BasicTransactionSpout.java

/**
 * 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.spout;

import java.util.Map;

import backtype.storm.spout.SpoutOutputCollector;
import backtype.storm.task.TopologyContext;

public class BasicTransactionSpout extends TransactionSpout {
    public BasicTransactionSpout(ITransactionSpoutExecutor spoutExecutor) {
        super(spoutExecutor);
    }

    @Override
    public void open(Map conf, TopologyContext context, SpoutOutputCollector collector) {
        super.open(conf, context, collector);
        /**
         *  For backward compatibility to release 2.2.*, the conversion of output collector to 
         *  BasicSpoutOutputCollector is still kept here.
         */
        if (spoutExecutor instanceof BasicTransactionSpoutExecutor) {
            ((BasicTransactionSpoutExecutor) spoutExecutor).open(conf, context, new BasicSpoutOutputCollector(outputCollector));
        } else if (spoutExecutor instanceof IBasicTransactionSpoutExecutor) {
            ((IBasicTransactionSpoutExecutor) spoutExecutor).open(conf, context, new BasicSpoutOutputCollector(outputCollector));
        } else {
            spoutExecutor.open(conf, context, new SpoutOutputCollector(outputCollector));
        }
    }
}