DefaultJavaSerializer.java

/**
 *  Copyright (c) 2015 The original author or authors
 *
 *  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 org.reveno.atp.core.serialization;

import org.reveno.atp.api.domain.RepositoryData;
import org.reveno.atp.api.exceptions.BufferOutOfBoundsException;
import org.reveno.atp.api.exceptions.SerializerException;
import org.reveno.atp.api.exceptions.SerializerException.Action;
import org.reveno.atp.core.api.TransactionCommitInfo;
import org.reveno.atp.core.api.TransactionCommitInfo.Builder;
import org.reveno.atp.core.api.channel.Buffer;
import org.reveno.atp.core.api.channel.RevenoBufferInputStream;
import org.reveno.atp.core.api.channel.RevenoBufferOutputStream;
import org.reveno.atp.core.api.serialization.RepositoryDataSerializer;
import org.reveno.atp.core.api.serialization.TransactionInfoSerializer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.util.List;

public class DefaultJavaSerializer implements RepositoryDataSerializer,
		TransactionInfoSerializer {

	@Override
	public int getSerializerType() {
		return DEFAULT_TYPE;
	}
	
	@Override
	public boolean isRegistered(Class<?> type) {
		return true;
	}

	@Override
	public void registerTransactionType(Class<?> txDataType) {
	}

	@Override
	public void serialize(TransactionCommitInfo info, Buffer buffer) {
		buffer.writeLong(info.transactionId());
		buffer.writeLong(info.time());

		try (RevenoBufferOutputStream ba = new RevenoBufferOutputStream(buffer);
				ObjectOutputStream os = new ObjectOutputStream(ba)) {
			os.writeObject(info.transactionCommits());
		} catch (IOException e) {
			throw new SerializerException(Action.SERIALIZATION, getClass(), e);
		}
	}

	@SuppressWarnings("unchecked")
	@Override
	public TransactionCommitInfo deserialize(Builder builder, Buffer buffer) {
		long transactionId = buffer.readLong();
		long time = buffer.readLong();
		if (transactionId == 0 && time == 0) {
			throw new BufferOutOfBoundsException();
		}

		try (RevenoBufferInputStream is = new RevenoBufferInputStream(buffer);
			 ObjectInputStreamEx os = new ObjectInputStreamEx(is, classLoader)) {
			return builder.create().transactionId(transactionId).time(time).transactionCommits((List<Object>)os.readObject());
		} catch (IOException | ClassNotFoundException e) {
			throw new SerializerException(Action.DESERIALIZATION, getClass(), e);
		}
	}

	@Override
	public void serialize(RepositoryData repository, Buffer buffer) {
		try (RevenoBufferOutputStream ba = new RevenoBufferOutputStream(buffer);
				ObjectOutputStream os = new ObjectOutputStream(ba)) {
			os.writeObject(repository);
		} catch (IOException e) {
			throw new SerializerException(Action.SERIALIZATION, getClass(), e);
		}
	}

	@Override
	public RepositoryData deserialize(Buffer buffer) {
		try (RevenoBufferInputStream is = new RevenoBufferInputStream(buffer);
				ObjectInputStreamEx os = new ObjectInputStreamEx(is,
						classLoader)) {
			return (RepositoryData) os.readObject();
		} catch (IOException | ClassNotFoundException e) {
			throw new SerializerException(Action.DESERIALIZATION, getClass(), e);
		}
	}

	@Override
	public void serializeCommands(List<Object> commands, Buffer buffer) {
		try (RevenoBufferOutputStream ba = new RevenoBufferOutputStream(buffer);
			 ObjectOutputStream os = new ObjectOutputStream(ba)) {
			os.writeObject(commands);
		} catch (IOException e) {
			throw new SerializerException(Action.SERIALIZATION, getClass(), e);
		}
	}

	@SuppressWarnings("unchecked")
	@Override
	public List<Object> deserializeCommands(Buffer buffer) {
		try (RevenoBufferInputStream is = new RevenoBufferInputStream(buffer);
			 ObjectInputStreamEx os = new ObjectInputStreamEx(is, classLoader)) {
			return (List<Object>) os.readObject();
		} catch (IOException | ClassNotFoundException e) {
			throw new SerializerException(Action.DESERIALIZATION, getClass(), e);
		}
	}
	
	@Override
	public void serializeObject(Buffer buffer, Object tc) {
		try (ByteArrayOutputStream ba = new ByteArrayOutputStream(); 
				ObjectOutputStream os = new ObjectOutputStream(ba)) {
			os.writeObject(tc);
			buffer.writeInt(ba.size());
			buffer.writeBytes(ba.toByteArray());
		} catch (IOException e) {
			throw new SerializerException(Action.SERIALIZATION, getClass(), e);
		}
	}

	@Override
	public Object deserializeObject(Buffer buffer) {
		try (ByteArrayInputStream is = new ByteArrayInputStream(
				buffer.readBytes(buffer.readInt()));
				ObjectInputStreamEx os = new ObjectInputStreamEx(is,
						classLoader)) {
			return os.readObject();
		} catch (IOException | ClassNotFoundException e) {
			throw new SerializerException(Action.DESERIALIZATION, getClass(), e);
		}
	}

	public DefaultJavaSerializer() {
		this(Thread.currentThread().getContextClassLoader());
	}

	public DefaultJavaSerializer(ClassLoader classLoader) {
		this.classLoader = classLoader;
	}

	private ClassLoader classLoader;
	protected static final int DEFAULT_TYPE = 0x111;

	/*
	 * We need OSGi compliancy here
	 */
	public static class ObjectInputStreamEx extends ObjectInputStream {
		private ClassLoader classLoader;

		public ObjectInputStreamEx(InputStream input, ClassLoader classLoader)
				throws IOException {
			super(input);
			this.classLoader = classLoader;
		}

		@Override
		protected Class<?> resolveClass(ObjectStreamClass desc)
				throws IOException, ClassNotFoundException {
			try {
				return classLoader.loadClass(desc.getName());
			} catch (Throwable t) {
				return super.resolveClass(desc);
			}
		}
	}

}