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POMigrating sendUpstream in Netty 4
 

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  1. POMigrating sendUpstream in Netty 4
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    <p>I'm migrating from netty 3 to netty 4. I have a pipeline handler that acts as a classic filter, intercepting/handling noncompliant messages on the way, and shoveling compliant ones upstream. </p> <p>Based on the documentation (<a href="http://netty.io/wiki/new-and-noteworthy.html" rel="nofollow">http://netty.io/wiki/new-and-noteworthy.html</a>), I expected to use <code>ctx.fireInboundBufferUpdated()</code> in lieu of <code>ctx.sendUpStream()</code> to relay inbound. However, I've found this doesn't work, but <code>ChannelHandlerUtil.addToNextInboundBuffer()</code> does. I'd love some guidance as to: </p> <ol> <li>My confusion over the current docs assertion that <code>ctx.sendUpstream -&gt; ctx.fireInboundBufferUpdated</code> and, </li> <li>What is the best practice in this case, if different than what I've done below.</li> </ol> <p>The code:</p> <pre><code>//The pipeline public class ServerInitializer extends ChannelInitializer&lt;SocketChannel&gt; { @Override public void initChannel(SocketChannel ch) throws Exception { ChannelPipeline p = ch.pipeline(); p.addLast("decoder", new HttpRequestDecoder()); p.addLast("encoder", new HttpResponseEncoder()); p.addLast("inbound", InboundHttpRequestFilter.INSTANCE); p.addLast("handler", handlerClass.newInstance()); } } //The filter public class InboundHttpRequestFilter extends ChannelInboundMessageHandlerAdapter&lt;Object&gt; { @Override public void messageReceived(ChannelHandlerContext ctx, Object msg) throws Exception { ... discard/handle as necessary …; //ctx.fireInboundBufferUpdated(); - doesn't propagate upstream ChannelHandlerUtil.addToNextInboundBuffer(ctx, msg); // sends upstream } } </code></pre>
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