List of usage examples for java.nio.channels SelectionKey OP_READ
int OP_READ
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From source file:de.kapsi.net.daap.nio.DaapServerNIO.java
/** * Accept an icoming connection// www . j ava2 s .co m * * @throws IOException */ private void processAccept(SelectionKey sk) throws IOException { if (!sk.isValid()) return; ServerSocketChannel ssc = (ServerSocketChannel) sk.channel(); SocketChannel channel = ssc.accept(); if (channel == null) return; if (channel.isOpen() && accept(channel.socket().getInetAddress())) { channel.configureBlocking(false); DaapConnection connection = new DaapConnectionNIO(this, channel); SelectionKey key = channel.register(selector, SelectionKey.OP_READ, connection); } else { try { channel.close(); } catch (IOException err) { LOG.error("SocketChannel.close()", err); } } }
From source file:org.openhab.binding.keba.handler.KeContactHandler.java
private void establishConnection() { lock.lock();//from ww w.j a va 2 s . com 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.commoncrawl.io.internal.NIOSocketSelector.java
/** poll method - poll the registered socket for events and potentially block for IO for the * specified timeout value /*from www . ja v a 2 s . co m*/ * * @param timeoutValue - amount of time in MS to wait (block) for IO * * */ @SuppressWarnings("unchecked") public int poll(long timeoutValue, TimeUsageDetail timeUsageDetailOut) throws IOException { long timeStart = System.currentTimeMillis(); if (_lastPollTime != -1 && (timeStart - _lastPollTime) >= 30000) { LOG.error("POLL Delta Too Long:" + (timeStart - _lastPollTime)); } _lastPollTime = timeStart; if (timeUsageDetailOut != null) { timeUsageDetailOut.blockedTime = 0; timeUsageDetailOut.unblockedTime = 0; } if (_selector == null || !_selector.isOpen()) { IOException e = new IOException("Selector NULL or Selector is Not Open!"); LOG.error(e); throw e; } processPendingRegistrations(); long timeEnd = System.currentTimeMillis(); if (timeUsageDetailOut != null) { timeUsageDetailOut.unblockedTime += (timeEnd - timeStart); } /* if (timeoutWatchSet.size() != 0) { // We have a timeout pending, so calculate the time until then and select appropriately long nextTimeout = timeoutWatchSet.first().getTimeoutTimestamp(); long selectTime = nextTimeout - System.currentTimeMillis(); if (selectTime < timeoutValue) { timeoutValue = Math.max(selectTime,0); } } */ timeStart = System.currentTimeMillis(); int count = 0; if (timeoutValue <= 0) { count = _selector.selectNow(); } else { if (timeoutValue == Long.MAX_VALUE) timeoutValue = 0; count = _selector.select(timeoutValue); } timeEnd = System.currentTimeMillis(); if (timeUsageDetailOut != null) { timeUsageDetailOut.blockedTime += (timeEnd - timeStart); } long unblockedTimeStart = System.currentTimeMillis(); // if (count != 0 ) { Set<SelectionKey> selectionSet = _selector.selectedKeys(); for (Iterator<SelectionKey> i = selectionSet.iterator(); i.hasNext();) { SelectionKey selectionKey = i.next(); i.remove(); if (selectionKey.isValid()) { Object attachment = selectionKey.attachment(); /* if (attachment instanceof TAsyncMethodCall) { transitionThriftMethod((TAsyncMethodCall)attachment,selectionKey); } */ if (attachment instanceof NIOSocket) { NIOSocket theSocket = (NIOSocket) selectionKey.attachment(); if (theSocket != null && theSocket.getListener() != null) { // reset interest ops selectionKey.interestOps(0); // process events in key ... if (selectionKey.isConnectable()) { boolean connected = false; Exception disconnectException = null; try { if (((NIOClientSocket) theSocket).finishConnect()) { connected = true; // log it ... // LOG.info("Connected to:"+((NIOClientSocket)theSocket).getSocketAddress()); // reset the selection key's ops.. otherwise, select keeps returning on an already connected socket (since we have registered for CONNECT) System.out.println( "Connected to:" + ((NIOClientSocket) theSocket).getSocketAddress()); timeStart = System.currentTimeMillis(); ((NIOClientSocketListener) theSocket.getListener()) .Connected((NIOClientSocket) theSocket); if (timeUsageDetailOut != null) { timeUsageDetailOut.timeInConnectedEvt += System.currentTimeMillis() - timeStart; } } else { //LOG.error("Failed to Connect to:"+((NIOClientSocket)theSocket).getSocketAddress() + " - finishConnect returned false"); theSocket.close(); } } catch (IOException e) { //LOG.error("Failed to Connect to:"+((NIOClientSocket)theSocket).getSocketAddress() + " with Exception:"+e); theSocket.close(); disconnectException = e; } catch (RuntimeException e) { LOG.error("Caught Runtime Exception in Connected Event:" + StringUtils.stringifyException(e)); ((NIOClientSocketListener) theSocket.getListener()) .Excepted((NIOClientSocket) theSocket, e); theSocket.close(); disconnectException = e; //KILL THE SERVER //throw e; } // if we were unable to properly establish the connection, trigger the Disconnected notification ... if (!connected) { //LOG.error("Failed to Complete Connection in Finish Connect- Calling Disconnected"); ((NIOClientSocketListener) theSocket.getListener()) .Disconnected((NIOClientSocket) theSocket, disconnectException); // continue to the next socket ... continue; } } // now always set the socket to readable state ... if ((theSocket instanceof NIOClientSocket) && selectionKey.isValid()) { selectionKey.interestOps(selectionKey.interestOps() | SelectionKey.OP_READ); } if (selectionKey.isValid() && selectionKey.isReadable()) { int bytesRead = -1; try { timeStart = System.currentTimeMillis(); // track the number of actual bytes read in the callback ... bytesRead = ((NIOClientSocketListener) theSocket.getListener()) .Readable((NIOClientSocket) theSocket); //System.out.println("Readable Took:" + (System.currentTimeMillis() - timeStart)); if (timeUsageDetailOut != null) { timeUsageDetailOut.timeInReadableEvt += System.currentTimeMillis() - timeStart; } if (bytesRead == -1) { // log it ... // LOG.error("Abnormal Disconnect Detected on Socket:"+ ((NIOClientSocket)theSocket).getSocketAddress()); // trigger a disconnect event ... ((NIOClientSocketListener) theSocket.getListener()) .Disconnected((NIOClientSocket) theSocket, null); // close the socket ... theSocket.close(); } } catch (RuntimeException e) { LOG.error("Caught Runtime Exception in Readable Event:" + StringUtils.stringifyException(e)); ((NIOClientSocketListener) theSocket.getListener()) .Excepted((NIOClientSocket) theSocket, e); theSocket.close(); //KILL THE SERVER // throw e; } // if bytesRead == -1 then this means that the underlying connection has gone bad ... } if (selectionKey.isValid() && selectionKey.isWritable()) { try { timeStart = System.currentTimeMillis(); ((NIOClientSocketListener) theSocket.getListener()) .Writeable((NIOClientSocket) theSocket); // System.out.println("Writable Took:" + (System.currentTimeMillis() - timeStart)); if (timeUsageDetailOut != null) { timeUsageDetailOut.timeInWritableEvt += System.currentTimeMillis() - timeStart; } } catch (RuntimeException e) { LOG.error("Caught Runtime Exception in Readable Event:" + StringUtils.stringifyException(e)); ((NIOClientSocketListener) theSocket.getListener()) .Excepted((NIOClientSocket) theSocket, e); theSocket.close(); //KILL THE SERVER ? //throw e; } } if (selectionKey.isValid() && selectionKey.isAcceptable()) { ((NIOServerSocket) theSocket).acceptable(); // re-register for accept on this socket selectionKey.interestOps(selectionKey.interestOps() | SelectionKey.OP_ACCEPT); } } } // exernally managed socket (thrift client socket) else if (attachment instanceof NIOClientSocketListener) { NIOClientSocketListener listener = (NIOClientSocketListener) attachment; // reset interest ops selectionKey.interestOps(0); // now always set the socket to readable state ... selectionKey.interestOps(selectionKey.interestOps() | SelectionKey.OP_READ); if (selectionKey.isValid() && selectionKey.isReadable()) { int bytesRead = -1; try { timeStart = System.currentTimeMillis(); // track the number of actual bytes read in the callback ... bytesRead = listener.Readable(null); //System.out.println("Readable Took:" + (System.currentTimeMillis() - timeStart)); if (timeUsageDetailOut != null) { timeUsageDetailOut.timeInReadableEvt += System.currentTimeMillis() - timeStart; } if (bytesRead == -1) { // log it ... // LOG.error("Abnormal Disconnect Detected on Socket:"+ ((NIOClientSocket)theSocket).getSocketAddress()); // trigger a