEL");
|
|
}
|
|
|
|
/**
|
|
* Get the HEADER_LEVEL enum field value of InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject HEADER_LEVEL(JNIEnv* env) {
|
|
return getEnum(env, "HEADER_LEVEL");
|
|
}
|
|
|
|
private:
|
|
/**
|
|
* Get the Java Class org.rocksdb.InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env, "org/rocksdb/InfoLogLevel");
|
|
}
|
|
|
|
/**
|
|
* Get an enum field of org.rocksdb.InfoLogLevel
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param name The name of the enum field
|
|
*
|
|
* @return A reference to the enum field value or a nullptr if
|
|
* the enum field value could not be retrieved
|
|
*/
|
|
static jobject getEnum(JNIEnv* env, const char name[]) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
jfieldID jfid =
|
|
env->GetStaticFieldID(jclazz, name, "Lorg/rocksdb/InfoLogLevel;");
|
|
if(env->ExceptionCheck()) {
|
|
// exception occured while getting field
|
|
return nullptr;
|
|
} else if(jfid == nullptr) {
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jinfo_log_level = env->GetStaticObjectField(jclazz, jfid);
|
|
assert(jinfo_log_level != nullptr);
|
|
return jinfo_log_level;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.Logger
|
|
class LoggerJni : public RocksDBNativeClass<
|
|
std::shared_ptr<rocksdb::LoggerJniCallback>*, LoggerJni> {
|
|
public:
|
|
/**
|
|
* Get the Java Class org/rocksdb/Logger
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return RocksDBNativeClass::getJClass(env, "org/rocksdb/Logger");
|
|
}
|
|
|
|
/**
|
|
* Get the Java Method: Logger#log
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Method ID or nullptr if the class or method id could not
|
|
* be retieved
|
|
*/
|
|
static jmethodID getLogMethodId(JNIEnv* env) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
static jmethodID mid =
|
|
env->GetMethodID(jclazz, "log",
|
|
"(Lorg/rocksdb/InfoLogLevel;Ljava/lang/String;)V");
|
|
assert(mid != nullptr);
|
|
return mid;
|
|
}
|
|
};
|
|
|
|
// The portal class for org.rocksdb.TransactionLogIterator.BatchResult
|
|
class BatchResultJni : public JavaClass {
|
|
public:
|
|
/**
|
|
* Get the Java Class org.rocksdb.TransactionLogIterator.BatchResult
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
*
|
|
* @return The Java Class or nullptr if one of the
|
|
* ClassFormatError, ClassCircularityError, NoClassDefFoundError,
|
|
* OutOfMemoryError or ExceptionInInitializerError exceptions is thrown
|
|
*/
|
|
static jclass getJClass(JNIEnv* env) {
|
|
return JavaClass::getJClass(env,
|
|
"org/rocksdb/TransactionLogIterator$BatchResult");
|
|
}
|
|
|
|
/**
|
|
* Create a new Java org.rocksdb.TransactionLogIterator.BatchResult object
|
|
* with the same properties as the provided C++ rocksdb::BatchResult object
|
|
*
|
|
* @param env A pointer to the Java environment
|
|
* @param batch_result The rocksdb::BatchResult object
|
|
*
|
|
* @return A reference to a Java
|
|
* org.rocksdb.TransactionLogIterator.BatchResult object,
|
|
* or nullptr if an an exception occurs
|
|
*/
|
|
static jobject construct(JNIEnv* env,
|
|
rocksdb::BatchResult& batch_result) {
|
|
jclass jclazz = getJClass(env);
|
|
if(jclazz == nullptr) {
|
|
// exception occurred accessing class
|
|
return nullptr;
|
|
}
|
|
|
|
jmethodID mid = env->GetMethodID(
|
|
jclazz, "<init>", "(JJ)V");
|
|
if(mid == nullptr) {
|
|
// exception thrown: NoSuchMethodException or OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
jobject jbatch_result = env->NewObject(jclazz, mid,
|
|
batch_result.sequence, batch_result.writeBatchPtr.get());
|
|
if(jbatch_result == nullptr) {
|
|
// exception thrown: InstantiationException or OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
batch_result.writeBatchPtr.release();
|
|
return jbatch_result;
|
|
}
|
|
};
|
|
|
|
// various utility functions for working with RocksDB and JNI
|
|
class JniUtil {
|
|
public:
|
|
/**
|
|
* Obtains a reference to the JNIEnv from
|
|
* the JVM
|
|
*
|
|
* If the current thread is not attached to the JavaVM
|
|
* then it will be attached so as to retrieve the JNIEnv
|
|
*
|
|
* If a thread is attached, it must later be manually
|
|
* released by calling JavaVM::DetachCurrentThread.
|
|
* This can be handled by always matching calls to this
|
|
* function with calls to {@link JniUtil::releaseJniEnv(JavaVM*, jboolean)}
|
|
*
|
|
* @param jvm (IN) A pointer to the JavaVM instance
|
|
* @param attached (OUT) A pointer to a boolean which
|
|
* will be set to JNI_TRUE if we had to attach the thread
|
|
*
|
|
* @return A pointer to the JNIEnv or nullptr if a fatal error
|
|
* occurs and the JNIEnv cannot be retrieved
|
|
*/
|
|
static JNIEnv* getJniEnv(JavaVM* jvm, jboolean* attached) {
|
|
assert(jvm != nullptr);
|
|
|
|
JNIEnv *env;
|
|
const jint env_rs = jvm->GetEnv(reinterpret_cast<void**>(&env),
|
|
JNI_VERSION_1_2);
|
|
|
|
if(env_rs == JNI_OK) {
|
|
// current thread is already attached, return the JNIEnv
|
|
*attached = JNI_FALSE;
|
|
return env;
|
|
} else if(env_rs == JNI_EDETACHED) {
|
|
// current thread is not attached, attempt to attach
|
|
const jint rs_attach = jvm->AttachCurrentThread(reinterpret_cast<void**>(&env), NULL);
|
|
if(rs_attach == JNI_OK) {
|
|
*attached = JNI_TRUE;
|
|
return env;
|
|
} else {
|
|
// error, could not attach the thread
|
|
std::cerr << "JniUtil::getJinEnv - Fatal: could not attach current thread to JVM!" << std::endl;
|
|
return nullptr;
|
|
}
|
|
} else if(env_rs == JNI_EVERSION) {
|
|
// error, JDK does not support JNI_VERSION_1_2+
|
|
std::cerr << "JniUtil::getJinEnv - Fatal: JDK does not support JNI_VERSION_1_2" << std::endl;
|
|
return nullptr;
|
|
} else {
|
|
std::cerr << "JniUtil::getJinEnv - Fatal: Unknown error: env_rs=" << env_rs << std::endl;
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Counterpart to {@link JniUtil::getJniEnv(JavaVM*, jboolean*)}
|
|
*
|
|
* Detachess the current thread from the JVM if it was previously
|
|
* attached
|
|
*
|
|
* @param jvm (IN) A pointer to the JavaVM instance
|
|
* @param attached (IN) JNI_TRUE if we previously had to attach the thread
|
|
* to the JavaVM to get the JNIEnv
|
|
*/
|
|
static void releaseJniEnv(JavaVM* jvm, jboolean& attached) {
|
|
assert(jvm != nullptr);
|
|
if(attached == JNI_TRUE) {
|
|
const jint rs_detach = jvm->DetachCurrentThread();
|
|
assert(rs_detach == JNI_OK);
|
|
if(rs_detach != JNI_OK) {
|
|
std::cerr << "JniUtil::getJinEnv - Warn: Unable to detach current thread from JVM!" << std::endl;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Copies a Java String[] to a C++ std::vector<std::string>
|
|
*
|
|
* @param env (IN) A pointer to the java environment
|
|
* @param jss (IN) The Java String array to copy
|
|
* @param has_exception (OUT) will be set to JNI_TRUE
|
|
* if an OutOfMemoryError or ArrayIndexOutOfBoundsException
|
|
* exception occurs
|
|
*
|
|
* @return A std::vector<std:string> containing copies of the Java strings
|
|
*/
|
|
static std::vector<std::string> copyStrings(JNIEnv* env,
|
|
jobjectArray jss, jboolean* has_exception) {
|
|
return rocksdb::JniUtil::copyStrings(env, jss,
|
|
env->GetArrayLength(jss), has_exception);
|
|
}
|
|
|
|
/**
|
|
* Copies a Java String[] to a C++ std::vector<std::string>
|
|
*
|
|
* @param env (IN) A pointer to the java environment
|
|
* @param jss (IN) The Java String array to copy
|
|
* @param jss_len (IN) The length of the Java String array to copy
|
|
* @param has_exception (OUT) will be set to JNI_TRUE
|
|
* if an OutOfMemoryError or ArrayIndexOutOfBoundsException
|
|
* exception occurs
|
|
*
|
|
* @return A std::vector<std:string> containing copies of the Java strings
|
|
*/
|
|
static std::vector<std::string> copyStrings(JNIEnv* env,
|
|
jobjectArray jss, const jsize jss_len, jboolean* has_exception) {
|
|
std::vector<std::string> strs;
|
|
for (jsize i = 0; i < jss_len; i++) {
|
|
