rocksdb/java/rocksjni/backupablejni.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::BackupableDB and rocksdb::BackupableDBOptions methods
// from Java side.

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

#include "include/org_rocksdb_BackupableDB.h"
#include "include/org_rocksdb_BackupableDBOptions.h"
#include "rocksjni/portal.h"
#include "rocksdb/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) {
  rocksdb::Status s =
      reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->CreateNewBackup(jflag);
  if (!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_BackupableDB
 * Method:    purgeOldBackups
 * Signature: (JI)V
 */
void Java_org_rocksdb_BackupableDB_purgeOldBackups(
    JNIEnv* env, jobject jbdb, jlong jhandle, jint jnumBackupsToKeep) {
  rocksdb::Status s =
      reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->
      PurgeOldBackups(jnumBackupsToKeep);
  if (!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_BackupableDB
 * Method:    deleteBackup0
 * Signature: (JI)V
 */
void Java_org_rocksdb_BackupableDB_deleteBackup0(JNIEnv* env,
    jobject jobj, jlong jhandle, jint jbackup_id) {
  auto rdb = reinterpret_cast<rocksdb::BackupableDB*>(jhandle);
  rocksdb::Status s = rdb->DeleteBackup(jbackup_id);

  if (!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

/*
 * Class:     org_rocksdb_BackupableDB
 * Method:    getBackupInfo
 * Signature: (J)Ljava/util/List;
 */
jobject Java_org_rocksdb_BackupableDB_getBackupInfo(
    JNIEnv* env, jobject jbdb, jlong jhandle) {
  std::vector<rocksdb::BackupInfo> backup_infos;
  reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->
      GetBackupInfo(&backup_infos);
  return rocksdb::BackupInfoListJni::getBackupInfo(env,
      backup_infos);
}

/*
 * Class:     org_rocksdb_BackupableDB
 * Method:    getCorruptedBackups
 * Signature: (J)Ljava/util/List;
 */
jobject Java_org_rocksdb_BackupableDB_getCorruptedBackups(
    JNIEnv* env, jobject jbdb, jlong jhandle) {
  std::vector<rocksdb::BackupID> backup_ids;
  reinterpret_cast<rocksdb::BackupableDB*>(jhandle)->
      GetCorruptedBackups(&backup_ids);

  jclass jclazz = env->FindClass("java/util/ArrayList");
  jmethodID mid = rocksdb::ListJni::getArrayListConstructorMethodId(
      env, jclazz);
  jobject jbackup_id_handle_list = env->NewObject(jclazz, mid,
      backup_ids.size());
  // insert in java list
  for (std::vector<rocksdb::BackupID>::size_type i = 0;
      i != backup_ids.size(); i++) {
    // convert BackupID to Integer
    jclass jIntClazz = env->FindClass("java/lang/Integer");
    jmethodID midLong = env->GetMethodID(jIntClazz, "<init>", "(I)V");
    jobject obj = env->NewObject(jIntClazz, midLong,
        (backup_ids[i]));
    // add Integer to List
    env->CallBooleanMethod(jbackup_id_handle_list,
        rocksdb::ListJni::getListAddMethodId(env), obj);
  }
  return jbackup_id_handle_list;
}

/*
 * Class:     org_rocksdb_BackupableDB
 * Method:    garbageCollect
 * Signature: (J)V
 */
void Java_org_rocksdb_BackupableDB_garbageCollect(JNIEnv* env,
    jobject jobj, jlong jhandle) {
  auto db = reinterpret_cast<rocksdb::BackupableDB*>(jhandle);
  rocksdb::Status s = db->GarbageCollect();

  if (!s.ok()) {
    rocksdb::RocksDBExceptionJni::ThrowNew(env, s);
  }
}

///////////////////////////////////////////////////////////////////////////
// BackupDBOptions

/*
 * Class:     org_rocksdb_BackupableDBOptions
 * Method:    newBackupableDBOptions
 * Signature: (Ljava/lang/String;)V
 */
void Java_org_rocksdb_BackupableDBOptions_newBackupableDBOptions(
    JNIEnv* env, jobject jobj, jstring jpath) {
  const char* cpath = env->GetStringUTFChars(jpath, 0);
  auto bopt = new rocksdb::BackupableDBOptions(cpath);
  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) {
  auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
  return env->NewStringUTF(bopt->backup_dir.c_str());
}

