Add StreamToMessageDecoder.replace() (#332)
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ca12e41406
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@ -4,14 +4,19 @@ import static io.netty.handler.codec.MessageToMessageEncoder.*;
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import io.netty.buffer.ChannelBuffer;
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import io.netty.channel.ChannelBufferHolder;
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import io.netty.channel.ChannelBufferHolders;
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import io.netty.channel.ChannelInboundHandler;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import io.netty.channel.ChannelInboundHandlerContext;
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import io.netty.channel.ChannelPipeline;
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public abstract class StreamToMessageDecoder<O> extends ChannelInboundHandlerAdapter<Byte> {
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private ChannelInboundHandlerContext<Byte> ctx;
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@Override
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public ChannelBufferHolder<Byte> newInboundBuffer(
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ChannelInboundHandlerContext<Byte> ctx) throws Exception {
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this.ctx = ctx;
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return ChannelBufferHolders.byteBuffer();
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}
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@ -84,6 +89,31 @@ public abstract class StreamToMessageDecoder<O> extends ChannelInboundHandlerAda
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}
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}
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/**
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* Replace this decoder in the {@link ChannelPipeline} with the given handler.
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* All remaining bytes in the inbound buffer will be forwarded to the new handler's
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* inbound buffer.
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*/
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public void replace(String newHandlerName, ChannelInboundHandler<Byte> newHandler) {
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if (!ctx.channel().eventLoop().inEventLoop()) {
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throw new IllegalStateException("not in event loop");
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}
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// We do not use ChannelPipeline.replace() here so that the current context points
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// the new handler.
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ctx.pipeline().addAfter(ctx.name(), newHandlerName, newHandler);
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ChannelBuffer in = ctx.in().byteBuffer();
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try {
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if (in.readable()) {
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ctx.nextIn().byteBuffer().writeBytes(ctx.in().byteBuffer());
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ctx.fireInboundBufferUpdated();
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}
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} finally {
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ctx.pipeline().remove(this);
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}
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}
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public abstract O decode(ChannelInboundHandlerContext<Byte> ctx, ChannelBuffer in) throws Exception;
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public O decodeLast(ChannelInboundHandlerContext<Byte> ctx, ChannelBuffer in) throws Exception {
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