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[英]what is the working directory for jar laucher in apache storm topology jar
[英]Storm Topology not working
我是新手,但是仍然在本地計算機上配置了Storm。 我做了一個日食項目,並遵循了一個來自互聯網的簡單示例。 現在我的拓撲已提交,但無法正常工作。
是否提交拓撲? 是的,它已經成功提交,因為我可以在ui界面上看到它。
我的拓撲的工作是僅打印一個質數。 但是它沒有打印出來。
我提供了以下代碼:
壺嘴類:
public class NumberSpout extends BaseRichSpout
{
private SpoutOutputCollector collector;
private static final Logger LOGGER = Logger.getLogger(SpoutOutputCollector.class);
private static int currentNumber = 1;
@Override
public void open( Map conf, TopologyContext context, SpoutOutputCollector collector )
{
this.collector = collector;
}
@Override
public void nextTuple()
{
// Emit the next number
LOGGER.info("Coming in spout tuble method");
collector.emit( new Values( new Integer( currentNumber++ ) ) );
}
@Override
public void ack(Object id)
{
}
@Override
public void fail(Object id)
{
}
@Override
public void declareOutputFields(OutputFieldsDeclarer declarer)
{
declarer.declare( new Fields( "number" ) );
}
}
螺栓類別:
public class PrimeNumberBolt extends BaseRichBolt
{ private static final Logger LOGGER = Logger.getLogger(PrimeNumberBolt.class);
private OutputCollector collector;
public void prepare( Map conf, TopologyContext context, OutputCollector collector )
{
this.collector = collector;
}
public void execute( Tuple tuple )
{
int number = tuple.getInteger( 0 );
if( isPrime( number) )
{
LOGGER.info("Prime number printed is: )" +number);
System.out.println( number );
}
collector.ack( tuple );
}
public void declareOutputFields( OutputFieldsDeclarer declarer )
{
declarer.declare( new Fields( "number" ) );
}
private boolean isPrime( int n )
{
if( n == 1 || n == 2 || n == 3 )
{
return true;
}
// Is n an even number?
if( n % 2 == 0 )
{
return false;
}
//if not, then just check the odds
for( int i=3; i*i<=n; i+=2 )
{
if( n % i == 0)
{
return false;
}
}
return true;
}
}
拓撲類別:
public class PrimeNumberTopology
{
public static void main(String[] args)
{
TopologyBuilder builder = new TopologyBuilder();
builder.setSpout( "spout", new NumberSpout(),1 );
builder.setBolt( "prime", new PrimeNumberBolt(),1 )
.shuffleGrouping("spout");
Config conf = new Config();
conf.put(Config.NIMBUS_HOST, "127.0.0.1");
conf.setDebug(true);
Map storm_conf = Utils.readStormConfig();
storm_conf.put("nimbus.host", "127.0.0.1");
Client client = NimbusClient.getConfiguredClient(storm_conf)
.getClient();
String inputJar = "/home/jamil/Downloads/storm-twitter-word-count-master/target/storm-test-1.0-SNAPSHOT.jar";
NimbusClient nimbus = new NimbusClient("127.0.0.1",6627);
// upload topology jar to Cluster using StormSubmitter
String uploadedJarLocation = StormSubmitter.submitJar(storm_conf,
inputJar);
try {
String jsonConf = JSONValue.toJSONString(storm_conf);
nimbus.getClient().submitTopology("newtesttopology",
uploadedJarLocation, jsonConf, builder.createTopology());
} catch (AlreadyAliveException ae) {
ae.printStackTrace();
} catch (InvalidTopologyException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (TException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
現在我想問一問為什么不打印? 還是為什么不將其寫入日志文件?
另外:我正在從Eclipse提交拓撲。
除了@Thomas Jungblut
所說的(關於log4j配置)並假設它是拓撲的完整源代碼之外,還請查看nextTuple()
方法。
您的噴口只是發出一個值而已。 您很有可能會錯過控制台中發出的輸出,因為它被埋在大量其他日志記錄輸出中。
您確定要只發出一個值嗎?
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