rocksdb/java/rocksjni/backupenginejni.cc
Yueh-Hsuan Chiang ce21afd205 Expose the BackupEngine from the Java API
Summary:
Merge pull request #665 by adamretter

Exposes BackupEngine from C++ to the Java API. Previously only BackupableDB was available

Test Plan: BackupEngineTest.java

Reviewers: fyrz, igor, ankgup87, yhchiang

Reviewed By: yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D42873
2015-08-04 16:08:54 -07:00

217 lines
6.7 KiB
C++

// Copyright (c) 2015, 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
// calling C++ rocksdb::BackupEngine methods from the Java side.
#include <jni.h>
#include <vector>
#include "include/org_rocksdb_BackupEngine.h"
#include "rocksdb/utilities/backupable_db.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_BackupEngine
* Method: open
* Signature: (JJ)V
*/
void Java_org_rocksdb_BackupEngine_open(
JNIEnv* env, jobject jbe, jlong env_handle,
jlong backupable_db_options_handle) {
auto* rocks_env = reinterpret_cast<rocksdb::Env*>(env_handle);
auto* backupable_db_options =
reinterpret_cast<rocksdb::BackupableDBOptions*>(
backupable_db_options_handle);
rocksdb::BackupEngine* backup_engine;
auto status = rocksdb::BackupEngine::Open(rocks_env,
*backupable_db_options, &backup_engine);
if (status.ok()) {
rocksdb::BackupEngineJni::setHandle(env, jbe, backup_engine);
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: createNewBackup
* Signature: (JJZ)V
*/
void Java_org_rocksdb_BackupEngine_createNewBackup(
JNIEnv* env, jobject jbe, jlong jbe_handle, jlong db_handle,
jboolean jflush_before_backup) {
auto* db = reinterpret_cast<rocksdb::DB*>(db_handle);
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
auto status = backup_engine->CreateNewBackup(db,
static_cast<bool>(jflush_before_backup));
if (status.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: getBackupInfo
* Signature: (J)Ljava/util/List;
*/
jobject Java_org_rocksdb_BackupEngine_getBackupInfo(
JNIEnv* env, jobject jbe, jlong jbe_handle) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
std::vector<rocksdb::BackupInfo> backup_infos;
backup_engine->GetBackupInfo(&backup_infos);
return rocksdb::BackupInfoListJni::getBackupInfo(env, backup_infos);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: getCorruptedBackups
* Signature: (J)[I
*/
jintArray Java_org_rocksdb_BackupEngine_getCorruptedBackups(
JNIEnv* env, jobject jbe, jlong jbe_handle) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
std::vector<rocksdb::BackupID> backup_ids;
backup_engine->GetCorruptedBackups(&backup_ids);
// store backupids in int array
const std::vector<rocksdb::BackupID>::size_type
kIdSize = backup_ids.size();
int int_backup_ids[kIdSize];
for (std::vector<rocksdb::BackupID>::size_type i = 0;
i != kIdSize; i++) {
int_backup_ids[i] = backup_ids[i];
}
// Store ints in java array
jintArray ret_backup_ids;
// Its ok to loose precision here (64->32)
jsize ret_backup_ids_size = static_cast<jsize>(kIdSize);
ret_backup_ids = env->NewIntArray(ret_backup_ids_size);
env->SetIntArrayRegion(ret_backup_ids, 0, ret_backup_ids_size,
int_backup_ids);
return ret_backup_ids;
}
/*
* Class: org_rocksdb_BackupEngine
* Method: garbageCollect
* Signature: (J)V
*/
void Java_org_rocksdb_BackupEngine_garbageCollect(
JNIEnv* env, jobject jbe, jlong jbe_handle) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
auto status = backup_engine->GarbageCollect();
if (status.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: purgeOldBackups
* Signature: (JI)V
*/
void Java_org_rocksdb_BackupEngine_purgeOldBackups(
JNIEnv* env, jobject jbe, jlong jbe_handle, jint jnum_backups_to_keep) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
auto status =
backup_engine->
PurgeOldBackups(static_cast<uint32_t>(jnum_backups_to_keep));
if (status.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: deleteBackup
* Signature: (JI)V
*/
void Java_org_rocksdb_BackupEngine_deleteBackup(
JNIEnv* env, jobject jbe, jlong jbe_handle, jint jbackup_id) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
auto status =
backup_engine->DeleteBackup(static_cast<rocksdb::BackupID>(jbackup_id));
if (status.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: restoreDbFromBackup
* Signature: (JILjava/lang/String;Ljava/lang/String;J)V
*/
void Java_org_rocksdb_BackupEngine_restoreDbFromBackup(
JNIEnv* env, jobject jbe, jlong jbe_handle, jint jbackup_id,
jstring jdb_dir, jstring jwal_dir, jlong jrestore_options_handle) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
const char* db_dir = env->GetStringUTFChars(jdb_dir, 0);
const char* wal_dir = env->GetStringUTFChars(jwal_dir, 0);
auto* restore_options =
reinterpret_cast<rocksdb::RestoreOptions*>(jrestore_options_handle);
auto status =
backup_engine->RestoreDBFromBackup(
static_cast<rocksdb::BackupID>(jbackup_id), db_dir, wal_dir,
*restore_options);
env->ReleaseStringUTFChars(jwal_dir, wal_dir);
env->ReleaseStringUTFChars(jdb_dir, db_dir);
if (status.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: restoreDbFromLatestBackup
* Signature: (JLjava/lang/String;Ljava/lang/String;J)V
*/
void Java_org_rocksdb_BackupEngine_restoreDbFromLatestBackup(
JNIEnv* env, jobject jbe, jlong jbe_handle, jstring jdb_dir,
jstring jwal_dir, jlong jrestore_options_handle) {
auto* backup_engine = reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
const char* db_dir = env->GetStringUTFChars(jdb_dir, 0);
const char* wal_dir = env->GetStringUTFChars(jwal_dir, 0);
auto* restore_options =
reinterpret_cast<rocksdb::RestoreOptions*>(jrestore_options_handle);
auto status =
backup_engine->RestoreDBFromLatestBackup(db_dir, wal_dir,
*restore_options);
env->ReleaseStringUTFChars(jwal_dir, wal_dir);
env->ReleaseStringUTFChars(jdb_dir, db_dir);
if (status.ok()) {
return;
}
rocksdb::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_BackupEngine_disposeInternal(
JNIEnv* env, jobject jbe, jlong jbe_handle) {
delete reinterpret_cast<rocksdb::BackupEngine*>(jbe_handle);
}