Java Code Examples for io.netty.channel.ChannelHandlerContext#writeAndFlush()

The following examples show how to use io.netty.channel.ChannelHandlerContext#writeAndFlush() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: LocalTransportThreadModelTest.java From netty-4.1.22 with Apache License 2.0

6 votes

@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
    Assert.assertSame(t, Thread.currentThread());

    // Don't let the write request go to the server-side channel - just swallow.
    boolean swallow = this == ctx.pipeline().first();

    ByteBuf m = (ByteBuf) msg;
    int count = m.readableBytes() / 4;
    for (int j = 0; j < count; j ++) {
        int actual = m.readInt();
        int expected = outCnt ++;
        Assert.assertEquals(expected, actual);
        if (!swallow) {
            ctx.write(actual);
        }
    }
    ctx.writeAndFlush(Unpooled.EMPTY_BUFFER, promise);
    m.release();
}

Example 2

Source File: TimeServerHandler.java From learning-code with Apache License 2.0

6 votes

@Override
public void channelActive(final ChannelHandlerContext ctx) {
    //channelActive 在建立连接,准备通信的时候被调用
    // 构建一个 4 字节, 32 位整数的消息
    final ByteBuf time = ctx.alloc().buffer(4);
    time.writeInt((int) (System.currentTimeMillis() / 1000L + 123456789L));
    // 因为 netty 里面所有的操作都是异步的,所有的操作不是立即执行的,这里返回一个 还没有发生 I/O 操作
    final ChannelFuture f = ctx.writeAndFlush(time);
    // 由于 Netty 里面所有逇操作都是异步的, 直接 close channel 会导致消息还没发送,就关闭连接了,我们需要一个监听者,在它写操作完成后,通知我们去关闭通信连接
    f.addListener(ChannelFutureListener.CLOSE);
    // 下面是自定义的监听器
    /*f.addListener((ChannelFutureListener) future -> {
        assert f == future;
        ctx.close();
    });*/
}

Example 3

Source File: LocalTransportThreadModelTest.java From netty4.0.27Learn with Apache License 2.0

6 votes

@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
    Assert.assertSame(t, Thread.currentThread());

    // Don't let the write request go to the server-side channel - just swallow.
    boolean swallow = this == ctx.pipeline().first();

    ByteBuf m = (ByteBuf) msg;
    int count = m.readableBytes() / 4;
    for (int j = 0; j < count; j ++) {
        int actual = m.readInt();
        int expected = outCnt ++;
        Assert.assertEquals(expected, actual);
        if (!swallow) {
            ctx.write(actual);
        }
    }
    ctx.writeAndFlush(Unpooled.EMPTY_BUFFER, promise);
    m.release();
}

Example 4

Source File: BaseWebSocketServerHandler.java From arcusplatform with Apache License 2.0

6 votes

protected void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame frame) {
   if (frame instanceof PingWebSocketFrame) {
      if (logger.isTraceEnabled()) {
         logger.trace("Ping with payload [{}]", ByteBufUtil.hexDump(frame.content()));
      }

      PongWebSocketFrame pong = new PongWebSocketFrame(frame.content().retain());
      ctx.writeAndFlush(pong);
   }
   else if (frame instanceof PongWebSocketFrame) {
      PingPong pingPongSession = PingPong.get(ctx.channel());
      if (pingPongSession != null) {
         pingPongSession.recordPong();
      }
   }
   else {
      throw new UnsupportedOperationException(String.format("%s frame types not supported", frame.getClass()
            .getName()));
   }
}

Example 5

Source File: AbstractSendMessageProcessor.java From DDMQ with Apache License 2.0

5 votes

protected void doResponse(ChannelHandlerContext ctx, RemotingCommand request,
    final RemotingCommand response) {
    if (!request.isOnewayRPC()) {
        try {
            ctx.writeAndFlush(response);
        } catch (Throwable e) {
            log.error("SendMessageProcessor process request over, but response failed", e);
            log.error(request.toString());
            log.error(response.toString());
        }
    }
}

