rocksdb/java/rocksjni/backupablejni.cc

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// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
// This file implements the "bridge" between Java and C++ and enables
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// calling c++ rocksdb::BackupableDB and rocksdb::BackupableDBOptions methods
// from Java side.
#include <stdio.h>
#include <stdlib.h>
#include <jni.h>
#include <string>
#include "include/org_rocksdb_BackupableDB.h"
#include "include/org_rocksdb_BackupableDBOptions.h"
#include "rocksjni/portal.h"
#include "utilities/backupable_db.h"
/*
* Class: org_rocksdb_BackupableDB
* Method: open
* Signature: (JJ)V
*/
void Java_org_rocksdb_BackupableDB_open(
JNIEnv* env, jobject jbdb, jlong jdb_handle, jlong jopt_handle) {
auto db = reinterpret_cast<rocksdb::DB*>(jdb_handle);
auto opt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jopt_handle);
auto bdb = new rocksdb::BackupableDB(db, *opt);
// as BackupableDB extends RocksDB on the java side, we can reuse
// the RocksDB portal here.
rocksdb::RocksDBJni::setHandle(env, jbdb, bdb);
}
/*
* Class: org_rocksdb_BackupableDB
* Method: createNewBackup
* Signature: (JZ)V
*/
void Java_org_rocksdb_BackupableDB_createNewBackup(
JNIEnv* env, jobject jbdb, jlong jhandle, jboolean jflag) {
reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->CreateNewBackup(jflag);
}
///////////////////////////////////////////////////////////////////////////
// BackupDBOptions
/*
* Class: org_rocksdb_BackupableDBOptions
* Method: newBackupableDBOptions
* Signature: (Ljava/lang/String;)V
*/
void Java_org_rocksdb_BackupableDBOptions_newBackupableDBOptions(
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JNIEnv* env, jobject jobj, jstring jpath, jboolean jshare_table_files,
jboolean jsync, jboolean jdestroy_old_data, jboolean jbackup_log_files,
jlong jbackup_rate_limit, jlong jrestore_rate_limit) {
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jbackup_rate_limit = (jbackup_rate_limit <= 0) ? 0 : jbackup_rate_limit;
jrestore_rate_limit = (jrestore_rate_limit <= 0) ? 0 : jrestore_rate_limit;
const char* cpath = env->GetStringUTFChars(jpath, 0);
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auto bopt = new rocksdb::BackupableDBOptions(cpath, nullptr,
jshare_table_files, nullptr, jsync, jdestroy_old_data, jbackup_log_files,
jbackup_rate_limit, jrestore_rate_limit);
env->ReleaseStringUTFChars(jpath, cpath);
rocksdb::BackupableDBOptionsJni::setHandle(env, jobj, bopt);
}
/*
* Class: org_rocksdb_BackupableDBOptions
* Method: backupDir
* Signature: (J)Ljava/lang/String;
*/
jstring Java_org_rocksdb_BackupableDBOptions_backupDir(
JNIEnv* env, jobject jopt, jlong jhandle, jstring jpath) {
auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
return env->NewStringUTF(bopt->backup_dir.c_str());
}
/*
* Class: org_rocksdb_BackupableDBOptions
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_BackupableDBOptions_disposeInternal(
JNIEnv* env, jobject jopt, jlong jhandle) {
auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
assert(bopt);
delete bopt;
rocksdb::BackupableDBOptionsJni::setHandle(env, jopt, nullptr);
}