builder.setSpout("spout", new RandomURLSpout());
builder.setBolt("partitioner", new URLPartitionerBolt())
.shuffleGrouping("spout");
builder.setBolt("fetch", new FetcherBolt()).fieldsGrouping(
"partitioner", new Fields("key"));
builder.setBolt("parse", new ParserBolt()).shuffleGrouping("fetch");
builder.setBolt("index", new IndexerBolt()).shuffleGrouping("parse");