61955a0dda
Summary: Add RocksObject, the base class of all java objects which has a c++ pointer. While the finalizer of a RocksObject will release its c++ resource, it is suggested to call its RocksObject.dispose() to manually release its c++ resource. Existing RocksDB java classes are now extending RocksObject. Test Plan: make rocksdbjava make jtest make jdb_bench Reviewers: haobo, dhruba, sdong, ankgup87, rsumbaly, swapnilghike, zzbennett Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D18411
146 lines
3.7 KiB
C++
146 lines
3.7 KiB
C++
// Copyright (c) 2014, 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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//
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// This file implements the "bridge" between Java and C++ and enables
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// calling c++ rocksdb::Iterator methods from Java side.
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#include <stdio.h>
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#include <stdlib.h>
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#include <jni.h>
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#include "include/org_rocksdb_Iterator.h"
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#include "rocksjni/portal.h"
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#include "rocksdb/iterator.h"
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/*
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* Class: org_rocksdb_Iterator
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* Method: isValid0
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* Signature: (J)Z
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*/
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jboolean Java_org_rocksdb_Iterator_isValid0(
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JNIEnv* env, jobject jobj, jlong handle) {
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return reinterpret_cast<rocksdb::Iterator*>(handle)->Valid();
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: seekToFirst0
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* Signature: (J)V
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*/
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void Java_org_rocksdb_Iterator_seekToFirst0(
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JNIEnv* env, jobject jobj, jlong handle) {
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reinterpret_cast<rocksdb::Iterator*>(handle)->SeekToFirst();
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: seekToFirst0
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* Signature: (J)V
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*/
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void Java_org_rocksdb_Iterator_seekToLast0(
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JNIEnv* env, jobject jobj, jlong handle) {
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reinterpret_cast<rocksdb::Iterator*>(handle)->SeekToLast();
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: seekToLast0
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* Signature: (J)V
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*/
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void Java_org_rocksdb_Iterator_next0(
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JNIEnv* env, jobject jobj, jlong handle) {
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reinterpret_cast<rocksdb::Iterator*>(handle)->Next();
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: next0
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* Signature: (J)V
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*/
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void Java_org_rocksdb_Iterator_prev0(
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JNIEnv* env, jobject jobj, jlong handle) {
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reinterpret_cast<rocksdb::Iterator*>(handle)->Prev();
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: prev0
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* Signature: (J)V
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*/
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jbyteArray Java_org_rocksdb_Iterator_key0(
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JNIEnv* env, jobject jobj, jlong handle) {
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auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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rocksdb::Slice key_slice = it->key();
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jbyteArray jkey = env->NewByteArray(key_slice.size());
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env->SetByteArrayRegion(
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jkey, 0, key_slice.size(),
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reinterpret_cast<const jbyte*>(key_slice.data()));
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return jkey;
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: key0
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* Signature: (J)[B
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*/
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jbyteArray Java_org_rocksdb_Iterator_value0(
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JNIEnv* env, jobject jobj, jlong handle) {
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auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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rocksdb::Slice value_slice = it->value();
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jbyteArray jvalue = env->NewByteArray(value_slice.size());
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env->SetByteArrayRegion(
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jvalue, 0, value_slice.size(),
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reinterpret_cast<const jbyte*>(value_slice.data()));
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return jvalue;
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: value0
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* Signature: (J)[B
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*/
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void Java_org_rocksdb_Iterator_seek0(
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JNIEnv* env, jobject jobj, jlong handle,
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jbyteArray jtarget, jint jtarget_len) {
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auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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jbyte* target = env->GetByteArrayElements(jtarget, 0);
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rocksdb::Slice target_slice(
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reinterpret_cast<char*>(target), jtarget_len);
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it->Seek(target_slice);
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env->ReleaseByteArrayElements(jtarget, target, JNI_ABORT);
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: seek0
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* Signature: (J[BI)V
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*/
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void Java_org_rocksdb_Iterator_status0(
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JNIEnv* env, jobject jobj, jlong handle) {
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auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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rocksdb::Status s = it->status();
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if (s.ok()) {
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return;
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}
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rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
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}
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/*
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* Class: org_rocksdb_Iterator
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* Method: dispose
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* Signature: (J)V
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*/
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void Java_org_rocksdb_Iterator_dispose(
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JNIEnv* env, jobject jobj, jlong handle) {
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auto it = reinterpret_cast<rocksdb::Iterator*>(handle);
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delete it;
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}
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