heron/storm/src/java/org/apache/storm/topology/BasicBoltExecutor.java

// Copyright 2016 Twitter. All rights reserved.
//
// Licensed 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 org.apache.storm.topology;

import java.util.Map;

import org.apache.storm.task.OutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.tuple.Tuple;

public class BasicBoltExecutor implements IRichBolt {
  private static final long serialVersionUID = 235217339000923019L;
  private IBasicBolt delegate;
  private transient BasicOutputCollector collector;

  public BasicBoltExecutor(IBasicBolt bolt) {
    this.delegate = bolt;
  }

  @Override
  public void declareOutputFields(OutputFieldsDeclarer declarer) {
    delegate.declareOutputFields(declarer);
  }

  @Override
  public void prepare(Map<String, Object> stormConf,
                      TopologyContext context,
                      OutputCollector newCollector) {
    delegate.prepare(stormConf, context);
    this.collector = new BasicOutputCollector(newCollector);
  }

  @Override
  public void execute(Tuple input) {
    this.collector.setContext(input);
    try {
      delegate.execute(input, collector);
      this.collector.getOutputter().ack(input);
    } catch (FailedException e) {
      if (e instanceof ReportedFailedException) {
        this.collector.reportError(e);
      }
      this.collector.getOutputter().fail(input);
    }
  }

  @Override
  public void cleanup() {
    delegate.cleanup();
  }

  @Override
  public Map<String, Object> getComponentConfiguration() {
    return delegate.getComponentConfiguration();
  }
}