Package org.apache.activemq.command

Examples of org.apache.activemq.command.Command

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    /**
     * @param o - the command to consume
     */
    public void onCommand(final Object o) {
        final Command command = (Command)o;
        if (!closed.get() && command != null) {
            try {
                command.visit(new CommandVisitorAdapter() {
                    @Override
                    public Response processMessageDispatch(MessageDispatch md) throws Exception {
                        ActiveMQDispatcher dispatcher = dispatchers.get(md.getConsumerId());
                        if (dispatcher != null) {
                            // Copy in case a embedded broker is dispatching via
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    public void setMaxReconnectAttempts(int maxReconnectAttempts) {
        this.maxReconnectAttempts = maxReconnectAttempts;
    }

    public void oneway(Object o) throws IOException {
        final Command command = (Command)o;
        try {
            synchronized (reconnectMutex) {

                // Wait for transport to be connected.
                while (connectedCount < minAckCount && !disposed && connectionFailure == null) {
                    LOG.debug("Waiting for at least " + minAckCount + " transports to be connected.");
                    reconnectMutex.wait(1000);
                }

                // Still not fully connected.
                if (connectedCount < minAckCount) {

                    Exception error;

                    // Throw the right kind of error..
                    if (disposed) {
                        error = new IOException("Transport disposed.");
                    } else if (connectionFailure != null) {
                        error = connectionFailure;
                    } else {
                        error = new IOException("Unexpected failure.");
                    }

                    if (error instanceof IOException) {
                        throw (IOException)error;
                    }
                    throw IOExceptionSupport.create(error);
                }

                // If it was a request and it was not being tracked by
                // the state tracker,
                // then hold it in the requestMap so that we can replay
                // it later.
                boolean fanout = isFanoutCommand(command);
                if (stateTracker.track(command) == null && command.isResponseRequired()) {
                    int size = fanout ? minAckCount : 1;
                    requestMap.put(new Integer(command.getCommandId()), new RequestCounter(command, size));
                }
               
                // Send the message.
                if (fanout) {
                    for (Iterator<FanoutTransportHandler> iter = transports.iterator(); iter.hasNext();) {
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        super(next);
        this.sequenceGenerator = sequenceGenerator;
    }

    public void oneway(Object o) throws IOException {
        Command command = (Command)o;
        command.setCommandId(sequenceGenerator.getNextSequenceId());
        command.setResponseRequired(false);
        next.oneway(command);
    }
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        command.setResponseRequired(false);
        next.oneway(command);
    }

    public FutureResponse asyncRequest(Object o, ResponseCallback responseCallback) throws IOException {
        Command command = (Command)o;
        command.setCommandId(sequenceGenerator.getNextSequenceId());
        command.setResponseRequired(true);
        FutureResponse future = new FutureResponse(responseCallback);
        synchronized (requestMap) {
            if( this.error !=null ) {
                throw error;
            }
            requestMap.put(new Integer(command.getCommandId()), future);
        }
        next.oneway(command);
        return future;
    }
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        FutureResponse response = asyncRequest(command, null);
        return response.getResult(timeout);
    }

    public void onCommand(Object o) {
        Command command = (Command)o;
        if (command.isResponse()) {
            Response response = (Response)command;
            FutureResponse future = null;
            synchronized (requestMap) {
                future = requestMap.remove(Integer.valueOf(response.getCorrelationId()));
            }
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        public FanoutTransportHandler(URI uri) {
            this.uri = uri;
        }

        public void onCommand(Object o) {
            Command command = (Command)o;
            if (command.isResponse()) {
                Integer id = new Integer(((Response)command).getCorrelationId());
                RequestCounter rc = requestMap.get(id);
                if (rc != null) {
                    if (rc.ackCount.decrementAndGet() <= 0) {
                        requestMap.remove(id);
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    public void stop() throws Exception {
        bufferPool.stop();
    }

    public Command read() throws IOException {
        Command answer = null;
        Endpoint from = null;
        synchronized (readLock) {
            while (true) {
                readBuffer.clear();
                SocketAddress address = channel.receive(readBuffer);

                readBuffer.flip();

                if (readBuffer.limit() == 0) {
                    continue;
                }
                from = headerMarshaller.createEndpoint(readBuffer, address);

                int remaining = readBuffer.remaining();
                byte[] data = new byte[remaining];
                readBuffer.get(data);

                // TODO could use a DataInput implementation that talks direct
                // to
                // the ByteBuffer to avoid object allocation and unnecessary
                // buffering?
                DataInputStream dataIn = new DataInputStream(new ByteArrayInputStream(data));
                answer = (Command)wireFormat.unmarshal(dataIn);
                break;
            }
        }
        if (answer != null) {
            answer.setFrom(from);

            if (LOG.isDebugEnabled()) {
                LOG.debug("Channel: " + name + " received from: " + from + " about to process: " + answer);
            }
        }
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    public void stop() throws Exception {
    }

    public Command read() throws IOException {
        Command answer = null;
        Endpoint from = null;
        synchronized (readLock) {
            while (true) {
                DatagramPacket datagram = createDatagramPacket();
                channel.receive(datagram);

                // TODO could use a DataInput implementation that talks direct
                // to the byte[] to avoid object allocation
                DataInputStream dataIn = new DataInputStream(new ByteArrayInputStream(datagram.getData()));

                from = headerMarshaller.createEndpoint(datagram, dataIn);
                answer = (Command)wireFormat.unmarshal(dataIn);
                break;
            }
        }
        if (answer != null) {
            answer.setFrom(from);

            if (LOG.isDebugEnabled()) {
                LOG.debug("Channel: " + name + " about to process: " + answer);
            }
        }
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        }
        super.oneway(command);
    }

    public void onCommand(Object o) {
        Command command = (Command)o;
        if (command.isWireFormatInfo()) {
            WireFormatInfo info = (WireFormatInfo)command;
            if (LOG.isDebugEnabled()) {
                LOG.debug("Received WireFormat: " + info);
            }
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    protected void doStart() throws Exception {
        LOG.info("Starting " + this);

        configuredTransport.setTransportListener(new TransportListener() {
            public void onCommand(Object o) {
                final Command command = (Command)o;
                processInboundConnection(command);
            }

            public void onException(IOException error) {
                LOG.error("Caught: " + error, error);
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Related Classes of org.apache.activemq.command.Command

  • org.apache.activemq.ActiveMQConnection
  • org.apache.activemq.broker.ft.MasterConnector
  • org.apache.activemq.broker.TransportConnection
  • org.apache.activemq.network.DemandForwardingBridgeSupport
  • org.apache.activemq.network.ForwardingBridge
  • org.apache.activemq.openwire.CommandIdComparator
  • org.apache.activemq.state.ConnectionStateTracker
  • org.apache.activemq.transport.amqp.AmqpTransportFilter
  • org.apache.activemq.transport.CommandJoiner
  • org.apache.activemq.transport.failover.FailoverTransport
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