Examples of io.netty.channel.ChannelPipeline.replace()

io.netty.channel.ChannelPipeline.replace()
Replaces the specified {@link ChannelHandler} with a new handler inthis pipeline. All the remaining content in the {@link} Buf) (if any) of the {@link ChannelHandler}will be discarded. @param oldHandler the {@link ChannelHandler} to be replaced @param newName the name under which the replacement should be added @param newHandler the {@link ChannelHandler} which is used as replacement @return itself @throws NoSuchElementException if the specified old handler does not exist in this pipeline @throws IllegalArgumentException if a handler with the specified new name already exists in this pipeline, except for the handler to be replaced @throws NullPointerException if the specified old handler, new name, or new handler is {@code null}

                    SaslServer server = this.server;
                    this.server = null;
                    // Replace this handler now with the QopHandler
                    // This is mainly done as the QopHandler itself will not block at all and so we can
                    // get rid of the usage of the EventExecutorGroup after the negation took place.
                    pipeline.replace(this, ctx.name(), new QopHandler(server));
                } else {
                    // there is no need for any QOP handling so we are done now and can just remove ourself from the
                    // pipeline
                    pipeline.remove(this);
                }

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                        ctx = p.context(HttpServerCodec.class);
                        if (ctx == null) {
                            throw new IllegalStateException("No HttpDecoder and no HttpServerCodec in the pipeline");
                        }
                        p.addBefore(ctx.name(), "wsencoder", newWebsocketDecoder());
                        p.replace(ctx.name(), "wsdecoder", newWebSocketEncoder());
                    } else {
                        p.remove(HttpRequestDecoder.class);
                        p.remove(HttpResponseEncoder.class);
                    }
                } else {

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                    if (future.isSuccess()) {
                        final ChannelPipeline pipeline = future.channel().pipeline();
                        pipeline.remove(SockJsHandler.class);
                        pipeline.remove(CorsInboundHandler.class);
                        pipeline.remove(CorsOutboundHandler.class);
                        pipeline.replace(WebSocketTransport.class, "websocket-ha-proxy",
                                new WebSocketHAProxyTransport(haHandshaker));
                        pipeline.addLast(new WebSocketSendHandler());
                    }
                }
            });

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                        p.addBefore(ctx.name(), "wsencoder", newWebsocketDecoder());
                        p.replaceAndForward(ctx.name(), "wsdecoder", newWebSocketEncoder());
                    } else {
                        p.replaceAndForward(ctx.name(), "wsdecoder", newWebsocketDecoder());


                        p.replace(HttpResponseEncoder.class, "wsencoder", newWebSocketEncoder());
                    }
                    promise.setSuccess();
                } else {
                    promise.setFailure(future.cause());
                }

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    ChannelHandler inflater = pipeline.get(HttpContentDecompressor.class);
    if (inflater != null) {
      pipeline.remove(inflater);
    }
    pipeline.remove("codec");
    pipeline.replace("handler", "handler", new VertxNetHandler(client.getVertx(), connectionMap) {
      @Override
      public void exceptionCaught(ChannelHandlerContext chctx, Throwable t) throws Exception {
        // remove from the real mapping
        client.removeChannel(channel);
        super.exceptionCaught(chctx, t);

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        ChannelPipeline p = channel.getPipeline();
        if (p.get(HttpChunkAggregator.class) != null) {
            p.remove(HttpChunkAggregator.class);
        }


        p.replace(HttpRequestDecoder.class, "wsdecoder", new WebSocket08FrameDecoder(true, allowExtensions));
        p.replace(HttpResponseEncoder.class, "wsencoder", new WebSocket08FrameEncoder(false));


        return future;
    }

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        if (p.get(HttpChunkAggregator.class) != null) {
            p.remove(HttpChunkAggregator.class);
        }


        p.replace(HttpRequestDecoder.class, "wsdecoder", new WebSocket08FrameDecoder(true, allowExtensions));
        p.replace(HttpResponseEncoder.class, "wsencoder", new WebSocket08FrameEncoder(false));


        return future;
    }


    /**

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        // Upgrade the connection and send the handshake response.
        ChannelPipeline p = channel.getPipeline();
        if (p.get(HttpChunkAggregator.class) != null) {
            p.remove(HttpChunkAggregator.class);
        }
        p.replace(HttpRequestDecoder.class, "wsdecoder", new WebSocket00FrameDecoder());


        ChannelFuture future = channel.write(res);


        p.replace(HttpResponseEncoder.class, "wsencoder", new WebSocket00FrameEncoder());

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        }
        p.replace(HttpRequestDecoder.class, "wsdecoder", new WebSocket00FrameDecoder());


        ChannelFuture future = channel.write(res);


        p.replace(HttpResponseEncoder.class, "wsencoder", new WebSocket00FrameEncoder());


        return future;
    }


    /**

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        ChannelPipeline p = channel.getPipeline();
        if (p.get(HttpChunkAggregator.class) != null) {
            p.remove(HttpChunkAggregator.class);
        }


        p.replace(HttpRequestDecoder.class, "wsdecoder", new WebSocket13FrameDecoder(true, allowExtensions));
        p.replace(HttpResponseEncoder.class, "wsencoder", new WebSocket13FrameEncoder(false));


        return future;
    }

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