Question

在我的基于Storm的应用程序中，我需要定期查询oracle表所以我想使用Tick tuple of storm。但它没有给出正确的结果，并且滴答元组不会产生。

我的风暴版本是1.0.1.2.5.3.0-37

我试过如下，

在bolt中添加了getComponentConfiguration方法http://www.michael-noll.com/blog/2013/01/18/implementing-real-time-trending-topics-in-storm/链接，但没有生成tick元组。
所以我更改了代码，并使用拓扑中的Config生成tick元组。我引用https://www.safaribooksonline.com/blog/2014/01/06/multi-threading-storm/链接，但这里我只得到一次tick元组。

下面是我的带螺栓的刻度元组代码，

public class TickTupleBolt implements IRichBolt{

private OutputCollector collector = null;
private static final long serialVersionUID = 1L;
private static final Logger LOG = LoggerFactory.getLogger(TickTupleBolt.class);

public void prepare(Map stormConf, TopologyContext context,OutputCollector collector) {
    this.collector = collector;     
}

public void execute(Tuple tuple) {
    LOG.info("Start of TickTupleBolt.execute");     
     try {
            if (isTickTuple(tuple)) {
            //if(tuple.getSourceStreamId().equals("__tick")){
                LOG.info("**got tick tuple");
            }else{
                LOG.info("not got tick tuple");
            }

        } catch (Exception e) {
            LOG.error("Bolt execute error: {}", e);
            collector.reportError(e);
        }       
     LOG.info("End of TickTupleBolt.execute");

}

public void cleanup() {
    // TODO Auto-generated method stub

}

public void declareOutputFields(OutputFieldsDeclarer declarer) {
    // TODO Auto-generated method stub

}

public Map<String, Object> getComponentConfiguration() {
    // configure how often a tick tuple will be sent to our bolt
    Map<String, Object> conf = new HashMap<String, Object>();
    conf.put(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS, 1);
    return conf;
}

protected boolean isTickTuple(Tuple tuple) {
    return tuple.getSourceComponent().equals(Constants.SYSTEM_COMPONENT_ID)
        && tuple.getSourceStreamId().equals(Constants.SYSTEM_TICK_STREAM_ID);
}


}

我有一个链接Tick Tuple not functioning in apache storm 0.9.4，但没有答案。

任何身体也可以让我知道，

如何在Storm中实现tick元组
还有其他办法（除了嘀嗒嘀嗒）在风暴中定期工作

更新 - 拓扑代码

我的拓扑构建器，

public class Topology {

private static final Logger LOG = LoggerFactory.getLogger(Topology.class);

public static StormTopology buildTopology() {
    TopologyBuilder builder = new TopologyBuilder();

    builder.setSpout("tickspout", new TickTupleSpout());
    builder.setBolt("tickbolt", new TickTupleBolt()).shuffleGrouping("tickspout");

    return builder.createTopology();
}

public static void main(String[] args) throws AlreadyAliveException, InvalidTopologyException, AuthorizationException {
    Config conf = new Config();
    //conf.put(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS, 5);//tried it also
    conf.setDebug(true);
    //conf.setNumWorkers(2);
    StormSubmitter.submitTopology(args[0], conf, buildTopology());
}

}

更新 - 代码

public class TickTupleSpout extends BaseRichSpout{

private static final Logger LOG = LoggerFactory.getLogger(TickTupleSpout.class);
private static final long serialVersionUID = 1L;
private SpoutOutputCollector collector;

public TickTupleSpout() {

}

public void open(Map conf, TopologyContext context,
        SpoutOutputCollector collector) {
    // TODO Auto-generated method stub
    LOG.info("Start of TickTupleSpout.Open");
    this.collector = collector;
    LOG.info("End of TickTupleSpout.Open");
}

public void nextTuple() {
    LOG.info("Start of TickTupleSpout.nextTuple");
    this.collector.emit(new Values("0");//just send dummy value
    LOG.info("End of TickTupleSpout.nextTuple");

}

public void declareOutputFields(OutputFieldsDeclarer declarer) {
    declarer.declare(new Fields("breachdata")); 
}

//public Map<String, Object> getComponentConfiguration() {
      //Config conf = new Config();
      //int tickFrequencyInSeconds = 5;
      //conf.put(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS, tickFrequencyInSeconds);
      //return conf;
//}

}

感谢。

Apache风暴：tick元组不起作用

0 个答案: