/**
* Licensed to DigitalPebble Ltd under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* DigitalPebble licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.digitalpebble.storm.crawler;
import backtype.storm.topology.TopologyBuilder;
import backtype.storm.tuple.Fields;
import com.digitalpebble.storm.crawler.bolt.FetcherBolt;
import com.digitalpebble.storm.crawler.bolt.IndexerBolt;
import com.digitalpebble.storm.crawler.bolt.ParserBolt;
import com.digitalpebble.storm.crawler.bolt.URLPartitionerBolt;
import com.digitalpebble.storm.crawler.spout.RandomURLSpout;
import com.digitalpebble.storm.metrics.DebugMetricConsumer;
/**
* Dummy topology to play with the spouts and bolts
*/
public class CrawlTopology extends ConfigurableTopology {
public static void main(String[] args) throws Exception {
ConfigurableTopology.start(new CrawlTopology(), args);
}
@Override
protected int run(String[] args) {
TopologyBuilder builder = new TopologyBuilder();
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");
conf.registerMetricsConsumer(DebugMetricConsumer.class);
return submit("crawl", conf, builder);
}
}