rocksdb/java/rocksjni/options_util.cc
Sagar Vemuri c8f3606731 Expose LoadLatestOptions, LoadOptionsFromFile and GetLatestOptionsFileName APIs in RocksJava
Summary:
JNI wrappers for LoadLatestOptions, LoadOptionsFromFile and GetLatestOptionsFileName APIs.
Closes https://github.com/facebook/rocksdb/pull/2898

Differential Revision: D5857934

Pulled By: sagar0

fbshipit-source-id: 68b79e83eab8de9416e3f1fef73e11cf7947e90a
2017-09-21 17:29:13 -07:00

115 lines
3.9 KiB
C++

// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
// This source code is licensed under both the GPLv2 (found in the
// COPYING file in the root directory) and Apache 2.0 License
// (found in the LICENSE.Apache file in the root directory).
//
// This file implements the "bridge" between Java and C++ and enables
// calling C++ rocksdb::OptionsUtil methods from Java side.
#include <jni.h>
#include "include/org_rocksdb_OptionsUtil.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/utilities/options_util.h"
#include "rocksjni/portal.h"
void build_column_family_descriptor_list(
JNIEnv* env, jobject jcfds,
std::vector<rocksdb::ColumnFamilyDescriptor>& cf_descs) {
jmethodID add_mid = rocksdb::ListJni::getListAddMethodId(env);
if (add_mid == nullptr) {
// exception occurred accessing method
return;
}
// Column family descriptor
for (rocksdb::ColumnFamilyDescriptor& cfd : cf_descs) {
// Construct a ColumnFamilyDescriptor java object
jobject jcfd = rocksdb::ColumnFamilyDescriptorJni::construct(env, &cfd);
if (env->ExceptionCheck()) {
// exception occurred constructing object
if (jcfd != nullptr) {
env->DeleteLocalRef(jcfd);
}
return;
}
// Add the object to java list.
jboolean rs = env->CallBooleanMethod(jcfds, add_mid, jcfd);
if (env->ExceptionCheck() || rs == JNI_FALSE) {
// exception occurred calling method, or could not add
if (jcfd != nullptr) {
env->DeleteLocalRef(jcfd);
}
return;
}
}
}
/*
* Class: org_rocksdb_OptionsUtil
* Method: loadLatestOptions
* Signature: (Ljava/lang/String;JLjava/util/List;Z)V
*/
void Java_org_rocksdb_OptionsUtil_loadLatestOptions(
JNIEnv* env, jclass jcls, jstring jdbpath, jlong jenv_handle,
jlong jdb_opts_handle, jobject jcfds, jboolean ignore_unknown_options) {
const char* db_path = env->GetStringUTFChars(jdbpath, nullptr);
std::vector<rocksdb::ColumnFamilyDescriptor> cf_descs;
rocksdb::Status s = rocksdb::LoadLatestOptions(
db_path, reinterpret_cast<rocksdb::Env*>(jenv_handle),
reinterpret_cast<rocksdb::DBOptions*>(jdb_opts_handle), &cf_descs,
ignore_unknown_options);
env->ReleaseStringUTFChars(jdbpath, db_path);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
build_column_family_descriptor_list(env, jcfds, cf_descs);
}
/*
* Class: org_rocksdb_OptionsUtil
* Method: loadOptionsFromFile
* Signature: (Ljava/lang/String;JJLjava/util/List;Z)V
*/
void Java_org_rocksdb_OptionsUtil_loadOptionsFromFile(
JNIEnv* env, jclass jcls, jstring jopts_file_name, jlong jenv_handle,
jlong jdb_opts_handle, jobject jcfds, jboolean ignore_unknown_options) {
const char* opts_file_name = env->GetStringUTFChars(jopts_file_name, nullptr);
std::vector<rocksdb::ColumnFamilyDescriptor> cf_descs;
rocksdb::Status s = rocksdb::LoadOptionsFromFile(
opts_file_name, reinterpret_cast<rocksdb::Env*>(jenv_handle),
reinterpret_cast<rocksdb::DBOptions*>(jdb_opts_handle), &cf_descs,
ignore_unknown_options);
env->ReleaseStringUTFChars(jopts_file_name, opts_file_name);
if (!s.ok()) {
rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
}
build_column_family_descriptor_list(env, jcfds, cf_descs);
}
/*
* Class: org_rocksdb_OptionsUtil
* Method: getLatestOptionsFileName
* Signature: (Ljava/lang/String;J)Ljava/lang/String;
*/
jstring Java_org_rocksdb_OptionsUtil_getLatestOptionsFileName(
JNIEnv* env, jclass jcls, jstring jdbpath, jlong jenv_handle) {
const char* db_path = env->GetStringUTFChars(jdbpath, nullptr);
std::string options_file_name;
if (db_path != nullptr) {
rocksdb::GetLatestOptionsFileName(
db_path, reinterpret_cast<rocksdb::Env*>(jenv_handle),
&options_file_name);
}
env->ReleaseStringUTFChars(jdbpath, db_path);
return env->NewStringUTF(options_file_name.c_str());
}