jobject js = env->GetObjectArrayElement(jss, i);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: ArrayIndexOutOfBoundsException
|
|
*has_exception = JNI_TRUE;
|
|
return strs;
|
|
}
|
|
|
|
jstring jstr = static_cast<jstring>(js);
|
|
const char* str = env->GetStringUTFChars(jstr, nullptr);
|
|
if(str == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
env->DeleteLocalRef(js);
|
|
*has_exception = JNI_TRUE;
|
|
return strs;
|
|
}
|
|
|
|
strs.push_back(std::string(str));
|
|
|
|
env->ReleaseStringUTFChars(jstr, str);
|
|
env->DeleteLocalRef(js);
|
|
}
|
|
|
|
*has_exception = JNI_FALSE;
|
|
return strs;
|
|
}
|
|
|
|
/**
|
|
* Copies a jstring to a std::string
|
|
* and releases the original jstring
|
|
*
|
|
* If an exception occurs, then JNIEnv::ExceptionCheck()
|
|
* will have been called
|
|
*
|
|
* @param env (IN) A pointer to the java environment
|
|
* @param js (IN) The java string to copy
|
|
* @param has_exception (OUT) will be set to JNI_TRUE
|
|
* if an OutOfMemoryError exception occurs
|
|
*
|
|
* @return A std:string copy of the jstring, or an
|
|
* empty std::string if has_exception == JNI_TRUE
|
|
*/
|
|
static std::string copyString(JNIEnv* env, jstring js,
|
|
jboolean* has_exception) {
|
|
const char *utf = env->GetStringUTFChars(js, nullptr);
|
|
if(utf == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
env->ExceptionCheck();
|
|
*has_exception = JNI_TRUE;
|
|
return std::string();
|
|
} else if(env->ExceptionCheck()) {
|
|
// exception thrown
|
|
env->ReleaseStringUTFChars(js, utf);
|
|
*has_exception = JNI_TRUE;
|
|
return std::string();
|
|
}
|
|
|
|
std::string name(utf);
|
|
env->ReleaseStringUTFChars(js, utf);
|
|
*has_exception = JNI_FALSE;
|
|
return name;
|
|
}
|
|
|
|
/**
|
|
* Copies bytes from a std::string to a jByteArray
|
|
*
|
|
* @param env A pointer to the java environment
|
|
* @param bytes The bytes to copy
|
|
*
|
|
* @return the Java byte[] or nullptr if an exception occurs
|
|
*/
|
|
static jbyteArray copyBytes(JNIEnv* env, std::string bytes) {
|
|
const jsize jlen = static_cast<jsize>(bytes.size());
|
|
|
|
jbyteArray jbytes = env->NewByteArray(jlen);
|
|
if(jbytes == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
env->SetByteArrayRegion(jbytes, 0, jlen,
|
|
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(bytes.c_str())));
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: ArrayIndexOutOfBoundsException
|
|
env->DeleteLocalRef(jbytes);
|
|
return nullptr;
|
|
}
|
|
|
|
return jbytes;
|
|
}
|
|
|
|
/**
|
|
* Given a Java byte[][] which is an array of java.lang.Strings
|
|
* where each String is a byte[], the passed function `string_fn`
|
|
* will be called on each String, the result is the collected by
|
|
* calling the passed function `collector_fn`
|
|
*
|
|
* @param env (IN) A pointer to the java environment
|
|
* @param jbyte_strings (IN) A Java array of Strings expressed as bytes
|
|
* @param string_fn (IN) A transform function to call for each String
|
|
* @param collector_fn (IN) A collector which is called for the result
|
|
* of each `string_fn`
|
|
* @param has_exception (OUT) will be set to JNI_TRUE
|
|
* if an ArrayIndexOutOfBoundsException or OutOfMemoryError
|
|
* exception occurs
|
|
*/
|
|
template <typename T> static void byteStrings(JNIEnv* env,
|
|
jobjectArray jbyte_strings,
|
|
std::function<T(const char*, const size_t)> string_fn,
|
|
std::function<void(size_t, T)> collector_fn,
|
|
jboolean *has_exception) {
|
|
const jsize jlen = env->GetArrayLength(jbyte_strings);
|
|
|
|
for(jsize i = 0; i < jlen; i++) {
|
|
jobject jbyte_string_obj = env->GetObjectArrayElement(jbyte_strings, i);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: ArrayIndexOutOfBoundsException
|
|
