List of usage examples for java.nio.channels DatagramChannel open
public static DatagramChannel open() throws IOException
From source file:org.openhab.binding.keba.handler.KeContactHandler.java
private void establishConnection() { lock.lock();// w w w . j a va 2 s .c o m try { if (getThing().getStatusInfo().getStatusDetail() != ThingStatusDetail.CONFIGURATION_ERROR && getConfig().get(IP_ADDRESS) != null && !getConfig().get(IP_ADDRESS).equals("")) { try { datagramChannel = DatagramChannel.open(); } catch (Exception e2) { updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An exception occurred while opening a datagram channel"); } try { datagramChannel.configureBlocking(false); } catch (IOException e2) { updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An exception occurred while configuring a datagram channel"); } synchronized (selector) { selector.wakeup(); int interestSet = SelectionKey.OP_READ | SelectionKey.OP_WRITE; try { datagramChannelKey = datagramChannel.register(selector, interestSet); } catch (ClosedChannelException e1) { updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An exception occurred while registering a selector"); } InetSocketAddress remoteAddress = new InetSocketAddress((String) getConfig().get(IP_ADDRESS), REMOTE_PORT_NUMBER); try { logger.trace("Connecting the channel for {} ", remoteAddress); datagramChannel.connect(remoteAddress); onConnectionResumed(); } catch (Exception e) { logger.error("An exception occurred while connecting connecting to '{}:{}' : {}", new Object[] { (String) getConfig().get(IP_ADDRESS), REMOTE_PORT_NUMBER, e.getMessage() }); updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An exception occurred while connecting"); } } } else { updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.CONFIGURATION_ERROR, getThing().getStatusInfo().getDescription()); } } finally { lock.unlock(); } }
From source file:org.apache.hama.monitor.fd.UDPSupervisor.java
/** * UDP Supervisor.//from w ww.j av a 2 s. c o m */ public UDPSupervisor(HamaConfiguration conf) { DatagramChannel ch = null; try { ch = DatagramChannel.open(); } catch (IOException ioe) { LOG.error("Fail to open udp channel.", ioe); } this.channel = ch; if (null == this.channel) throw new NullPointerException("Channel can not be opened."); try { this.channel.socket().bind(new InetSocketAddress(conf.getInt("bsp.monitor.fd.udp_port", 16384))); } catch (SocketException se) { LOG.error("Unable to bind the udp socket.", se); } WINDOW_SIZE.set(conf.getInt("bsp.monitor.fd.window_size", 100)); this.receiver = Executors.newCachedThreadPool(); this.supervisor = Executors.newSingleThreadExecutor(); this.watcher = Executors.newSingleThreadScheduledExecutor(); }
From source file:org.mobicents.media.server.impl.rtcp.RtcpHandlerTest.java
@Test public void testRtcpSend() throws IOException, InterruptedException { /* GIVEN *//* ww w .ja va2 s. c o m*/ SnifferChannel recvChannel = new SnifferChannel(); recvChannel.open(); recvChannel.bind(new InetSocketAddress("127.0.0.1", 0)); DatagramChannel sendChannel = DatagramChannel.open(); sendChannel.bind(new InetSocketAddress("127.0.0.1", 0)); recvChannel.connect(sendChannel.getLocalAddress()); sendChannel.connect(recvChannel.getLocalAddress()); /* WHEN */ handler.setChannel(sendChannel); handler.joinRtpSession(); recvChannel.start(); new Thread(recvChannel).start(); Thread.sleep(15000); handler.leaveRtpSession(); Thread.sleep(5000); recvChannel.stop(); /* THEN */ Assert.assertTrue(recvChannel.rxPackets > 0); Assert.assertTrue(recvChannel.rxOctets > 0); Assert.assertEquals(recvChannel.rxPackets, statistics.getRtcpPacketsSent()); Assert.assertEquals(recvChannel.rxOctets, statistics.getRtcpOctetsSent()); }
From source file:org.openhab.binding.mart.handler.martHandler.java
/** * establishes a connection for reading and writing *//*from w w w . ja v a2 s . c o m*/ private void establishConnection() { lock.lock(); try { // returns the thing which belongs to the handler // gets the status information of the thing // gets the detail of the status and checks if there are no configuration errors // and checks if the ipAddress is not null or empty if (getThing().getStatusInfo().getStatusDetail() != ThingStatusDetail.CONFIGURATION_ERROR && getConfig().get(IP_ADDRESS) != null || getConfig().get(IP_ADDRESS) != "") { try { // opens a datagram channel datagramChannel = DatagramChannel.open(); } catch (Exception e) { // updates the status of the