/*
* JBoss, Home of Professional Open Source.
* Copyright 2013, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.wildfly.clustering.server.dispatcher;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.nio.ByteBuffer;
import org.jboss.marshalling.Marshaller;
import org.jboss.marshalling.Marshalling;
import org.jboss.marshalling.Unmarshaller;
import org.jgroups.blocks.RpcDispatcher;
import org.jgroups.util.Buffer;
import org.wildfly.clustering.jgroups.spi.ChannelFactory;
import org.wildfly.clustering.marshalling.jboss.MarshallingContext;
import org.wildfly.clustering.marshalling.spi.IndexExternalizer;
/**
* Marshalling strategy for the command response.
* @author Paul Ferraro
*
* @param <C> command execution context
*/
public class CommandResponseMarshaller implements RpcDispatcher.Marshaller {
private final MarshallingContext context;
private final ChannelFactory factory;
CommandResponseMarshaller(ChannelCommandDispatcherFactoryConfiguration config) {
this.context = config.getMarshallingContext();
this.factory = config.getChannelFactory();
}
@Override
public Buffer objectToBuffer(Object object) throws Exception {
int version = this.context.getCurrentVersion();
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
try (DataOutputStream output = new DataOutputStream(bytes)) {
IndexExternalizer.VARIABLE.writeData(output, version);
try (Marshaller marshaller = this.context.createMarshaller(version)) {
marshaller.start(Marshalling.createByteOutput(output));
marshaller.writeObject(object);
marshaller.flush();
}
}
return new Buffer(bytes.toByteArray());
}
@Override
public Object objectFromBuffer(byte[] buffer, int offset, int length) throws Exception {
if (this.factory.isUnknownForkResponse(ByteBuffer.wrap(buffer, offset, length))) return NoSuchService.INSTANCE;
try (DataInputStream input = new DataInputStream(new ByteArrayInputStream(buffer, offset, length))) {
int version = IndexExternalizer.VARIABLE.readData(input);
try (Unmarshaller unmarshaller = this.context.createUnmarshaller(version)) {
unmarshaller.start(Marshalling.createByteInput(input));
return unmarshaller.readObject();
}
}
}
}