all分组
使用广播分组。
builder.setBolt("split-bolt", new SplitBolt(),2).allGrouping("wcspout").setNumTasks(2);
package com.mao.storm.group.all;
import org.apache.storm.spout.SpoutOutputCollector;
import org.apache.storm.task.TopologyContext;
import org.apache.storm.topology.IRichSpout;
import org.apache.storm.topology.OutputFieldsDeclarer;
import org.apache.storm.tuple.Fields;
import org.apache.storm.tuple.Values;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Random;
public class WordCountSpout implements IRichSpout {
private TopologyContext context;
private SpoutOutputCollector collector;
List<String> stats;
private int index = 0;
public void open(Map map, TopologyContext context, SpoutOutputCollector collector) {
//Util.sendToClient(this,"open()");
this.collector = collector;
this.context = context;
stats = new ArrayList<String>();
stats.add("hollo world tom");
stats.add("hollo world tom1");
stats.add("hollo world tom2");
stats.add("hollo world tom3");
}
private Random r = new Random();
public void close() {
}
public void activate() {
}
public void deactivate() {
}
public void nextTuple() {
if (index<3){
String line = stats.get(r.nextInt(4));
System.out.println(this+" : nextTuple() : "+line+" : "+index);
collector.emit(new Values(line),index);
index++;
}
}
/**
* 回调处理
*/
public void ack(Object msgId) {
System.out.println(this+" : ack() : "+msgId);
}
public void fail(Object o) {
}
public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer) {
outputFieldsDeclarer.declare(new Fields("line"));
}
public Map<String, Object> getComponentConfiguration() {
return null;
}
}
package com.mao.storm.group.all;
import com.mao.storm.util.Util;
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 SplitBolt implements IRichBolt {
private TopologyContext context;
private OutputCollector collector;
public void prepare(Map map, TopologyContext context, OutputCollector collector) {
this.context = context;
this.collector = collector;
}
public void execute(Tuple tuple) {
String line = tuple.getString(0);
Util.sendToLocalhost(this,line);
String[] arr = line.split(" ");
for (String s : arr){
collector.emit(new Values(s,1));
}
}
public void cleanup() {
}
public void declareOutputFields(OutputFieldsDeclarer outputFieldsDeclarer) {
outputFieldsDeclarer.declare(new Fields("word","count"));
}
public Map<String, Object> getComponentConfiguration() {
return null;
}
}
package com.mao.storm.group.all;
import org.apache.storm.Config;
import org.apache.storm.LocalCluster;
import org.apache.storm.topology.TopologyBuilder;
/**
* App
*/
public class App {
public static void main(String[] args) throws Exception {
TopologyBuilder builder = new TopologyBuilder();
//设置spout
builder.setSpout("wcSpout",new WordCountSpout()).setNumTasks(2);
//设置creator-Bolt
builder.setBolt("split-bolt",new SplitBolt(),2).allGrouping("wcSpout").setNumTasks(2);
Config config = new Config();
config.setNumWorkers(2);
config.setDebug(true);
LocalCluster cluster = new LocalCluster();
cluster.submitTopology("wc",config,builder.createTopology());
System.out.println("over");
Thread.sleep(20000);
cluster.shutdown();
}
}