thing updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An exception occurred while creating a datagram channel"); } try { // The Channel must be in non-blocking mode to be used with a Selector datagramChannel.configureBlocking(false); } catch (IOException e) { // updates the status of the thing updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An error occurred while creating a datagram channel"); } synchronized (selector) { selector.wakeup(); // The interest set is the set of events you are interested in "selecting" int interestSet = SelectionKey.OP_READ | SelectionKey.OP_WRITE; try { // registers this channel with the given selector, returning a selectionKey datagramChannelKey = datagramChannel.register(selector, interestSet); } catch (ClosedChannelException e) { // updates the status of the thing updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, "An exception occured while registering a channel"); } // creating an IP Socket Address (remoteAddress) for the remote port number InetSocketAddress remoteAddress = new InetSocketAddress((String) getConfig().get(IP_ADDRESS), REMOTE_PORT_NUMBER); try { logger.trace("Connecting to the channel for {}", remoteAddress); // connects this channel's socket to the given remote peer address datagramChannel.connect(remoteAddress); // after connection update the status of the thing to Online onConnectionResumed(); } catch (Exception e) { logger.error("An error occured while connecting connecting to '{}:{}' : {}", new Object[] { (String) getConfig().get(IP_ADDRESS) }, REMOTE_PORT_NUMBER, e.getMessage()); // update the status of the thing updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, " An excepton ocurred while connecting"); } } } else { // update the status of the thing updateStatus(ThingStatus.OFFLINE, ThingStatusDetail.COMMUNICATION_ERROR, getThing().getStatusInfo().getDescription()); } } finally { lock.unlock(); } }
From source file:org.openhab.binding.tcp.AbstractDatagramChannelBinding.java
protected void configureListenerChannel() { // open the listener port try {/*ww w .j a va 2s.c o m*/ listenerChannel = DatagramChannel.open(); listenerChannel.socket().bind(new InetSocketAddress(listenerPort)); listenerChannel.configureBlocking(false); logger.info("Listening for incoming data on {}", listenerChannel.getLocalAddress()); synchronized (selector) { selector.wakeup(); try { listenerKey = listenerChannel.register(selector, listenerChannel.validOps()); } catch (ClosedChannelException e1) { logger.error("An exception occurred while registering a selector: {}", e1.getMessage()); } } } catch (Exception e3) { logger.error("An exception occurred while creating the Listener Channel on port number {} ({})", listenerPort, e3.getMessage()); } }
From source file:org.openhab.binding.tcp.AbstractDatagramChannelBinding.java
/** * @{inheritDoc}/* www . j a va 2 s . com*/ */ @Override protected void execute() { // Cycle through the Items and setup channels if required for (P provider : providers) { for (String itemName : provider.getItemNames()) { for (Command aCommand : ((P) provider).getAllCommands(itemName)) { String remoteHost = ((P) provider).getHost(itemName, aCommand); String remotePort = ((P) provider).getPortAsString(itemName, aCommand); Direction direction = ((P) provider).getDirection(itemName, aCommand); InetSocketAddress remoteAddress = null; if (!(remoteHost.equals("*") || remotePort.equals("*"))) { remoteAddress = new InetSocketAddress(remoteHost, Integer.parseInt(remotePort)); } Channel newChannel = null; Channel existingChannel = null; if (useAddressMask && (remoteHost.equals("*") || remotePort.equals("*"))) { newChannel = new Channel(itemName, aCommand, remoteHost, remotePort, ((P) provider).getDirection(itemName, aCommand), false, null, false, null); existingChannel = channels.get(itemName, aCommand, direction, remoteHost, remotePort); } else { newChannel = new Channel(itemName, aCommand, remoteAddress, ((P) provider).getDirection(itemName, aCommand), false, null, false, null); existingChannel = channels.get(itemName, aCommand, direction, remoteAddress); } if (existingChannel == null) { if (direction == Direction.IN) { boolean assigned = false; if (useAddressMask && (remoteHost.equals("*") || remotePort.equals("*"))) { logger.warn( "When using address masks we will not verify if we are already listening to similar incoming connections"); logger.info("We will accept data coming from the remote end {}:{}", remoteHost, remotePort); } else { if (channels.contains(itemName, aCommand, Direction.IN, remoteAddress)) { logger.warn("We already listen for incoming connections from {}", remoteAddress); } else { if (itemShareChannels) { Channel firstChannel = channels.getFirstServed(itemName, direction, remoteAddress); if (firstChannel != null) { newChannel.channel = firstChannel.channel; assigned = true; } } if (bindingShareChannels) { Channel firstChannel = channels.getFirstServed(direction, remoteAddress); if (firstChannel != null) { newChannel.channel = firstChannel.channel; assigned = true; } } if (directionsShareChannels) { Channel firstChannel = channels.getFirstServed(remoteAddress); if (firstChannel != null) { newChannel.channel = firstChannel.channel; assigned = true; } } } } if (!assigned) { newChannel.channel = listenerChannel; } if (useAddressMask && (remoteHost.equals("*") || remotePort.equals("*"))) { logger.info("We will accept data coming from the remote end with mask {}:{}", remoteHost, remotePort); } else { logger.info("We will accept data coming from the remote end {}", remoteAddress); } logger.debug("Setting up the inbound channel {}", newChannel); channels.add(newChannel); } else if (direction == Direction.OUT) { boolean assigned = false; if (useAddressMask && (remoteHost.equals("*") || remotePort.equals("*"))) { logger.error( "We do not accept outgoing connections for Items that do use address masks"); } else { channels.add(newChannel); if (newChannel.channel == null) { if (itemShareChannels) { Channel firstChannel = channels.getFirstServed(itemName, direction, remoteAddress); if (firstChannel != null) { newChannel.channel = firstChannel.channel; assigned = true; } } if (bindingShareChannels) { Channel firstChannel = channels.getFirstServed(direction, remoteAddress); if (firstChannel != null) { newChannel.channel = firstChannel.channel; assigned = true; } } // I think it is better not to share incoming connections with outgoing connections (in the case of the // UDP binding) // if(directionsShareChannels) { // Channel firstChannel = channels.getFirstServed(remoteAddress); // if(firstChannel != null) { // newChannel.channel = firstChannel.channel; // assigned = true; // } // if (assigned) { logger.debug("Setting up the outbound assigned channel {} ", newChannel); } } synchronized (this) { if (!assigned || newChannel.channel == null) { DatagramChannel newDatagramChannel = null; try { newDatagramChannel = DatagramChannel.open(); } catch (IOException e2) { logger.error("An exception occurred while opening a channel: {}", e2.getMessage()); } try { newDatagramChannel.configureBlocking(false); //setKeepAlive(true); } catch (IOException e) { logger.error("An exception occurred while configuring a channel: {}", e.getMessage()); } synchronized (selector) { selector.wakeup(); try { newDatagramChannel.register(selector, newDatagramChannel.validOps()); } catch (ClosedChannelException e1) { logger.error( "An exception occurred while registering a selector: {}", e1.getMessage()); } } newChannel.channel = newDatagramChannel; logger.debug("Setting up the outbound channel {}", newChannel); try { logger.info("'Connecting' the channel {} ", newChannel); newDatagramChannel.connect(remoteAddress); } catch (IOException e) { logger.error("An exception occurred while connecting a channel: {}", e.getMessage()); } } else { logger.info("There is already an active channel {} for the remote end {}", newChannel.channel, newChannel.remote); } } } } } } } } // Check on channels for which we have to process data synchronized (selector) { try { // Wait for an event selector.selectNow(); } catch (IOException e) { logger.error("An exception occurred while Selecting ({})", e.getMessage()); } } // Get list of selection keys with pending events Iterator<SelectionKey> it = selector.selectedKeys().iterator(); // Process each key at a time while (it.hasNext()) { SelectionKey selKey = (SelectionKey) it.next(); it.remove(); if (selKey.isValid()) { DatagramChannel theDatagramChannel = (DatagramChannel) selKey.channel(); Channel theChannel = channels.get(theDatagramChannel); if (selKey.isReadable()) { InetSocketAddress clientAddress = null; ByteBuffer readBuffer = ByteBuffer.allocate(maximumBufferSize); int numberBytesRead = 0; boolean error = false; if (selKey == listenerKey) { try { clientAddress = (InetSocketAddress) theDatagramChannel.receive(readBuffer); logger.debug("Received {} on the listener