addTask2Worker(mapWorker_2, new MapReducePageURLMiningTask("http://www.xinhuanet.com"));
addTask2Worker(mapWorker_3, new MapReducePageURLMiningTask("http://www.zol.com.cn"));
addTask2Worker(mapWorker_4, new MapReducePageURLMiningTask("http://www.sina.com.cn/"));
// bind mapper to reduer
Map2ReduceConnector connector = new Map2ReduceConnector(Arrays.asList(reduceWorker_1));
mapWorker_1.addListener(connector);
mapWorker_2.addListener(connector);
mapWorker_3.addListener(connector);
mapWorker_4.addListener(connector);