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// 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_NAMESPACE::BackupEngine methods from the Java side.
#include <jni.h>
#include <vector>
#include "include/org_rocksdb_BackupEngine.h"
#include "rocksdb/utilities/backup_engine.h"
#include "rocksjni/cplusplus_to_java_convert.h"
#include "rocksjni/portal.h"
/*
* Class: org_rocksdb_BackupEngine
* Method: open
* Signature: (JJ)J
*/
jlong Java_org_rocksdb_BackupEngine_open(JNIEnv* env, jclass /*jcls*/,
jlong env_handle,
jlong backup_engine_options_handle) {
auto* rocks_env = reinterpret_cast<ROCKSDB_NAMESPACE::Env*>(env_handle);
auto* backup_engine_options =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngineOptions*>(
backup_engine_options_handle);
ROCKSDB_NAMESPACE::BackupEngine* backup_engine;
auto status = ROCKSDB_NAMESPACE::BackupEngine::Open(
rocks_env, *backup_engine_options, &backup_engine);
if (status.ok()) {
return GET_CPLUSPLUS_POINTER(backup_engine);
} else {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, status);
return 0;
}
}
/*
* Class: org_rocksdb_BackupEngine
* Method: createNewBackup
* Signature: (JJZ)V
*/
void Java_org_rocksdb_BackupEngine_createNewBackup(
JNIEnv* env, jclass /*jbe*/, jlong jbe_handle, jlong db_handle,
jboolean jflush_before_backup) {
auto* db = reinterpret_cast<ROCKSDB_NAMESPACE::DB*>(db_handle);
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
auto status = backup_engine->CreateNewBackup(
db, static_cast<bool>(jflush_before_backup));
if (status.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: createNewBackupWithMetadata
* Signature: (JJLjava/lang/String;Z)V
*/
void Java_org_rocksdb_BackupEngine_createNewBackupWithMetadata(
JNIEnv* env, jclass /*jbe*/, jlong jbe_handle, jlong db_handle,
jstring japp_metadata, jboolean jflush_before_backup) {
auto* db = reinterpret_cast<ROCKSDB_NAMESPACE::DB*>(db_handle);
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
jboolean has_exception = JNI_FALSE;
std::string app_metadata = ROCKSDB_NAMESPACE::JniUtil::copyStdString(
env, japp_metadata, &has_exception);
if (has_exception == JNI_TRUE) {
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(
env, "Could not copy jstring to std::string");
return;
}
auto status = backup_engine->CreateNewBackupWithMetadata(
db, app_metadata, static_cast<bool>(jflush_before_backup));
if (status.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: getBackupInfo
* Signature: (J)Ljava/util/List;
*/
jobject Java_org_rocksdb_BackupEngine_getBackupInfo(JNIEnv* env,
jclass /*jcls*/,
jlong jbe_handle) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
std::vector<ROCKSDB_NAMESPACE::BackupInfo> backup_infos;
backup_engine->GetBackupInfo(&backup_infos);
return ROCKSDB_NAMESPACE::BackupInfoListJni::getBackupInfo(env, backup_infos);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: getCorruptedBackups
* Signature: (J)[I
*/
jintArray Java_org_rocksdb_BackupEngine_getCorruptedBackups(JNIEnv* env,
jclass /*jcls*/,
jlong jbe_handle) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
std::vector<ROCKSDB_NAMESPACE::BackupID> backup_ids;
backup_engine->GetCorruptedBackups(&backup_ids);
// store backupids in int array
std::vector<jint> int_backup_ids(backup_ids.begin(), backup_ids.end());
// Store ints in java array
// Its ok to loose precision here (64->32)
jsize ret_backup_ids_size = static_cast<jsize>(backup_ids.size());
jintArray ret_backup_ids = env->NewIntArray(ret_backup_ids_size);
if (ret_backup_ids == nullptr) {
// exception thrown: OutOfMemoryError
return nullptr;
}
env->SetIntArrayRegion(ret_backup_ids, 0, ret_backup_ids_size,
int_backup_ids.data());
return ret_backup_ids;
}
/*
* Class: org_rocksdb_BackupEngine
* Method: garbageCollect
* Signature: (J)V
*/
void Java_org_rocksdb_BackupEngine_garbageCollect(JNIEnv* env, jclass /*jbe*/,
jlong jbe_handle) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
auto status = backup_engine->GarbageCollect();
if (status.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: purgeOldBackups
* Signature: (JI)V
*/
void Java_org_rocksdb_BackupEngine_purgeOldBackups(JNIEnv* env, jclass /*jbe*/,
jlong jbe_handle,
jint jnum_backups_to_keep) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
auto status = backup_engine->PurgeOldBackups(
static_cast<uint32_t>(jnum_backups_to_keep));
if (status.ok()) {
return;
}
ROCKSDB_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: deleteBackup
* Signature: (JI)V
*/
void Java_org_rocksdb_BackupEngine_deleteBackup(JNIEnv* env, jclass /*jbe*/,
jlong jbe_handle,
jint jbackup_id) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
auto status = backup_engine->DeleteBackup(
static_cast<ROCKSDB_NAMESPACE::BackupID>(jbackup_id));
if (status.ok()) {
return;
}
ROCKSDB_NAMESPACE::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, jclass /*jbe*/, jlong jbe_handle, jint jbackup_id,
jstring jdb_dir, jstring jwal_dir, jlong jrestore_options_handle) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
const char* db_dir = env->GetStringUTFChars(jdb_dir, nullptr);
if (db_dir == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
const char* wal_dir = env->GetStringUTFChars(jwal_dir, nullptr);
if (wal_dir == nullptr) {
// exception thrown: OutOfMemoryError
env->ReleaseStringUTFChars(jdb_dir, db_dir);
return;
}
auto* restore_options = reinterpret_cast<ROCKSDB_NAMESPACE::RestoreOptions*>(
jrestore_options_handle);
auto status = backup_engine->RestoreDBFromBackup(
static_cast<ROCKSDB_NAMESPACE::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_NAMESPACE::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, jclass /*jbe*/, jlong jbe_handle, jstring jdb_dir,
jstring jwal_dir, jlong jrestore_options_handle) {
auto* backup_engine =
reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
const char* db_dir = env->GetStringUTFChars(jdb_dir, nullptr);
if (db_dir == nullptr) {
// exception thrown: OutOfMemoryError
return;
}
const char* wal_dir = env->GetStringUTFChars(jwal_dir, nullptr);
if (wal_dir == nullptr) {
// exception thrown: OutOfMemoryError
env->ReleaseStringUTFChars(jdb_dir, db_dir);
return;
}
auto* restore_options = reinterpret_cast<ROCKSDB_NAMESPACE::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_NAMESPACE::RocksDBExceptionJni::ThrowNew(env, status);
}
/*
* Class: org_rocksdb_BackupEngine
* Method: disposeInternal
* Signature: (J)V
*/
void Java_org_rocksdb_BackupEngine_disposeInternalJni(JNIEnv* /*env*/,
jclass /*jcls*/,
jlong jbe_handle) {
auto* be = reinterpret_cast<ROCKSDB_NAMESPACE::BackupEngine*>(jbe_handle);
assert(be != nullptr);
delete be;
}
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