rocksdb/java/rocksjni/restorejni.cc

// 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
// calling c++ rocksdb::RestoreBackupableDB and rocksdb::RestoreOptions methods 
// from Java side.

#include <stdio.h>
#include <stdlib.h>
#include <jni.h>
#include <iostream>
#include <string>

#include "include/org_rocksdb_RestoreOptions.h"
#include "include/org_rocksdb_RestoreBackupableDB.h"
#include "rocksjni/portal.h"
#include "utilities/backupable_db.h"
/*
 * Class:     org_rocksdb_RestoreOptions
 * Method:    newRestoreOptions
 * Signature: (Z)V
 */
void Java_org_rocksdb_RestoreOptions_newRestoreOptions(JNIEnv* env,
    jobject jobj, jboolean keep_log_files) {
  auto ropt = new rocksdb::RestoreOptions(keep_log_files);
  rocksdb::RestoreOptionsJni::setHandle(env, jobj, ropt);
}

/*
 * Class:     org_rocksdb_RestoreOptions
 * Method:    dispose
 * Signature: (J)V
 */
void Java_org_rocksdb_RestoreOptions_dispose(JNIEnv* env, jobject jobj,
    jlong jhandle) {
  auto ropt = reinterpret_cast<rocksdb::RestoreOptions*>(jhandle);
  assert(ropt);
  delete ropt;

  rocksdb::RestoreOptionsJni::setHandle(env, jobj, nullptr);
}

/*
 * Class:     org_rocksdb_RestoreBackupableDB
 * Method:    newRestoreBackupableDB
 * Signature: (J)V
 */
void Java_org_rocksdb_RestoreBackupableDB_newRestoreBackupableDB(JNIEnv* env,
    jobject jobj, jlong jopt_handle) {
  auto opt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jopt_handle);
  auto rdb = new rocksdb::RestoreBackupableDB(rocksdb::Env::Default(), *opt);
  rocksdb::RestoreBackupableDBJni::setHandle(env, jobj, rdb);
}

/*
 * Class:     org_rocksdb_RestoreBackupableDB
 * Method:    restoreDBFromBackup0
 * Signature: (JJLjava/lang/String;Ljava/lang/String;J)V
 */
void Java_org_rocksdb_RestoreBackupableDB_restoreDBFromBackup0(JNIEnv* env,
    jobject jobj, jlong jhandle, jlong jbackup_id, jstring jdb_dir,
    jstring jwal_dir, jlong jopt_handle) {
  auto opt = reinterpret_cast<rocksdb::RestoreOptions*>(jopt_handle);
  
  const char* cdb_dir = env->GetStringUTFChars(jdb_dir, 0);
  const char* cwal_dir = env->GetStringUTFChars(jwal_dir, 0);
  
  auto rdb = reinterpret_cast<rocksdb::RestoreBackupableDB*>(jhandle);
  rocksdb::Status s =
      rdb->RestoreDBFromBackup(jbackup_id, cdb_dir, cwal_dir, *opt);
  
  env->ReleaseStringUTFChars(jdb_dir, cdb_dir);
  env->ReleaseStringUTFChars(jwal_dir, cwal_dir);
  
  if(!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_RestoreBackupableDB
 * Method:    restoreDBFromLatestBackup0
 * Signature: (JLjava/lang/String;Ljava/lang/String;J)V
 */
void Java_org_rocksdb_RestoreBackupableDB_restoreDBFromLatestBackup0(
    JNIEnv* env, jobject jobj, jlong jhandle, jstring jdb_dir, jstring jwal_dir,
    jlong jopt_handle) {
  auto opt = reinterpret_cast<rocksdb::RestoreOptions*>(jopt_handle);
  
  const char* cdb_dir = env->GetStringUTFChars(jdb_dir, 0);
  const char* cwal_dir = env->GetStringUTFChars(jwal_dir, 0);
  
  auto rdb = reinterpret_cast<rocksdb::RestoreBackupableDB*>(jhandle);
  rocksdb::Status s =
      rdb->RestoreDBFromLatestBackup(cdb_dir, cwal_dir, *opt);
  
  env->ReleaseStringUTFChars(jdb_dir, cdb_dir);
  env->ReleaseStringUTFChars(jwal_dir, cwal_dir);
  
  if(!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_RestoreBackupableDB
 * Method:    purgeOldBackups0
 * Signature: (JI)V
 */
void Java_org_rocksdb_RestoreBackupableDB_purgeOldBackups0(JNIEnv* env,
    jobject jobj, jlong jhandle, jint jnum_backups_to_keep) {
  auto rdb = reinterpret_cast<rocksdb::RestoreBackupableDB*>(jhandle);
  rocksdb::Status s = rdb->PurgeOldBackups(jnum_backups_to_keep);
  
  if(!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_RestoreBackupableDB
 * Method:    deleteBackup0
 * Signature: (JJ)V
 */
void Java_org_rocksdb_RestoreBackupableDB_deleteBackup0(JNIEnv* env,
    jobject jobj, jlong jhandle, jlong jbackup_id) {
  auto rdb = reinterpret_cast<rocksdb::RestoreBackupableDB*>(jhandle);
  rocksdb::Status s = rdb->DeleteBackup(jbackup_id);
  
  if(!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_RestoreBackupableDB
 * Method:    dispose
 * Signature: (J)V
 */
void Java_org_rocksdb_RestoreBackupableDB_dispose(JNIEnv* env, jobject jobj,
    jlong jhandle) {
  auto ropt = reinterpret_cast<rocksdb::RestoreBackupableDB*>(jhandle);
  assert(ropt);
  delete ropt;

  rocksdb::RestoreBackupableDBJni::setHandle(env, jobj, nullptr);
}