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.wake.remote.impl; 020 021import com.google.protobuf.ByteString; 022import org.apache.reef.wake.remote.Encoder; 023import org.apache.reef.wake.remote.exception.RemoteRuntimeException; 024import org.apache.reef.wake.remote.proto.WakeRemoteProtos.WakeMessagePBuf; 025 026/** 027 * Remote event encoder using the WakeMessage protocol buffer. 028 * 029 * @param <T> type 030 */ 031public class RemoteEventEncoder<T> implements Encoder<RemoteEvent<T>> { 032 033 private final Encoder<T> encoder; 034 035 /** 036 * Constructs a remote event encoder. 037 * 038 * @param encoder the encoder of the event 039 */ 040 public RemoteEventEncoder(final Encoder<T> encoder) { 041 this.encoder = encoder; 042 } 043 044 /** 045 * Encodes the remote event object to bytes. 046 * 047 * @param obj the remote event 048 * @return bytes 049 * @throws RemoteRuntimeException 050 */ 051 @Override 052 public byte[] encode(final RemoteEvent<T> obj) { 053 if (obj.getEvent() == null) { 054 throw new RemoteRuntimeException("Event is null"); 055 } 056 057 final WakeMessagePBuf.Builder builder = WakeMessagePBuf.newBuilder(); 058 builder.setSeq(obj.getSeq()); 059 builder.setData(ByteString.copyFrom(encoder.encode(obj.getEvent()))); 060 061 return builder.build().toByteArray(); 062 } 063 064}