Examples of io.netty.channel.MessageEvent

io.netty.channel.MessageEvent
A {@link ChannelEvent} which represents the transmission or reception of amessage. It can mean the notification of a received message or the request for writing a message, depending on whether it is an upstream event or a downstream event respectively. Please refer to the {@link ChannelEvent}documentation to find out what an upstream event and a downstream event are and what fundamental differences they have.

            }


            List<MessageEvent> pendingWrites = new ArrayList<MessageEvent>();
            synchronized (this) {
                for (;;) {
                    MessageEvent e = queue.poll();
                    if (e == null) {
                        break;
                    }
                    if (!(e.getMessage() instanceof ChannelBuffer)) {
                        if ((pendingWrites = consolidatedWrite(pendingWrites)) == null) {
                            pendingWrites = new ArrayList<MessageEvent>();
                        }
                        ctx.sendDownstream(e);
                    } else {
                        pendingWrites.add(e);
                    }
                }
                consolidatedWrite(pendingWrites);
            }
        } else {
            synchronized (this) {
                for (;;) {
                    MessageEvent e = queue.poll();
                    if (e == null) {
                        break;
                    }
                    ctx.sendDownstream(e);
                }

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            }


        } else if (e instanceof MessageEvent) {


            final MessageEvent event = (MessageEvent) e;
            if (event.getMessage() instanceof ChannelBuffer) {
                executor.execute(
                        new WriteRunnable((DefaultChannelFuture) future, this, (ChannelBuffer) event.getMessage())
                );
            } else {
                throw new IllegalArgumentException(
                        "Only ChannelBuffer objects are supported to be written onto the RXTXChannelSink! "
                                + "Please check if the encoder pipeline is configured correctly."

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        if (getLogger().isEnabled(level)) {
            String msg = e.toString();


            // Append hex dump if necessary.
            if (hexDump && e instanceof MessageEvent) {
                MessageEvent me = (MessageEvent) e;
                if (me.getMessage() instanceof ChannelBuffer) {
                    ChannelBuffer buf = (ChannelBuffer) me.getMessage();
                    msg = msg + " - (HEXDUMP: " + hexDump(buf) + ')';
                }
            }


            // Log the message (and exception if available.)

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    private void discard(ChannelHandlerContext ctx) {
        ClosedChannelException cause = null;
        boolean fireExceptionCaught = false;
           
        for (;;) {
            MessageEvent currentEvent = this.currentEvent;
                
            if (this.currentEvent == null) { 
                currentEvent = queue.poll(); 
            } else {
                this.currentEvent = null; 
            }


            if (currentEvent == null) { 
                break; 
            }
            
              
            Object m = currentEvent.getMessage();
            if (m instanceof ChunkedInput) {
                closeInput((ChunkedInput) m);
            }


            // Trigger a ClosedChannelException
            if (cause == null) {
                cause = new ClosedChannelException();
            }
            currentEvent.getFuture().setFailure(cause);
            fireExceptionCaught = true;


            currentEvent = null;
        }

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            if (currentEvent.getFuture().isDone()) {
                // Skip the current request because the previous partial write
                // attempt for the current request has been failed.
                currentEvent = null;
            } else {
                final MessageEvent currentEvent = this.currentEvent;
                Object m = currentEvent.getMessage();
                if (m instanceof ChunkedInput) {
                    ChunkedInput chunks = (ChunkedInput) m;
                    Object chunk;
                    boolean endOfInput;
                    boolean suspend;
                    try {
                        chunk = chunks.nextChunk();
                        endOfInput = chunks.isEndOfInput();
                        if (chunk == null) {
                            chunk = ChannelBuffers.EMPTY_BUFFER;
                            // No need to suspend when reached at the end.
                            suspend = !endOfInput;
                        } else {
                            suspend = false;
                        }
                    } catch (Throwable t) {
                        this.currentEvent = null;


                        currentEvent.getFuture().setFailure(t);
                        fireExceptionCaught(ctx, t);