port from {}", new String(readBuffer.array()), clientAddress); numberBytesRead = readBuffer.position(); } catch (Exception e) { error = true; } } else { try { //TODO: Additional code to split readBuffer in multiple parts, in case the data send by the remote end is not correctly fragemented. Could be handed of to implementation class if for example, the buffer needs to be split based on a special character like line feed or carriage return numberBytesRead = theDatagramChannel.read(readBuffer); logger.debug("Received {} bytes ({}) on the channel {}->{}", new Object[] { numberBytesRead, new String(readBuffer.array()), theDatagramChannel.getLocalAddress(), theDatagramChannel.getRemoteAddress() }); } catch (NotYetConnectedException e) { try { logger.warn("The channel for {} has no connection pending ({})", theDatagramChannel.getRemoteAddress(), e.getMessage()); } catch (IOException e1) { logger.error( "An exception occurred while getting the remote address of channel {} ({})", theDatagramChannel, e1.getMessage()); } error = true; } catch (IOException e) { // If some other I/O error occurs try { logger.warn("The channel for {} has encountered an unknown IO Exception: {}", theDatagramChannel.getRemoteAddress(), e.getMessage()); } catch (IOException e1) { logger.error( "An exception occurred while getting the remote address of channel {} ({})", theDatagramChannel, e1.getMessage()); } error = true; } } if (numberBytesRead == -1) { try { if (selKey != listenerKey) { theDatagramChannel.close(); } } catch (IOException e) { try { logger.warn("The channel for {} is closed ({})", theDatagramChannel.getRemoteAddress(), e.getMessage()); } catch (IOException e1) { logger.error( "An exception occurred while getting the remote address of channel {} ({})", theDatagramChannel, e1.getMessage()); } } error = true; } if (error) { if (selKey != listenerKey) { Scheduler scheduler = null; try { scheduler = StdSchedulerFactory.getDefaultScheduler(); } catch (SchedulerException e1) { logger.error("An exception occurred while getting the Quartz scheduler: {}", e1.getMessage()); } JobDataMap map = new JobDataMap(); map.put("Channel", theChannel); map.put("Binding", this); JobDetail job = null; Trigger trigger = null; job = newJob(ReconnectJob.class) .withIdentity(Integer.toHexString(hashCode()) + "-Reconnect-" + Long.toString(System.currentTimeMillis()), this.toString()) .usingJobData(map).build(); trigger = newTrigger() .withIdentity(Integer.toHexString(hashCode()) + "-Reconnect-" + Long.toString(System.currentTimeMillis()), this.toString()) .startAt(futureDate(reconnectInterval, IntervalUnit.SECOND)).build(); try { if (job != null && trigger != null && selKey != listenerKey) { if (!theChannel.isReconnecting) { channels.setAllReconnecting(theDatagramChannel, true); scheduler.scheduleJob(job, trigger); } } } catch (SchedulerException e) { logger.error( "An exception occurred while scheduling a job with the Quartz Scheduler {}", e.getMessage()); } } } else { ArrayList<Channel> channelsToServe = new ArrayList<Channel>(); if (selKey == listenerKey) { channelsToServe = channels.getAll(Direction.IN, clientAddress); if (channelsToServe.size() == 0) { logger.warn( "Received data {} from an undefined remote end {}. We will not process it", new String(readBuffer.array()), clientAddress); } } else { channelsToServe = channels.getAll(theDatagramChannel); } if (channelsToServe.size() > 0) { readBuffer.flip(); if (channels.isBlocking(theDatagramChannel)) { // if we are in a blocking operation, we get are now finished and we have to reset the flag. The read buffer will be returned to the instance // that initiated the write opreation - it has to parse the buffer itself //find the Channel with this DGC that is holding a Blocking flag theChannel = channels.getBlocking(theDatagramChannel); theChannel.buffer = readBuffer; } else { for (Channel aChannel : channelsToServe) { if (useAddressMask) { aChannel.lastRemote = clientAddress; } // if not, then we parse the buffer as ususal parseChanneledBuffer(aChannel, readBuffer); } } } else { try { if (selKey == listenerKey) { logger.warn( "No channel is active or defined for the data we received from {}. It will be discarded.", clientAddress); } else { logger.warn( "No channel is active or defined for the data we received from {}. It will be discarded.", theDatagramChannel.getRemoteAddress()); } } catch (IOException e) { logger.error( "An exception occurred while getting the