/*
* 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.input.thrift;
import com.netflix.suro.message.SerDe;
import com.netflix.suro.thrift.TMessageSet;
import com.netflix.suro.util.Closeables;
import org.apache.hadoop.io.DataInputBuffer;
import org.apache.hadoop.io.DataOutputBuffer;
import java.nio.ByteBuffer;
/**
* {@link SerDe} implementation that serializes and de-serializes {@link TMessageSet}. This is serde is used to persist
* {@link TMessageSet} objects to a disk-based queue. Messages in {@link TMessageSet} objects that are not consumed would be lost when the server fails,
* if only in-memory queue is used to store {@link TMessageSet} objects.
*
* @author jbae
*/
public class MessageSetSerDe implements SerDe<TMessageSet> {
@Override
public TMessageSet deserialize(byte[] payload) {
DataInputBuffer inBuffer = new DataInputBuffer();
inBuffer.reset(payload, payload.length);
try {
String app = inBuffer.readUTF();
int numMessages = inBuffer.readInt();
byte compression = inBuffer.readByte();
long crc = inBuffer.readLong();
byte[] messages = new byte[inBuffer.readInt()];
inBuffer.read(messages);
return new TMessageSet(
app,
numMessages,
compression,
crc,
ByteBuffer.wrap(messages)
);
} catch (Exception e) {
throw new RuntimeException("Failed to de-serialize payload into TMessageSet: "+e.getMessage(), e);
} finally {
Closeables.closeQuietly(inBuffer);
}
}
@Override
public byte[] serialize(TMessageSet payload) {
DataOutputBuffer outBuffer = new DataOutputBuffer();
try {
outBuffer.reset();
outBuffer.writeUTF(payload.getApp());
outBuffer.writeInt(payload.getNumMessages());
outBuffer.writeByte(payload.getCompression());
outBuffer.writeLong(payload.getCrc());
outBuffer.writeInt(payload.getMessages().length);
outBuffer.write(payload.getMessages());
return ByteBuffer.wrap(outBuffer.getData(), 0, outBuffer.getLength()).array();
} catch (Exception e) {
throw new RuntimeException("Failed to serialize TMessageSet: "+e.getMessage(), e);
} finally {
Closeables.closeQuietly(outBuffer);
}
}
@Override
public String toString(byte[] payload) {
return deserialize(payload).toString();
}
}