/*
Copyright 2013 Twitter, Inc.
Licensed 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 com.twitter.chill.hadoop;
import org.apache.hadoop.io.serializer.Serializer;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import com.twitter.chill.KryoPool;
import com.twitter.chill.SerDeState;
public class KryoSerializer implements Serializer<Object> {
private final KryoPool kryoPool;
private DataOutputStream outputStream;
public KryoSerializer(KryoPool kp) {
kryoPool = kp;
}
public void open(OutputStream out) throws IOException {
if(out instanceof DataOutputStream)
outputStream = (DataOutputStream)out;
else
outputStream = new DataOutputStream(out);
}
public void serialize(Object o) throws IOException {
// The outputs are borrowed in a clean state, ready to use
SerDeState st = kryoPool.borrow();
try {
st.writeObject(o);
// Copy from buffer to output stream.
outputStream.writeInt(st.numOfWrittenBytes());
st.writeOutputTo(outputStream);
}
finally {
kryoPool.release(st);
}
outputStream.flush();
}
public void close() throws IOException {
try {
if(outputStream != null) {
outputStream.close();
}
} finally {
outputStream = null;
}
}
}