93 lines
3.2 KiB
Java
93 lines
3.2 KiB
Java
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/*
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* Copyright (C) 2008 Trustin Heuiseung Lee
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, 5th Floor, Boston, MA 02110-1301 USA
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*/
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package net.gleamynode.netty.handler.codec.serialization;
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import static net.gleamynode.netty.buffer.ChannelBuffers.*;
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import static net.gleamynode.netty.channel.Channels.*;
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import java.io.ObjectOutputStream;
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import java.io.OutputStream;
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import net.gleamynode.netty.buffer.ChannelBuffer;
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import net.gleamynode.netty.buffer.ChannelBufferOutputStream;
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import net.gleamynode.netty.channel.ChannelDownstreamHandler;
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import net.gleamynode.netty.channel.ChannelEvent;
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import net.gleamynode.netty.channel.ChannelHandlerContext;
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import net.gleamynode.netty.channel.ChannelPipelineCoverage;
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import net.gleamynode.netty.channel.MessageEvent;
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/**
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* @author The Netty Project (netty@googlegroups.com)
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* @author Trustin Lee (trustin@gmail.com)
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*
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* @version $Rev:231 $, $Date:2008-06-12 16:44:50 +0900 (목, 12 6월 2008) $
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*
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*/
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@ChannelPipelineCoverage("all")
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public class CompatibleObjectEncoder implements ChannelDownstreamHandler {
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private final ChannelBuffer buffer = dynamicBuffer();
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private final int resetInterval;
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private volatile ObjectOutputStream oout;
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private int writtenObjects;
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public CompatibleObjectEncoder() {
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this(16); // Reset at every sixteen writes
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}
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public CompatibleObjectEncoder(int resetInterval) {
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if (resetInterval < 0) {
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throw new IllegalArgumentException(
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"resetInterval: " + resetInterval);
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}
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this.resetInterval = resetInterval;
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}
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public void handleDownstream(
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ChannelHandlerContext context, ChannelEvent evt) throws Exception {
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if (!(evt instanceof MessageEvent)) {
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context.sendDownstream(evt);
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return;
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}
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MessageEvent e = (MessageEvent) evt;
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buffer.clear();
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if (oout == null) {
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oout = newObjectOutputStream(new ChannelBufferOutputStream(buffer));
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}
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if (resetInterval != 0) {
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// Resetting will prevent OOM on the receiving side.
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writtenObjects ++;
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if (writtenObjects % resetInterval == 0) {
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oout.reset();
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}
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}
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oout.writeObject(e.getMessage());
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oout.flush();
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ChannelBuffer encoded = buffer.readBytes(buffer.readableBytes());
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write(context, e.getChannel(), e.getFuture(), encoded, e.getRemoteAddress());
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}
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protected ObjectOutputStream newObjectOutputStream(OutputStream out) throws Exception {
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return new ObjectOutputStream(out);
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}
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}
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