*has_exception = JNI_TRUE; // signal error
|
|
return;
|
|
}
|
|
|
|
jbyteArray jbyte_string_ary =
|
|
reinterpret_cast<jbyteArray>(jbyte_string_obj);
|
|
T result = byteString(env, jbyte_string_ary, string_fn, has_exception);
|
|
|
|
env->DeleteLocalRef(jbyte_string_obj);
|
|
|
|
if(*has_exception == JNI_TRUE) {
|
|
// exception thrown: OutOfMemoryError
|
|
return;
|
|
}
|
|
|
|
collector_fn(i, result);
|
|
}
|
|
|
|
*has_exception = JNI_FALSE;
|
|
}
|
|
|
|
/**
|
|
* Given a Java String which is expressed as a Java Byte Array byte[],
|
|
* the passed function `string_fn` will be called on the String
|
|
* and the result returned
|
|
*
|
|
* @param env (IN) A pointer to the java environment
|
|
* @param jbyte_string_ary (IN) A Java String expressed in bytes
|
|
* @param string_fn (IN) A transform function to call on the String
|
|
* @param has_exception (OUT) will be set to JNI_TRUE
|
|
* if an OutOfMemoryError exception occurs
|
|
*/
|
|
template <typename T> static T byteString(JNIEnv* env,
|
|
jbyteArray jbyte_string_ary,
|
|
std::function<T(const char*, const size_t)> string_fn,
|
|
jboolean* has_exception) {
|
|
const jsize jbyte_string_len = env->GetArrayLength(jbyte_string_ary);
|
|
jbyte* jbyte_string =
|
|
env->GetByteArrayElements(jbyte_string_ary, nullptr);
|
|
if(jbyte_string == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
*has_exception = JNI_TRUE;
|
|
return nullptr; // signal error
|
|
}
|
|
|
|
T result =
|
|
string_fn(reinterpret_cast<char *>(jbyte_string), jbyte_string_len);
|
|
|
|
env->ReleaseByteArrayElements(jbyte_string_ary, jbyte_string, JNI_ABORT);
|
|
|
|
*has_exception = JNI_FALSE;
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Converts a std::vector<string> to a Java byte[][] where each Java String
|
|
* is expressed as a Java Byte Array byte[].
|
|
*
|
|
* @param env A pointer to the java environment
|
|
* @param strings A vector of Strings
|
|
*
|
|
* @return A Java array of Strings expressed as bytes
|
|
*/
|
|
static jobjectArray stringsBytes(JNIEnv* env, std::vector<std::string> strings) {
|
|
jclass jcls_ba = ByteJni::getArrayJClass(env);
|
|
if(jcls_ba == nullptr) {
|
|
// exception occurred
|
|
return nullptr;
|
|
}
|
|
|
|
const jsize len = static_cast<jsize>(strings.size());
|
|
|
|
jobjectArray jbyte_strings = env->NewObjectArray(len, jcls_ba, nullptr);
|
|
if(jbyte_strings == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
for (jsize i = 0; i < len; i++) {
|
|
std::string *str = &strings[i];
|
|
const jsize str_len = static_cast<jsize>(str->size());
|
|
|
|
jbyteArray jbyte_string_ary = env->NewByteArray(str_len);
|
|
if(jbyte_string_ary == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
env->DeleteLocalRef(jbyte_strings);
|
|
return nullptr;
|
|
}
|
|
|
|
env->SetByteArrayRegion(
|
|
jbyte_string_ary, 0, str_len,
|
|
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(str->c_str())));
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: ArrayIndexOutOfBoundsException
|
|
env->DeleteLocalRef(jbyte_string_ary);
|
|
env->DeleteLocalRef(jbyte_strings);
|
|
return nullptr;
|
|
}
|
|
|
|
env->SetObjectArrayElement(jbyte_strings, i, jbyte_string_ary);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: ArrayIndexOutOfBoundsException
|
|
// or ArrayStoreException
|
|
env->DeleteLocalRef(jbyte_string_ary);
|
|
env->DeleteLocalRef(jbyte_strings);
|
|
return nullptr;
|
|
}
|
|
|
|
env->DeleteLocalRef(jbyte_string_ary);
|
|
}
|
|
|
|
return jbyte_strings;
|
|
}
|
|
|
|
/*
|
|
* Helper for operations on a key and value
|
|
* for example WriteBatch->Put
|
|
*
|
|
* TODO(AR) could be extended to cover returning rocksdb::Status
|
|
* from `op` and used for RocksDB->Put etc.
