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

io.netty.channel.ChannelPipeline.context()
Returns the context object of the specified {@link ChannelHandler} inthis pipeline. @return the context object of the specified handler.{@code null} if there's no such handler in this pipeline.

                        p.remove(HttpObjectAggregator.class);
                    }
                    ChannelHandlerContext ctx = p.context(HttpRequestDecoder.class);
                    if (ctx == null) {
                        // this means the user use a HttpServerCodec
                        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());

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                if (future.isSuccess()) {
                    ChannelPipeline p = future.channel().pipeline();
                    if (p.get(HttpObjectAggregator.class) != null) {
                        p.remove(HttpObjectAggregator.class);
                    }
                    ChannelHandlerContext ctx = p.context(HttpRequestDecoder.class);
                    if (ctx == null) {
                        // this means the user use a HttpServerCodec
                        ctx = p.context(HttpServerCodec.class);
                        if (ctx == null) {
                            throw new IllegalStateException("No HttpDecoder and no HttpServerCodec in the pipeline");

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        }


        @Override
        public Observable<Void> handle(final ObservableConnection<I, O> connection) {
            final ChannelPipeline p = connection.getChannel().pipeline();
            ChannelHandlerContext hctx = p.context(WebSocketServerHandler.class);
            if (hctx != null) {
                WebSocketServerHandler handler = p.get(WebSocketServerHandler.class);
                final PublishSubject<Void> subject = PublishSubject.create();
                handler.addHandshakeFinishedListener(new ChannelFutureListener() {
                    @Override

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                }


                @Override
                public void onNext(final ObservableConnection<T, T> connection) {
                    final ChannelPipeline p = connection.getChannel().pipeline();
                    ChannelHandlerContext hctx = p.context(WebSocketClientHandler.class);
                    if (hctx != null) {
                        WebSocketClientHandler handler = p.get(WebSocketClientHandler.class);
                        handler.addHandshakeFinishedListener(new ChannelFutureListener() {
                            @Override
                            public void operationComplete(ChannelFuture future) throws Exception {

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        }
    }


    private void updatePipeline(ChannelHandlerContext ctx) {
        ChannelPipeline p = ctx.pipeline();
        ChannelHandlerContext nettyEncoderCtx = p.context(WebSocketFrameEncoder.class);
        p.addAfter(nettyEncoderCtx.name(), "websocket-write-metrics", new ServerWriteMetricsHandler(eventsSubject));
        ChannelHandlerContext nettyDecoderCtx = p.context(WebSocketFrameDecoder.class);
        p.addAfter(nettyDecoderCtx.name(), "websocket-read-metrics", new ServerReadMetricsHandler(eventsSubject));
        if (messageAggregator) {
            p.addAfter("websocket-read-metrics", "websocket-frame-aggregator", new WebSocketFrameAggregator(maxFramePayloadLength));

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    private void updatePipeline(ChannelHandlerContext ctx) {
        ChannelPipeline p = ctx.pipeline();
        ChannelHandlerContext nettyEncoderCtx = p.context(WebSocketFrameEncoder.class);
        p.addAfter(nettyEncoderCtx.name(), "websocket-write-metrics", new ServerWriteMetricsHandler(eventsSubject));
        ChannelHandlerContext nettyDecoderCtx = p.context(WebSocketFrameDecoder.class);
        p.addAfter(nettyDecoderCtx.name(), "websocket-read-metrics", new ServerReadMetricsHandler(eventsSubject));
        if (messageAggregator) {
            p.addAfter("websocket-read-metrics", "websocket-frame-aggregator", new WebSocketFrameAggregator(maxFramePayloadLength));
        }
        p.remove(this);

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            return;
        }
        eventsSubject.onEvent(WebSocketClientMetricsEvent.HANDSHAKE_SUCCESS, Clock.onEndMillis(handshakeStartTime));


        ChannelPipeline p = ctx.pipeline();
        ChannelHandlerContext nettyDecoderCtx = p.context(WebSocketFrameDecoder.class);
        p.addAfter(nettyDecoderCtx.name(), "websocket-read-metrics", new ClientReadMetricsHandler(eventsSubject));
        ChannelHandlerContext nettyEncoderCtx = p.context(WebSocketFrameEncoder.class);
        p.addAfter(nettyEncoderCtx.name(), "websocket-write-metrics", new ClientWriteMetricsHandler(eventsSubject));
        if (messageAggregation) {
            p.addAfter("websocket-read-metrics", "websocket-frame-aggregator", new WebSocketFrameAggregator(maxFramePayloadLength));

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        eventsSubject.onEvent(WebSocketClientMetricsEvent.HANDSHAKE_SUCCESS, Clock.onEndMillis(handshakeStartTime));


        ChannelPipeline p = ctx.pipeline();
        ChannelHandlerContext nettyDecoderCtx = p.context(WebSocketFrameDecoder.class);
        p.addAfter(nettyDecoderCtx.name(), "websocket-read-metrics", new ClientReadMetricsHandler(eventsSubject));
        ChannelHandlerContext nettyEncoderCtx = p.context(WebSocketFrameEncoder.class);
        p.addAfter(nettyEncoderCtx.name(), "websocket-write-metrics", new ClientWriteMetricsHandler(eventsSubject));
        if (messageAggregation) {
            p.addAfter("websocket-read-metrics", "websocket-frame-aggregator", new WebSocketFrameAggregator(maxFramePayloadLength));
        }
        p.remove(HttpObjectAggregator.class);

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        channel.write(request).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) {
                if (future.isSuccess()) {
                    ChannelPipeline p = future.channel().pipeline();
                    ChannelHandlerContext ctx = p.context(HttpRequestEncoder.class);
                    if (ctx == null) {
                        ctx = p.context(HttpClientCodec.class);
                    }
                    if (ctx == null) {
                        promise.setFailure(new IllegalStateException("ChannelPipeline does not contain " +

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            public void operationComplete(ChannelFuture future) {
                if (future.isSuccess()) {
                    ChannelPipeline p = future.channel().pipeline();
                    ChannelHandlerContext ctx = p.context(HttpRequestEncoder.class);
                    if (ctx == null) {
                        ctx = p.context(HttpClientCodec.class);
                    }
                    if (ctx == null) {
                        promise.setFailure(new IllegalStateException("ChannelPipeline does not contain " +
                                "a HttpRequestEncoder or HttpClientCodec"));
                        return;

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