/*
* 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 org.apache.flink.storm.exclamation.operators;
import org.apache.storm.task.OutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.IRichBolt;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Tuple;
import org.apache.storm.tuple.Values;
import java.util.Map;
public class ExclamationBolt implements IRichBolt {
private final static long serialVersionUID = -6364882114201311380L;
public final static String EXCLAMATION_COUNT = "exclamation.count";
private OutputCollector collector;
private String exclamation;
@SuppressWarnings("rawtypes")
@Override
public void prepare(Map conf, TopologyContext context, OutputCollector collector) {
this.collector = collector;
Object count = conf.get(EXCLAMATION_COUNT);
if (count != null) {
int exclamationNum = (Integer) count;
StringBuilder builder = new StringBuilder();
for (int index = 0; index < exclamationNum; ++index) {
builder.append('!');
}
this.exclamation = builder.toString();
} else {
this.exclamation = "!";
}
}
@Override
public void cleanup() {
}
@Override
public void execute(Tuple tuple) {
collector.emit(tuple, new Values(tuple.getString(0) + this.exclamation));
}
@Override
public void declareOutputFields(OutputFieldsDeclarer declarer) {
declarer.declare(new Fields("word"));
}
@Override
public Map<String, Object> getComponentConfiguration() {
return null;
}
}