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}

        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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                    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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       pipeline.addLast("handler3", new ThirdHandler());


       pipeline.remove("handler3");
       pipeline.remove(firstHandler);


       pipeline.replace("handler2", "handler4", new ForthHandler());


   }


   private static final class FirstHandler extends ChannelHandlerAdapter {

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            ctx = p.context(HttpClientCodec.class);
            if (ctx == null) {
                throw new IllegalStateException("ChannelPipeline does not contain " +
                        "a HttpRequestEncoder or HttpClientCodec");
            }
            p.replace(ctx.name(), "ws-decoder", newWebsocketDecoder());
        } else {
            if (p.get(HttpRequestEncoder.class) != null) {
                p.remove(HttpRequestEncoder.class);
            }
            p.replace(ctx.name(),

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            p.replace(ctx.name(), "ws-decoder", newWebsocketDecoder());
        } else {
            if (p.get(HttpRequestEncoder.class) != null) {
                p.remove(HttpRequestEncoder.class);
            }
            p.replace(ctx.name(),
                    "ws-decoder", newWebsocketDecoder());
        }
    }


    /**

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