TopologyBuilder builder = new TopologyBuilder(); builder.setSpout("1", new TestWordSpout(true), 5); builder.setSpout("2", new TestWordSpout(true), 3); builder.setBolt("3", new TestWordCounter(), 3) .fieldsGrouping("1", new Fields("word")) .fieldsGrouping("2", new Fields("word")); builder.setBolt("4", new TestGlobalCount()) .globalGrouping("1"); Map conf = new HashMap(); conf.put(Config.TOPOLOGY_WORKERS, 4); StormSubmitter.submitTopology("mytopology", conf, builder.createTopology()); Running the exact same topology in local mode (in process), and configuring it to log all tuples emitted, looks like the following. Note that it lets the topology run for 10 seconds before shutting down the local cluster. TopologyBuilder builder = new TopologyBuilder(); builder.setSpout("1", new TestWordSpout(true), 5); builder.setSpout("2", new TestWordSpout(true), 3); builder.setBolt("3", new TestWordCounter(), 3) .fieldsGrouping("1", new Fields("word")) .fieldsGrouping("2", new Fields("word")); builder.setBolt("4", new TestGlobalCount()) .globalGrouping("1"); Map conf = new HashMap(); conf.put(Config.TOPOLOGY_WORKERS, 4); conf.put(Config.TOPOLOGY_DEBUG, true); LocalCluster cluster = new LocalCluster(); cluster.submitTopology("mytopology", conf, builder.createTopology()); Utils.sleep(10000); cluster.shutdown(); The pattern for TopologyBuilder is to map component ids to components using the setSpout and setBolt methods. Those methods return objects that are then used to declare the inputs for that component.
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