| package backtype.storm.drpc; |
| |
| import backtype.storm.task.OutputCollector; |
| import backtype.storm.task.TopologyContext; |
| import backtype.storm.topology.IRichBolt; |
| import backtype.storm.topology.OutputFieldsDeclarer; |
| import backtype.storm.tuple.Tuple; |
| import backtype.storm.utils.DRPCClient; |
| import java.util.Map; |
| import org.apache.thrift.TException; |
| import org.json.simple.JSONValue; |
| |
| |
| public class ReturnResults implements IRichBolt { |
| |
| OutputCollector _collector; |
| |
| public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) { |
| _collector = collector; |
| } |
| |
| public void execute(Tuple input) { |
| String result = (String) input.getValue(0); |
| String returnInfo = (String) input.getValue(1); |
| if(returnInfo!=null) { |
| Map retMap = (Map) JSONValue.parse(returnInfo); |
| String ip = (String) retMap.get("ip"); |
| Long port = (Long) retMap.get("port"); |
| String id = (String) retMap.get("id"); |
| try { |
| DRPCClient client = new DRPCClient(ip, (int) port.longValue()); |
| client.result(id, result); |
| client.close(); |
| _collector.ack(input); |
| } catch(TException e) { |
| _collector.fail(input); |
| } |
| } |
| } |
| |
| public void cleanup() { |
| |
| } |
| |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| } |
| |
| } |