| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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 backtype.storm.drpc; |
| |
| import backtype.storm.Config; |
| import backtype.storm.generated.DistributedRPCInvocations; |
| import backtype.storm.generated.AuthorizationException; |
| import backtype.storm.task.OutputCollector; |
| import backtype.storm.task.TopologyContext; |
| import backtype.storm.topology.OutputFieldsDeclarer; |
| import backtype.storm.topology.base.BaseRichBolt; |
| import backtype.storm.tuple.Tuple; |
| import backtype.storm.utils.ServiceRegistry; |
| import backtype.storm.utils.Utils; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| import org.apache.thrift.TException; |
| import org.apache.thrift.transport.TTransportException; |
| import org.json.simple.JSONValue; |
| |
| public class ReturnResults extends BaseRichBolt { |
| // ANY CHANGE TO THIS CODE MUST BE SERIALIZABLE COMPATIBLE OR THERE WILL BE PROBLEMS |
| static final long serialVersionUID = -774882142710631591L; |
| |
| public static final Logger LOG = LoggerFactory.getLogger(ReturnResults.class); |
| OutputCollector _collector; |
| boolean local; |
| Map _conf; |
| Map<List, DRPCInvocationsClient> _clients = new HashMap<List, DRPCInvocationsClient>(); |
| |
| @Override |
| public void prepare(Map stormConf, TopologyContext context, OutputCollector collector) { |
| _conf = stormConf; |
| _collector = collector; |
| local = stormConf.get(Config.STORM_CLUSTER_MODE).equals("local"); |
| } |
| |
| @Override |
| public void execute(Tuple input) { |
| String result = (String) input.getValue(0); |
| String returnInfo = (String) input.getValue(1); |
| // LOG.info("Receive one message, resultInfo:{}, result:{}", returnInfo, result); |
| if (returnInfo != null) { |
| Map retMap = (Map) JSONValue.parse(returnInfo); |
| final String host = (String) retMap.get("host"); |
| final int port = Utils.getInt(retMap.get("port")); |
| String id = (String) retMap.get("id"); |
| DistributedRPCInvocations.Iface client; |
| if (local) { |
| client = (DistributedRPCInvocations.Iface) ServiceRegistry.getService(host); |
| } else { |
| List server = new ArrayList() { |
| { |
| add(host); |
| add(port); |
| } |
| }; |
| |
| if (!_clients.containsKey(server)) { |
| try { |
| _clients.put(server, new DRPCInvocationsClient(_conf, host, port)); |
| } catch (TTransportException ex) { |
| throw new RuntimeException(ex); |
| } |
| } |
| client = _clients.get(server); |
| } |
| |
| try { |
| client.result(id, result); |
| _collector.ack(input); |
| } catch (AuthorizationException aze) { |
| LOG.error("Not authorized to return results to DRPC server", aze); |
| _collector.fail(input); |
| if (client instanceof DRPCInvocationsClient) { |
| try { |
| LOG.info("reconnecting... "); |
| ((DRPCInvocationsClient) client).reconnectClient(); // Blocking call |
| } catch (TException e2) { |
| throw new RuntimeException(e2); |
| } |
| } |
| } catch (TException e) { |
| LOG.error("Failed to return results to DRPC server", e); |
| _collector.fail(input); |
| if (client instanceof DRPCInvocationsClient) { |
| try { |
| LOG.info("reconnecting... "); |
| ((DRPCInvocationsClient) client).reconnectClient(); // Blocking call |
| } catch (TException e2) { |
| throw new RuntimeException(e2); |
| } |
| } |
| } |
| } |
| } |
| |
| @Override |
| public void cleanup() { |
| for (DRPCInvocationsClient c : _clients.values()) { |
| c.close(); |
| } |
| } |
| |
| public void declareOutputFields(OutputFieldsDeclarer declarer) { |
| } |
| } |