Source code

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.runtime.common.launch;
020
021import com.google.protobuf.GeneratedMessage;
022import com.google.protobuf.InvalidProtocolBufferException;
023import org.apache.reef.annotations.Provided;
024import org.apache.reef.annotations.audience.ClientSide;
025import org.apache.reef.annotations.audience.DriverSide;
026import org.apache.reef.annotations.audience.EvaluatorSide;
027import org.apache.reef.annotations.audience.Private;
028import org.apache.reef.proto.ClientRuntimeProtocol;
029import org.apache.reef.proto.EvaluatorRuntimeProtocol;
030import org.apache.reef.proto.REEFProtocol;
031import org.apache.reef.proto.ReefServiceProtos;
032import org.apache.reef.wake.remote.Codec;
033
034import javax.inject.Inject;
035
036/**
037 * Codec for REEF's control flow messages.
038 */
039@Private
040@Provided
041@ClientSide
042@DriverSide
043@EvaluatorSide
044public final class REEFMessageCodec implements Codec<GeneratedMessage> {
045
046
047  @Inject
048  private REEFMessageCodec() {
049  }
050
051  @Override
052  public GeneratedMessage decode(final byte[] bytes) {
053    try {
054      final REEFProtocol.REEFMessage message = REEFProtocol.REEFMessage.parseFrom(bytes);
055      if (message.hasJobControl()) {
056        return message.getJobControl();
057      } else if (message.hasRuntimeError()) {
058        return message.getRuntimeError();
059      } else if (message.hasJobStatus()) {
060        return message.getJobStatus();
061      } else if (message.hasEvaluatorControl()) {
062        return message.getEvaluatorControl();
063      } else if (message.hasEvaluatorHeartBeat()) {
064        return message.getEvaluatorHeartBeat();
065      }
066      throw new RuntimeException("Unable to decode a message: " + message.toString());
067    } catch (final InvalidProtocolBufferException e) {
068      throw new RuntimeException("Unable to decode a message", e);
069    }
070  }
071
072  @Override
073  public byte[] encode(final GeneratedMessage msg) {
074    final REEFProtocol.REEFMessage.Builder message = REEFProtocol.REEFMessage.newBuilder();
075
076    if (msg instanceof ClientRuntimeProtocol.JobControlProto) {
077      message.setJobControl((ClientRuntimeProtocol.JobControlProto) msg);
078    } else if (msg instanceof ReefServiceProtos.RuntimeErrorProto) {
079      message.setRuntimeError((ReefServiceProtos.RuntimeErrorProto) msg);
080    } else if (msg instanceof ReefServiceProtos.JobStatusProto) {
081      message.setJobStatus((ReefServiceProtos.JobStatusProto) msg);
082    } else if (msg instanceof EvaluatorRuntimeProtocol.EvaluatorControlProto) {
083      message.setEvaluatorControl((EvaluatorRuntimeProtocol.EvaluatorControlProto) msg);
084    } else if (msg instanceof EvaluatorRuntimeProtocol.EvaluatorHeartbeatProto) {
085      message.setEvaluatorHeartBeat((EvaluatorRuntimeProtocol.EvaluatorHeartbeatProto) msg);
086    } else {
087      throw new RuntimeException("Unable to serialize: " + msg);
088    }
089
090    return message.build().toByteArray();
091  }
092}