content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.jstorm.transactional;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.Map;
  
  import org.rocksdb.InfoLogLevel;
  import org.rocksdb.Options;
  import org.rocksdb.util.SizeUnit;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import backtype.storm.task.TopologyContext;
  
  import com.alibaba.jstorm.cache.RocksDBCache;
  import com.alibaba.jstorm.client.ConfigExtension;
  import com.esotericsoftware.kryo.Kryo;
  import com.esotericsoftware.kryo.io.Input;
  import com.esotericsoftware.kryo.io.Output;
  
  public class RocksDbCacheOperator extends RocksDBCache implements ICacheOperator {
      public static Logger LOG = LoggerFactory.getLogger(RocksDbCacheOperator.class);
  
      private Map stormConf;
  
      private int maxFlushSize;
  
      private Kryo kryo;
      private Output output;
      private Input input;
  
      public RocksDbCacheOperator(TopologyContext context, String cacheDir) {
          this.stormConf = context.getStormConf();
  
          this.maxFlushSize = ConfigExtension.getTransactionCacheBatchFlushSize(stormConf);
  
          Options rocksDbOpt = new Options();
          rocksDbOpt.setCreateMissingColumnFamilies(true).setCreateIfMissing(true);
          long bufferSize =
                  ConfigExtension.getTransactionCacheBlockSize(stormConf) != null ? ConfigExtension.getTransactionCacheBlockSize(stormConf) : (1 * SizeUnit.GB);
          rocksDbOpt.setWriteBufferSize(bufferSize);
          int maxBufferNum = ConfigExtension.getTransactionMaxCacheBlockNum(stormConf) != null ? ConfigExtension.getTransactionMaxCacheBlockNum(stormConf) : 3;
          rocksDbOpt.setMaxWriteBufferNumber(maxBufferNum);
  
          // Config for log of RocksDb
          rocksDbOpt.setMaxLogFileSize(1073741824); // 1G
          rocksDbOpt.setKeepLogFileNum(1);
          rocksDbOpt.setInfoLogLevel(InfoLogLevel.WARN_LEVEL);
          
          try {
              Map<Object, Object> conf = new HashMap<Object, Object>();
              conf.put(ROCKSDB_ROOT_DIR, cacheDir);
              conf.put(ROCKSDB_RESET, true);
              initDir(conf);
              initDb(null, rocksDbOpt);
          } catch (Exception e) {
              throw new RuntimeException(e);
          }
  
          kryo = new Kryo();
          output = new Output(200, 2000000000);
          input = new Input(1);
  
          LOG.info("Finished rocksDb cache init: maxFlushSize={}, bufferSize={}, maxBufferNum={}", maxFlushSize, bufferSize, maxBufferNum);
      }
  
      public int getMaxFlushSize() {
          return maxFlushSize;
      }
  
      @Override 
      protected byte[] serialize(Object obj) { 
          output.clear(); 
          kryo.writeObject(output, obj);
          return output.toBytes(); 
      }
  
      @Override 
      protected Object deserialize(byte[] data) { 
          input.setBuffer(data); 
          return kryo.readObject(input, ArrayList.class); 
      }
  
      public PendingBatch createPendingBatch(long batchId) {
          return new RocksDbPendingBatch(this, batchId);
      }
  }