package com.alipay.dw.jstorm.example.batch;
import java.util.Map;
import java.util.Random;
import org.apache.log4j.Logger;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.BasicOutputCollector;
import backtype.storm.topology.FailedException;
import backtype.storm.topology.OutputFieldsDeclarer;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import backtype.storm.tuple.Values;
import com.alibaba.jstorm.batch.BatchId;
import com.alibaba.jstorm.batch.IBatchSpout;
public class SimpleSpout implements IBatchSpout {
private static final Logger LOG = Logger.getLogger(SimpleSpout.class);
private Random rand;
@Override
public void prepare(Map stormConf, TopologyContext context) {
rand = new Random();
rand.setSeed(System.currentTimeMillis());
}
private int batchSize = 100;
@Override
public void execute(Tuple input, BasicOutputCollector collector) {
BatchId batchId = (BatchId)input.getValue(0);
for (int i = 0; i < batchSize; i++) {
long value = rand.nextInt(10);
collector.emit(new Values(batchId, value));
}
}
@Override
public void cleanup() {
}
@Override
public void declareOutputFields(OutputFieldsDeclarer declarer) {
declarer.declare(new Fields("BatchId", "Value"));
}
@Override
public Map<String, Object> getComponentConfiguration() {
return null;
}
@Override
public byte[] commit(BatchId id) throws FailedException {
LOG.info("Receive BatchId " + id);
return null;
}
@Override
public void revert(BatchId id, byte[] commitResult) {
LOG.info("Receive BatchId " + id);
}
}