/*
* Copyright 2013 Netflix, 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.netflix.suro.message;
import com.google.common.io.ByteArrayDataOutput;
import com.google.common.io.ByteStreams;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.IOException;
/**
* Message itself should be (de)serialized. This serde is mainly used to persist
* messages to somewhere including file based queue
*
* @author jbae
*/
public class MessageSerDe implements SerDe<Message> {
private final static Logger log = LoggerFactory.getLogger(MessageSerDe.class);
private ThreadLocal<ByteArrayOutputStream> outputStream =
new ThreadLocal<ByteArrayOutputStream>() {
@Override
protected ByteArrayOutputStream initialValue() {
return new ByteArrayOutputStream();
}
@Override
public ByteArrayOutputStream get() {
ByteArrayOutputStream b = super.get();
b.reset();
return b;
}
};
@Override
public Message deserialize(byte[] payload) {
try {
DataInput dataInput = ByteStreams.newDataInput(payload);
Class<? extends Message> clazz = Message.classMap.get(dataInput.readByte());
Message msg = clazz.newInstance();
msg.readFields(dataInput);
return msg;
} catch (Exception e) {
log.error("Exception on deserialize: " + e.getMessage(), e);
return new Message();
}
}
@Override
public byte[] serialize(Message payload) {
try {
ByteArrayDataOutput out = new ByteArrayDataOutputStream(outputStream.get());
out.writeByte(Message.classMap.inverse().get(payload.getClass()));
payload.write(out);
return out.toByteArray();
} catch (IOException e) {
log.error("Exception on serialize: " + e.getMessage(), e);
return new byte[]{};
}
}
@Override
public String toString(byte[] payload) {
return deserialize(payload).toString();
}
}