001/* 002 * Licensed to the Apache Software Foundation (ASF) under one 003 * or more contributor license agreements. See the NOTICE file 004 * distributed with this work for additional information 005 * regarding copyright ownership. The ASF licenses this file 006 * to you under the Apache License, Version 2.0 (the 007 * "License"); you may not use this file except in compliance 008 * with the License. You may obtain a copy of the License at 009 * 010 * http://www.apache.org/licenses/LICENSE-2.0 011 * 012 * Unless required by applicable law or agreed to in writing, 013 * software distributed under the License is distributed on an 014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 015 * KIND, either express or implied. See the License for the 016 * specific language governing permissions and limitations 017 * under the License. 018 */ 019package org.apache.reef.io.network.group.impl.operators; 020 021import org.apache.reef.driver.task.TaskConfigurationOptions; 022import org.apache.reef.exception.evaluator.NetworkException; 023import org.apache.reef.io.network.exception.ParentDeadException; 024import org.apache.reef.io.network.group.api.operators.Gather; 025import org.apache.reef.io.network.group.api.task.CommGroupNetworkHandler; 026import org.apache.reef.io.network.group.api.task.CommunicationGroupServiceClient; 027import org.apache.reef.io.network.group.api.task.OperatorTopology; 028import org.apache.reef.io.network.group.impl.GroupCommunicationMessage; 029import org.apache.reef.io.network.group.impl.config.parameters.*; 030import org.apache.reef.io.network.group.impl.task.OperatorTopologyImpl; 031import org.apache.reef.io.network.group.impl.utils.Utils; 032import org.apache.reef.io.network.impl.NetworkService; 033import org.apache.reef.io.network.proto.ReefNetworkGroupCommProtos; 034import org.apache.reef.io.serialization.Codec; 035import org.apache.reef.tang.annotations.Name; 036import org.apache.reef.tang.annotations.Parameter; 037import org.apache.reef.wake.EventHandler; 038 039import javax.inject.Inject; 040import java.io.ByteArrayOutputStream; 041import java.io.DataOutputStream; 042import java.io.IOException; 043import java.util.concurrent.atomic.AtomicBoolean; 044import java.util.logging.Logger; 045 046public class GatherSender<T> implements Gather.Sender<T>, EventHandler<GroupCommunicationMessage> { 047 048 private static final Logger LOG = Logger.getLogger(GatherSender.class.getName()); 049 050 private final Class<? extends Name<String>> groupName; 051 private final Class<? extends Name<String>> operName; 052 private final Codec<T> dataCodec; 053 private final NetworkService<GroupCommunicationMessage> netService; 054 private final OperatorTopology topology; 055 private final CommunicationGroupServiceClient commGroupClient; 056 private final AtomicBoolean init = new AtomicBoolean(false); 057 private final int version; 058 059 @Inject 060 public GatherSender(@Parameter(CommunicationGroupName.class) final String groupName, 061 @Parameter(OperatorName.class) final String operName, 062 @Parameter(TaskConfigurationOptions.Identifier.class) final String selfId, 063 @Parameter(DataCodec.class) final Codec<T> dataCodec, 064 @Parameter(DriverIdentifierGroupComm.class) final String driverId, 065 @Parameter(TaskVersion.class) final int version, 066 final CommGroupNetworkHandler commGroupNetworkHandler, 067 final NetworkService<GroupCommunicationMessage> netService, 068 final CommunicationGroupServiceClient commGroupClient) { 069 LOG.finest(operName + "has CommGroupHandler-" + commGroupNetworkHandler.toString()); 070 this.version = version; 071 this.groupName = Utils.getClass(groupName); 072 this.operName = Utils.getClass(operName); 073 this.dataCodec = dataCodec; 074 this.netService = netService; 075 this.topology = new OperatorTopologyImpl(this.groupName, this.operName, 076 selfId, driverId, new Sender(netService), version); 077 this.commGroupClient = commGroupClient; 078 commGroupNetworkHandler.register(this.operName, this); 079 } 080 081 @Override 082 public int getVersion() { 083 return version; 084 } 085 086 @Override 087 public void initialize() throws ParentDeadException { 088 topology.initialize(); 089 } 090 091 @Override 092 public Class<? extends Name<String>> getOperName() { 093 return operName; 094 } 095 096 @Override 097 public Class<? extends Name<String>> getGroupName() { 098 return groupName; 099 } 100 101 @Override 102 public String toString() { 103 final StringBuilder sb = new StringBuilder("GatherSender:") 104 .append(Utils.simpleName(groupName)) 105 .append(":") 106 .append(Utils.simpleName(operName)) 107 .append(":") 108 .append(version); 109 return sb.toString(); 110 } 111 112 @Override 113 public void onNext(final GroupCommunicationMessage msg) { 114 topology.handle(msg); 115 } 116 117 @Override 118 public void send(final T myData) throws NetworkException, InterruptedException { 119 LOG.entering("GatherSender", "send", myData); 120 // I am an intermediate node or a leaf. 121 LOG.fine("I am " + this); 122 123 if (init.compareAndSet(false, true)) { 124 LOG.fine(this + " Communication group initializing."); 125 commGroupClient.initialize(); 126 LOG.fine(this + " Communication group initialized."); 127 } 128 129 try { 130 LOG.finest(this + " Waiting for children."); 131 final byte[] gatheredData = topology.recvFromChildren(); 132 final byte[] encodedMyData = dataCodec.encode(myData); 133 134 try (final ByteArrayOutputStream bstream = new ByteArrayOutputStream(); 135 final DataOutputStream dstream = new DataOutputStream(bstream)) { 136 dstream.writeUTF(netService.getMyId().toString()); 137 dstream.writeInt(encodedMyData.length); 138 dstream.write(encodedMyData); 139 dstream.write(gatheredData); 140 final byte[] mergedData = bstream.toByteArray(); 141 142 LOG.fine(this + " Sending merged value to parent."); 143 topology.sendToParent(mergedData, ReefNetworkGroupCommProtos.GroupCommMessage.Type.Gather); 144 } 145 } catch (final ParentDeadException e) { 146 throw new RuntimeException("ParentDeadException", e); 147 } catch (final IOException e) { 148 throw new RuntimeException("IOException", e); 149 } 150 LOG.exiting("GatherSender", "send"); 151 } 152}