Example 6

Source File: PeerChannelHandler.java From p2p with Apache License 2.0

5 votes

@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
    LOGGER.debug("Channel active {}", ctx.channel().remoteAddress());
    final Connection connection = new Connection(ctx);
    getSessionAttribute(ctx).set(connection);
    ctx.writeAndFlush(new Handshake(config.getPeerName(), peer.getLeaderName()));
}

Example 7

Source File: HttpCacheServerHandler.java From bazel with Apache License 2.0

5 votes

private static void sendError(
    ChannelHandlerContext ctx, FullHttpRequest request, HttpResponseStatus status) {
  ByteBuf data = Unpooled.copiedBuffer("Failure: " + status + "\r\n", CharsetUtil.UTF_8);
  FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status, data);
  response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/plain; charset=UTF-8");
  response.headers().set(HttpHeaderNames.CONTENT_LENGTH, data.readableBytes());
  ChannelFuture future = ctx.writeAndFlush(response);

  if (!HttpUtil.isKeepAlive(request)) {
    future.addListener(ChannelFutureListener.CLOSE);
  }
}

Example 8

Source File: OnMessageController.java From spring-boot-netty with MIT License

5 votes

@NettyOnMessage(serverName = "server1", priority = 2)
void onMessage1(final ChannelHandlerContext ctx, final Channel channel, @NettyMessageBody final Long msg) {
    calls.add(ON_MESSAGE1);
    counter.arrive();

    ctx.writeAndFlush(msg + 1);
    channel.writeAndFlush(msg + 2);
}

Example 9

Source File: MobileUpdateDashLogic.java From blynk-server with GNU General Public License v3.0

5 votes

public static void messageReceived(Holder holder, ChannelHandlerContext ctx,
                                   MobileStateHolder state, StringMessage message) {
    String dashString = message.body;

    if (dashString == null || dashString.isEmpty()) {
        throw new IllegalCommandException("Income create dash message is empty.");
    }

    if (dashString.length() > holder.limits.profileSizeLimitBytes) {
        throw new NotAllowedException("User dashboard is larger then limit.", message.id);
    }

    log.debug("Trying to parse user dash : {}", dashString);
    DashBoard updatedDash = JsonParser.parseDashboard(dashString, message.id);

    if (updatedDash == null) {
        throw new IllegalCommandException("Project parsing error.");
    }

    log.debug("Saving dashboard.");

    User user = state.user;

    DashBoard existingDash = user.profile.getDashByIdOrThrow(updatedDash.id);

    TimerWorker timerWorker = holder.timerWorker;
    timerWorker.deleteTimers(state.userKey, existingDash);
    updatedDash.addTimers(timerWorker, state.userKey);

    existingDash.updateFields(updatedDash);
    user.profile.cleanPinStorage(existingDash, false, true);

    user.lastModifiedTs = existingDash.updatedAt;

    ctx.writeAndFlush(ok(message.id), ctx.voidPromise());
}

Example 10

Source File: WSQueryRequestHandler.java From timely with Apache License 2.0

5 votes

@Override
protected void channelRead0(ChannelHandlerContext ctx, QueryRequest msg) throws Exception {
    try {
        String response = JsonUtil.getObjectMapper().writeValueAsString(dataStore.query(msg));
        ctx.writeAndFlush(new TextWebSocketFrame(response));
    } catch (TimelyException e) {
        if (e.getMessage().contains("No matching tags")) {
            LOG.trace(e.getMessage());
        } else {
            LOG.error(e.getMessage(), e);
        }
        ctx.writeAndFlush(new CloseWebSocketFrame(1008, e.getMessage()));
    }
}

Example 11

Source File: NettyChannelRead.java From timer with Apache License 2.0

5 votes

@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {

  //  System.out.println(IPUtils.parseChannelRemoteAddr1(ctx.channel()));
    if(log.isInfoEnabled())log.info("client rpc call");
    RpcResponse rpcResponse= (RpcResponse) handler.handle(msg);
    ctx.writeAndFlush(rpcResponse);
}

Example 12

Source File: ProtocolNegotiators.java From grpc-nebula-java with Apache License 2.0