|
|
*/
|
|
static void kv_op(
|
|
std::function<void(rocksdb::Slice, rocksdb::Slice)> op,
|
|
JNIEnv* env, jobject jobj,
|
|
jbyteArray jkey, jint jkey_len,
|
|
jbyteArray jentry_value, jint jentry_value_len) {
|
|
jbyte* key = env->GetByteArrayElements(jkey, nullptr);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: OutOfMemoryError
|
|
return;
|
|
}
|
|
|
|
jbyte* value = env->GetByteArrayElements(jentry_value, nullptr);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: OutOfMemoryError
|
|
if(key != nullptr) {
|
|
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
|
|
}
|
|
return;
|
|
}
|
|
|
|
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
|
|
rocksdb::Slice value_slice(reinterpret_cast<char*>(value),
|
|
jentry_value_len);
|
|
|
|
op(key_slice, value_slice);
|
|
|
|
if(value != nullptr) {
|
|
env->ReleaseByteArrayElements(jentry_value, value, JNI_ABORT);
|
|
}
|
|
if(key != nullptr) {
|
|
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Helper for operations on a key
|
|
* for example WriteBatch->Delete
|
|
*
|
|
* TODO(AR) could be extended to cover returning rocksdb::Status
|
|
* from `op` and used for RocksDB->Delete etc.
|
|
*/
|
|
static void k_op(
|
|
std::function<void(rocksdb::Slice)> op,
|
|
JNIEnv* env, jobject jobj,
|
|
jbyteArray jkey, jint jkey_len) {
|
|
jbyte* key = env->GetByteArrayElements(jkey, nullptr);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: OutOfMemoryError
|
|
return;
|
|
}
|
|
|
|
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
|
|
|
|
op(key_slice);
|
|
|
|
if(key != nullptr) {
|
|
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Helper for operations on a value
|
|
* for example WriteBatchWithIndex->GetFromBatch
|
|
*/
|
|
static jbyteArray v_op(
|
|
std::function<rocksdb::Status(rocksdb::Slice, std::string*)> op,
|
|
JNIEnv* env, jbyteArray jkey, jint jkey_len) {
|
|
jbyte* key = env->GetByteArrayElements(jkey, nullptr);
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
rocksdb::Slice key_slice(reinterpret_cast<char*>(key), jkey_len);
|
|
|
|
std::string value;
|
|
rocksdb::Status s = op(key_slice, &value);
|
|
|
|
if(key != nullptr) {
|
|
env->ReleaseByteArrayElements(jkey, key, JNI_ABORT);
|
|
}
|
|
|
|
if (s.IsNotFound()) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (s.ok()) {
|
|
jbyteArray jret_value =
|
|
env->NewByteArray(static_cast<jsize>(value.size()));
|
|
if(jret_value == nullptr) {
|
|
// exception thrown: OutOfMemoryError
|
|
return nullptr;
|
|
}
|
|
|
|
env->SetByteArrayRegion(jret_value, 0, static_cast<jsize>(value.size()),
|
|
const_cast<jbyte*>(reinterpret_cast<const jbyte*>(value.c_str())));
|
|
if(env->ExceptionCheck()) {
|
|
// exception thrown: ArrayIndexOutOfBoundsException
|
|
if(jret_value != nullptr) {
|
|
env->DeleteLocalRef(jret_value);
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
return jret_value;
|
|
}
|
|
|
|
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
|
|
return nullptr;
|
|
}
|
|
};
|
|
|
|
} // namespace rocksdb
|
|
#endif // JAVA_ROCKSJNI_PORTAL_H_
|