remote address of channel {} ({})", theDatagramChannel, e.getMessage()); } } } } else if (selKey.isWritable()) { WriteBufferElement theElement = null; if (selKey == listenerKey) { Iterator<WriteBufferElement> iterator = writeQueue.iterator(); while (iterator.hasNext()) { WriteBufferElement anElement = iterator.next(); if (anElement.channel.channel.equals(listenerChannel)) { theElement = anElement; break; } } } //check if any of the Channel using the DatagramChannel is blocking the DGC in a R/W operation boolean isBlocking = channels.isBlocking(theDatagramChannel); if (isBlocking) { // if this channel is already flagged as being in a blocked write/read operation, we skip this selKey } else { if (selKey != listenerKey) { Iterator<WriteBufferElement> iterator = writeQueue.iterator(); while (iterator.hasNext()) { WriteBufferElement anElement = iterator.next(); if (anElement.channel.channel.equals(theDatagramChannel)) { theElement = anElement; break; } } } if (theElement != null && theElement.buffer != null) { logger.debug("Picked {} from the queue", theElement); if (theElement.isBlocking) { theElement.channel.isBlocking = true; } boolean error = false; theElement.buffer.rewind(); if (selKey == listenerKey) { try { if (useAddressMask && theElement.channel.remote == null) { if (theElement.channel.lastRemote != null) { logger.debug( "Sending {} for the masked inbound channel {}:{} to the remote address {}", new Object[] { new String(theElement.buffer.array()), theElement.channel.host, theElement.channel.port, theElement.channel.lastRemote }); listenerChannel.send(theElement.buffer, theElement.channel.lastRemote); } else { logger.warn("I do not know where to send the data {}", new String(theElement.buffer.array())); } } else { logger.debug( "Sending {} for the inbound channel {}:{} to the remote address {}", new Object[] { new String(theElement.buffer.array()), theElement.channel.host, theElement.channel.port, theElement.channel.remote }); listenerChannel.send(theElement.buffer, theElement.channel.remote); } } catch (IOException e) { if (theElement.channel.lastRemote != null) { logger.error( "An exception occurred while sending data to the remote end {} ({})", theElement.channel.lastRemote, e.getMessage()); } else { logger.error( "An exception occurred while sending data to the remote end {} ({})", theElement.channel.remote, e.getMessage()); } } } else { try { logger.debug( "Sending {} for the outbound channel {}:{} to the remote address {}", new Object[] { new String(theElement.buffer.array()), theElement.channel.host, theElement.channel.port, theElement.channel.remote }); theDatagramChannel.write(theElement.buffer); } catch (NotYetConnectedException e) { logger.warn("The channel for {} has no connection pending ({})", theElement.channel.remote, e.getMessage()); error = true; } catch (ClosedChannelException e) { // If some other I/O error occurs logger.warn("The channel for {} is closed ({})", theElement.channel.remote, e.getMessage()); error = true; } catch (IOException e) { // If some other I/O error occurs logger.warn("The channel for {} has encountered an unknown IO Exception: {}", theElement.channel.remote, e.getMessage()); error = true; } } if (error) { if (selKey != listenerKey) { Scheduler scheduler = null; try { scheduler = StdSchedulerFactory.getDefaultScheduler(); } catch (SchedulerException e1) { logger.error("An exception occurred while getting the Quartz scheduler: {}", e1.getMessage()); } JobDataMap map = new JobDataMap(); map.put("Channel", theElement.channel); map.put("Binding", this); JobDetail job = null; Trigger trigger = null; job = newJob(ReconnectJob.class) .withIdentity( Integer.toHexString(hashCode()) + "-Reconnect-" + Long.toString(System.currentTimeMillis()), this.toString()) .usingJobData(map).build(); trigger = newTrigger() .withIdentity( Integer.toHexString(hashCode()) + "-Reconnect-" + Long.toString(System.currentTimeMillis()), this.toString()) .startAt(futureDate(reconnectInterval, IntervalUnit.SECOND)).build(); try { if (job != null && trigger != null && selKey != listenerKey) { if (!theElement.channel.isReconnecting) { channels.setAllReconnecting(theElement.channel.channel, true); scheduler.scheduleJob(job, trigger); } } } catch (SchedulerException e) { logger.error( "An exception occurred while scheduling a job with the Quartz Scheduler {}", e.getMessage()); } } } else { if (theElement != null) { writeQueue.remove(theElement); } } } } } } } }