5 votes

@Override
@SuppressWarnings("FutureReturnValueIgnored")
public void channelActive(ChannelHandlerContext ctx) throws Exception {
  // Trigger the HTTP/1.1 plaintext upgrade protocol by issuing an HTTP request
  // which causes the upgrade headers to be added
  DefaultHttpRequest upgradeTrigger =
      new DefaultHttpRequest(HttpVersion.HTTP_1_1, HttpMethod.GET, "/");
  ctx.writeAndFlush(upgradeTrigger);
  super.channelActive(ctx);
}

Example 13

Source File: MobileLoginHandler.java From blynk-server with GNU General Public License v3.0

5 votes

@Override
protected void channelRead0(ChannelHandlerContext ctx, LoginMessage message) {
    String[] messageParts = message.body.split(BODY_SEPARATOR_STRING);

    if (messageParts.length < 2) {
        log.error("Wrong income message format.");
        ctx.writeAndFlush(illegalCommand(message.id), ctx.voidPromise());
        return;
    }

    ///.trim() is not used for back compatibility
    String email = messageParts[0].toLowerCase();

    Version version = messageParts.length > 3
            ? new Version(messageParts[2], messageParts[3])
            : Version.UNKNOWN_VERSION;

    if (messageParts.length == 5) {
        if (AppNameUtil.FACEBOOK.equals(messageParts[4])) {
            facebookLogin(ctx, message.id, email, messageParts[1], version);
        } else {
            String appName = messageParts[4];
            blynkLogin(ctx, message.id, email, messageParts[1], version, appName);
        }
    } else {
        //todo this is for back compatibility
        blynkLogin(ctx, message.id, email, messageParts[1], version, AppNameUtil.BLYNK);
    }
}

Example 14

Source File: MixServerHandler.java From incubator-hivemall with Apache License 2.0

4 votes

private void mix(final ChannelHandlerContext ctx, final MixMessage requestMsg,
        final PartialResult partial, final SessionObject session) {
    final MixEventName event = requestMsg.getEvent();
    final Object feature = requestMsg.getFeature();
    final float weight = requestMsg.getWeight();
    final float covar = requestMsg.getCovariance();
    final short localClock = requestMsg.getClock();
    final int deltaUpdates = requestMsg.getDeltaUpdates();
    final boolean cancelRequest = requestMsg.isCancelRequest();

    if (deltaUpdates <= 0) {
        throw new IllegalArgumentException("Illegal deltaUpdates received: " + deltaUpdates);
    }

    MixMessage responseMsg = null;
    try {
        partial.lock();

        if (cancelRequest) {
            partial.subtract(weight, covar, deltaUpdates, scale);
        } else {
            int diffClock = partial.diffClock(localClock);
            partial.add(weight, covar, deltaUpdates, scale);

            if (diffClock >= syncThreshold) {// sync model if clock DIFF is above threshold
                float averagedWeight = partial.getWeight(scale);
                float meanCovar = partial.getCovariance(scale);
                short globalClock = partial.getClock();
                responseMsg = new MixMessage(event, feature, averagedWeight, meanCovar,
                    globalClock, 0 /* deltaUpdates */);
            }
        }

    } finally {
        partial.unlock();
    }

    if (responseMsg != null) {
        session.incrResponse();
        ctx.writeAndFlush(responseMsg);
    }
}

Example 15

Source File: EchoServerHandler.java From x-pipe with Apache License 2.0

4 votes

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
    ctx.writeAndFlush(msg);
}

Example 16

Source File: MobileLoadProfileGzippedLogic.java From blynk-server with GNU General Public License v3.0

4 votes

public static void write(ChannelHandlerContext ctx, byte[] data, int msgId) {
    if (ctx.channel().isWritable()) {
        var outputMsg = makeResponse(data, msgId);
        ctx.writeAndFlush(outputMsg, ctx.voidPromise());
    }
}

Example 17

Source File: HttpRequestHandler.java From aesh-readline with Apache License 2.0

4 votes

@Override
protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest request) throws Exception {
    if (wsUri.equalsIgnoreCase(request.getUri())) {
        ctx.fireChannelRead(request.retain());
    } else {
        if (HttpHeaders.is100ContinueExpected(request)) {
            send100Continue(ctx);
        }