                        closeInput(chunks);
                        break;
                    }


                    if (suspend) {
                        // ChunkedInput.nextChunk() returned null and it has
                        // not reached at the end of input.  Let's wait until
                        // more chunks arrive.  Nothing to write or notify.
                        break;
                    } else {
                        ChannelFuture writeFuture;
                        if (endOfInput) {
                            this.currentEvent = null;
                            closeInput(chunks);
                            writeFuture = currentEvent.getFuture();
                        } else {
                            writeFuture = future(channel);
                            writeFuture.addListener(new ChannelFutureListener() {
                                @Override
                                public void operationComplete(ChannelFuture future)
                                        throws Exception {
                                    if (!future.isSuccess()) {
                                        currentEvent.getFuture().setFailure(future.getCause());
                                        closeInput((ChunkedInput) currentEvent.getMessage());
                                    }
                                }
                            });
                        }


                        Channels.write(
                                ctx, writeFuture, chunk,
                                currentEvent.getRemoteAddress());
                    }
                } else {
                    this.currentEvent = null;
                    ctx.sendDownstream(currentEvent);
                }

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        if (!(evt instanceof MessageEvent)) {
            ctx.sendDownstream(evt);
            return;
        }


        MessageEvent e = (MessageEvent) evt;
        Object originalMessage = e.getMessage();
        if (originalMessage instanceof FileRegion) {


            FileRegion fr = (FileRegion) originalMessage;
            WritableByteChannel bchannel = new ChannelWritableByteChannel(ctx, e);

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        if (!(evt instanceof MessageEvent)) {
            context.sendDownstream(evt);
            return;
        }


        MessageEvent e = (MessageEvent) evt;
        if (!(e.getMessage() instanceof ChannelBuffer)) {
            context.sendDownstream(evt);
            return;
        }


        // Do not encrypt the first write request if this handler is
        // created with startTLS flag turned on.
        if (startTls && sentFirstMessage.compareAndSet(false, true)) {
            context.sendDownstream(evt);
            return;
        }


        // Otherwise, all messages are encrypted.
        ChannelBuffer msg = (ChannelBuffer) e.getMessage();
        PendingWrite pendingWrite;


        if (msg.readable()) {
            pendingWrite = new PendingWrite(evt.getFuture(), msg.toByteBuffer(msg.readerIndex(), msg.readableBytes()));
        } else {

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                                future = succeededFuture(channel);
                            } else {
                                future = pendingWrite.future;
                            }


                            MessageEvent encryptedWrite = new DownstreamMessageEvent(
                                    channel, future, msg, channel.getRemoteAddress());
                            offerEncryptedWriteRequest(encryptedWrite);
                            offered = true;
                        } else if (result.getStatus() == Status.CLOSED) {
                            // SSLEngine has been closed already.

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        if (!pendingEncryptedWritesLock.tryLock()) {
            return;
        }


        try {
            MessageEvent e;
            while ((e = pendingEncryptedWrites.poll()) != null) {
                ctx.sendDownstream(e);
            }
        } finally {
            pendingEncryptedWritesLock.unlock();

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                // Unsupported - discard silently.
                future.setSuccess();
                break;
            }
        } else if (e instanceof MessageEvent) {
            MessageEvent event = (MessageEvent) e;
            DefaultLocalChannel channel = (DefaultLocalChannel) event.getChannel();
            boolean offered = channel.writeBuffer.offer(event);
            assert offered;
            channel.flushWriteBuffer();
        }
    }

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io.netty.channel.iostream.IoStreamChannelSink

io.netty.channel.local.DefaultLocalChannel

io.netty.channel.local.LocalClientChannelSink

io.netty.channel.local.LocalServerChannelSink

io.netty.channel.rxtx.RxtxChannelSink

io.netty.channel.sctp.SctpChannelImpl$WriteRequestQueue

io.netty.channel.sctp.SctpClientPipelineSink

io.netty.channel.sctp.SctpServerPipelineSink

io.netty.channel.sctp.SctpWorker

io.netty.channel.socket.nio.AbstractNioChannel$WriteRequestQueue

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