PrepareBatchBolt.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 backtype.storm.testing;

import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.topology.base.BaseBasicBolt;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.utils.Utils;
import java.util.ArrayList;
import java.util.List;

public class PrepareBatchBolt extends BaseBasicBolt {
    Fields _outFields;

    public PrepareBatchBolt(Fields outFields) {
        _outFields = outFields;
    }

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

    @Override
    public void execute(Tuple input, BasicOutputCollector collector) {
        long id = Utils.secureRandomLong();
        List<Object> toEmit = new ArrayList<>();
        toEmit.add(id);
        toEmit.addAll(input.getValues());
        collector.emit(toEmit);
    }

}