/*
 * Class:     org_rocksdb_BackupableDBOptions
 * Method:    setShareTableFiles
 * Signature: (JZ)V
 */
void Java_org_rocksdb_BackupableDBOptions_setShareTableFiles(
    JNIEnv* env, jobject jobj, jlong jhandle, jboolean flag) {
  auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
  bopt->share_table_files = flag;
}

/*
 * Class:     org_rocksdb_BackupableDBOptions
 * Method:    shareTableFiles
 * Signature: (J)Z
 */
jboolean Java_org_rocksdb_BackupableDBOptions_shareTableFiles(
    JNIEnv* env, jobject jobj, jlong jhandle) {
  auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
  return bopt->share_table_files;
}

/*
 * Class:     org_rocksdb_BackupableDBOptions
 * Method:    setSync
 * Signature: (JZ)V
 */
void Java_org_rocksdb_BackupableDBOptions_setSync(
    JNIEnv* env, jobject jobj, jlong jhandle, jboolean flag) {
  auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
  bopt->sync = flag;
}

/*
 * Class:     org_rocksdb_BackupableDBOptions
 * Method:    sync
 * Signature: (J)Z
 */
jboolean Java_org_rocksdb_BackupableDBOptions_sync(
    JNIEnv* env, jobject jobj, jlong jhandle) {
  auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
  return bopt->sync;
}

/*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    setDestroyOldData
  * Signature: (JZ)V
  */
 void Java_org_rocksdb_BackupableDBOptions_setDestroyOldData(
     JNIEnv* env, jobject jobj, jlong jhandle, jboolean flag) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   bopt->destroy_old_data = flag;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    destroyOldData
  * Signature: (J)Z
  */
 jboolean Java_org_rocksdb_BackupableDBOptions_destroyOldData(
     JNIEnv* env, jobject jobj, jlong jhandle) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   return bopt->destroy_old_data;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    setBackupLogFiles
  * Signature: (JZ)V
  */
 void Java_org_rocksdb_BackupableDBOptions_setBackupLogFiles(
     JNIEnv* env, jobject jobj, jlong jhandle, jboolean flag) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   bopt->backup_log_files = flag;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    backupLogFiles
  * Signature: (J)Z
  */
 jboolean Java_org_rocksdb_BackupableDBOptions_backupLogFiles(
     JNIEnv* env, jobject jobj, jlong jhandle) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   return bopt->backup_log_files;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    setBackupRateLimit
  * Signature: (JJ)V
  */
 void Java_org_rocksdb_BackupableDBOptions_setBackupRateLimit(
     JNIEnv* env, jobject jobj, jlong jhandle, jlong jbackup_rate_limit) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   bopt->backup_rate_limit = jbackup_rate_limit;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    backupRateLimit
  * Signature: (J)J
  */
 jlong Java_org_rocksdb_BackupableDBOptions_backupRateLimit(
     JNIEnv* env, jobject jobj, jlong jhandle) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   return bopt->backup_rate_limit;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    setRestoreRateLimit
  * Signature: (JJ)V
  */
 void Java_org_rocksdb_BackupableDBOptions_setRestoreRateLimit(
     JNIEnv* env, jobject jobj, jlong jhandle, jlong jrestore_rate_limit) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   bopt->restore_rate_limit = jrestore_rate_limit;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    restoreRateLimit
  * Signature: (J)J
  */
 jlong Java_org_rocksdb_BackupableDBOptions_restoreRateLimit(
     JNIEnv* env, jobject jobj, jlong jhandle) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   return bopt->restore_rate_limit;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    setShareFilesWithChecksum
  * Signature: (JZ)V
  */
 void Java_org_rocksdb_BackupableDBOptions_setShareFilesWithChecksum(
     JNIEnv* env, jobject jobj, jlong jhandle, jboolean flag) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   bopt->share_files_with_checksum = flag;
 }

 /*
  * Class:     org_rocksdb_BackupableDBOptions
  * Method:    shareFilesWithChecksum
  * Signature: (J)Z
  */
 jboolean Java_org_rocksdb_BackupableDBOptions_shareFilesWithChecksum(
     JNIEnv* env, jobject jobj, jlong jhandle) {
   auto bopt = reinterpret_cast<rocksdb::BackupableDBOptions*>(jhandle);
   return bopt->share_files_with_checksum;
 }

/*
 * 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);
}