1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.giraph.writable.kryo; 19 20 import java.io.DataInput; 21 import java.io.DataOutput; 22 import java.io.IOException; 23 24 import com.esotericsoftware.kryo.io.Input; 25 import com.esotericsoftware.kryo.io.Output; 26 import org.apache.giraph.writable.kryo.markers.KryoIgnoreWritable; 27 28 /** 29 * Class which you can extend to get all serialization/deserialization 30 * done automagically. 31 * 32 * Usage of this class is similar to KryoWritable but 33 * unlike KryoWritable, this class does not 34 * support recursive/nested objects to provide better 35 * performance. 36 * 37 * If the underlying stream is a kryo output stream than the read/write 38 * happens with a kryo object that doesn't track references, providing 39 * significantly better performance. 40 * 41 */ 42 public abstract class KryoSimpleWritable implements KryoIgnoreWritable { 43 @Override 44 public final void write(DataOutput out) throws IOException { 45 if (out instanceof Output) { 46 Output outp = (Output) out; 47 HadoopKryo.writeWithKryoOutOfObject( 48 HadoopKryo.getNontrackingKryo(), outp, this); 49 } else { 50 HadoopKryo.writeOutOfObject(out, this); 51 } 52 } 53 54 @Override 55 public final void readFields(DataInput in) throws IOException { 56 if (in instanceof Input) { 57 Input inp = (Input) in; 58 HadoopKryo.readWithKryoIntoObject( 59 HadoopKryo.getNontrackingKryo(), inp, this); 60 } else { 61 HadoopKryo.readIntoObject(in, this); 62 } 63 } 64 }