util.MarshallingEncoder.java Source code

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Here is the source code for util.MarshallingEncoder.java

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/*
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package util;

import io.netty.buffer.ByteBuf;
import java.io.IOException;
import org.jboss.marshalling.ByteOutput;
import org.jboss.marshalling.Marshaller;

/**
 *
 * @author allen
 */
public class MarshallingEncoder {
    private static final byte[] LENGTH_PLACEHOLDER = new byte[4];
    private Marshaller marshaller;

    public MarshallingEncoder() throws IOException {
        marshaller = MarshallingCodecFactory.buildMarshalling();
    } //MarshallingEncoder()

    protected void encode(Object msg, ByteBuf out) throws Exception {
        try {
            int lengthPos = out.writerIndex();
            out.writeBytes(LENGTH_PLACEHOLDER);

            ByteOutput output = new ChannelBufferByteOutput(out);
            marshaller.start(output);
            marshaller.writeObject(msg);
            marshaller.finish();

            out.setInt(lengthPos, out.writerIndex() - lengthPos - 4);
        } finally {
            marshaller.close();
        } //try-finally
    } //encode()            

} //MarshallingEncoder