        HttpResponse response = new DefaultHttpResponse(request.getProtocolVersion(), HttpResponseStatus.INTERNAL_SERVER_ERROR);

        String path = request.getUri();
        if ("/".equals(path)) {
            path = "/index.html";
        }
        URL res = HttpTtyConnection.class.getResource("/org/aesh/terminal/http" + path);
        try {
            if (res != null) {
                DefaultFullHttpResponse fullResp = new DefaultFullHttpResponse(request.getProtocolVersion(), HttpResponseStatus.OK);
                InputStream in = res.openStream();
                byte[] tmp = new byte[256];
                for (int l = 0; l != -1; l = in.read(tmp)) {
                    fullResp.content().writeBytes(tmp, 0, l);
                }
                int li = path.lastIndexOf('.');
                if (li != -1 && li != path.length() - 1) {
                    String ext = path.substring(li + 1, path.length());
                    String contentType;
                    switch (ext) {
                        case "html":
                            contentType = "text/html";
                            break;
                        case "js":
                            contentType = "application/javascript";
                            break;
                        default:
                            contentType = null;
                            break;
                    }
                    if (contentType != null) {
                        fullResp.headers().set(HttpHeaders.Names.CONTENT_TYPE, contentType);
                    }
                }
                response = fullResp;
            } else {
                response.setStatus(HttpResponseStatus.NOT_FOUND);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            ctx.write(response);
            ChannelFuture future = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
            future.addListener(ChannelFutureListener.CLOSE);
        }
    }
}

Example 18

Source File: ResponseWriter.java From bistoury with GNU General Public License v3.0

4 votes

public void writeFullResponse(ChannelHandlerContext ctx, final byte[] bytes, RemotingHeader responseHeader) {
    Datagram datagram = RemotingBuilder.buildFullResponseDatagram(responseHeader, new ResponsePayloadHolder(bytes));
    ctx.writeAndFlush(datagram);
}

Example 19

Source File: WebsocketClientOperations.java From reactor-netty with Apache License 2.0

4 votes

@Override
@SuppressWarnings("FutureReturnValueIgnored")
public void onInboundNext(ChannelHandlerContext ctx, Object msg) {
	if (msg instanceof FullHttpResponse) {
		started = true;
		channel().pipeline()
		         .remove(HttpObjectAggregator.class);
		FullHttpResponse response = (FullHttpResponse) msg;

		setNettyResponse(response);

		if (notRedirected(response)) {


			try {
				handshaker.finishHandshake(channel(), response);
				listener().onStateChange(this, HttpClientState.RESPONSE_RECEIVED);
			}
			catch (Exception e) {
				onInboundError(e);
			}
			finally {
				//Release unused content (101 status)
				response.content()
				        .release();
			}

		}
		else {
			response.content()
			        .release();
			listener().onUncaughtException(this, redirecting);
		}
		return;
	}
	if (!this.proxyPing && msg instanceof PingWebSocketFrame) {
		//"FutureReturnValueIgnored" this is deliberate
		ctx.writeAndFlush(new PongWebSocketFrame(((PingWebSocketFrame) msg).content()));
		ctx.read();
		return;
	}
	if (msg instanceof CloseWebSocketFrame &&
			((CloseWebSocketFrame)msg).isFinalFragment()) {
		if (log.isDebugEnabled()) {
			log.debug(format(channel(), "CloseWebSocketFrame detected. Closing Websocket"));
		}
		CloseWebSocketFrame close = (CloseWebSocketFrame) msg;
		sendCloseNow(new CloseWebSocketFrame(true,
				close.rsv(),
				close.content()));
		onInboundComplete();
	}
	else if (msg != LastHttpContent.EMPTY_LAST_CONTENT) {
		super.onInboundNext(ctx, msg);
	}
}

Example 20

Source File: ResponseWriter.java From bistoury with GNU General Public License v3.0

4 votes

public void writeError(ChannelHandlerContext ctx, String content, RemotingHeader requestHeader) {
    Datagram datagram = RemotingBuilder.buildResponseDatagram(ResponseCode.RESP_TYPE_EXCEPTION.getCode(), requestHeader, new ErrorResponsePayloadHolder(content));
    ctx.writeAndFlush(datagram);
}