/**
 * 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.elasticsearch.bolt;

import java.util.Map;

import org.elasticsearch.client.Client;

import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.base.BaseRichBolt;
import backtype.storm.tuple.Tuple;

import com.alibaba.jstorm.elasticsearch.common.EsConfig;
import com.alibaba.jstorm.elasticsearch.common.StormEsClient;
import com.google.common.base.Preconditions;

public abstract class EsAbstractBolt extends BaseRichBolt {

  private static final long serialVersionUID = 6213594268206022374L;

  protected static Client client;

  protected OutputCollector collector;
  private EsConfig esConfig;

  public EsAbstractBolt(EsConfig esConfig) {
    Preconditions.checkNotNull(esConfig);
    this.esConfig = esConfig;
  }

  @Override
  public void prepare(Map map, TopologyContext topologyContext,
      OutputCollector outputCollector) {
    try {
      this.collector = outputCollector;
      synchronized (EsAbstractBolt.class) {
        if (client == null) {
          client = new StormEsClient(esConfig);
        }
      }
    } catch (Exception e) {
      throw new RuntimeException("unable to initialize EsBolt ", e);
    }
  }

  @Override
  public abstract void execute(Tuple tuple);

  static Client getClient() {
    return EsAbstractBolt.client;
  }

}