disconnect event ... listener.Disconnected(null, null); } } catch (RuntimeException e) { LOG.error("Caught Runtime Exception in Readable Event:" + StringUtils.stringifyException(e)); listener.Excepted(null, e); } // if bytesRead == -1 then this means that the underlying connection has gone bad ... } if (selectionKey.isValid() && selectionKey.isWritable()) { try { timeStart = System.currentTimeMillis(); listener.Writeable(null); // System.out.println("Writable Took:" + (System.currentTimeMillis() - timeStart)); if (timeUsageDetailOut != null) { timeUsageDetailOut.timeInWritableEvt += System.currentTimeMillis() - timeStart; } } catch (RuntimeException e) { LOG.error("Caught Runtime Exception in Readable Event:" + StringUtils.stringifyException(e)); listener.Excepted(null, e); } } } } else { LOG.error("Invalid Socket Detected. Calling Disconnect"); NIOSocket theSocket = (NIOSocket) selectionKey.attachment(); if (theSocket != null && theSocket.getListener() != null) { theSocket.getListener().Disconnected(theSocket, null); } } } //timeoutThriftMethods(); //startPendingThriftMethods(); long unblockedTimeEnd = System.currentTimeMillis(); if (timeUsageDetailOut != null) { timeUsageDetailOut.unblockedTime += (unblockedTimeEnd - unblockedTimeStart); } // } return count; }
From source file:org.limewire.mojito.io.MessageDispatcherImpl.java
/** * Called to indicate an interest in reading something from * the Network. Override this method if you need this functionality! */// w ww.j a v a 2s .co m private void interestRead(boolean on) { interest(SelectionKey.OP_READ, on); }
From source file:com.taobao.gecko.core.nio.impl.Reactor.java
final void dispatchEvent(final Set<SelectionKey> selectedKeySet) { final Iterator<SelectionKey> it = selectedKeySet.iterator(); boolean skipOpRead = false; // while (it.hasNext()) { final SelectionKey key = it.next(); it.remove();//from w ww.j a v a2 s . c o m if (!key.isValid()) { if (key.attachment() != null) { this.controller.closeSelectionKey(key); } else { key.cancel(); } continue; } try { if (key.isAcceptable()) { this.controller.onAccept(key); continue; } if ((key.readyOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE) { // Remove write interest key.interestOps(key.interestOps() & ~SelectionKey.OP_WRITE); this.controller.onWrite(key); if (!this.controller.isHandleReadWriteConcurrently()) { skipOpRead = true; } } if (!skipOpRead && (key.readyOps() & SelectionKey.OP_READ) == SelectionKey.OP_READ) { // read key.interestOps(key.interestOps() & ~SelectionKey.OP_READ); // if (!this.controller.getStatistics().isReceiveOverFlow()) { // Remove read interest this.controller.onRead(key);// continue; } else { key.interestOps(key.interestOps() // | SelectionKey.OP_READ); } } if ((key.readyOps() & SelectionKey.OP_CONNECT) == SelectionKey.OP_CONNECT) { this.controller.onConnect(key); continue; } } catch (final RejectedExecutionException e) { // if (key.attachment() instanceof AbstractNioSession) { ((AbstractSession) key.attachment()).onException(e); } this.controller.notifyException(e); if (this.selector.isOpen()) { continue; } else { break; } } catch (final CancelledKeyException e) { // ignore } catch (final Exception e) { if (key.attachment() instanceof AbstractNioSession) { ((AbstractSession) key.attachment()).onException(e); } this.controller.closeSelectionKey(key); this.controller.notifyException(e); log.error("Reactor dispatch events error", e); if (this.selector.isOpen()) { continue; } else { break; } } } }
From source file:de.kapsi.net.daap.nio.DaapServerNIO.java
/** * Notify all clients about an update of the Library *///from ww w. j ava 2s . com private void processUpdate() { Set keys = selector.keys(); Iterator it = keys.iterator(); while (it.hasNext()) { SelectionKey sk = (SelectionKey) it.next(); SelectableChannel channel = (SelectableChannel) sk.channel(); if (channel instanceof SocketChannel) { DaapConnection connection = (DaapConnection) sk.attachment(); if (connection.isDaapConnection()) { try { connection.update(); if (sk.isValid()) { try { sk.interestOps(SelectionKey.OP_READ | SelectionKey.OP_WRITE); } catch (CancelledKeyException err) { cancel(sk); LOG.error("SelectionKey.interestOps()", err); } } } catch (ClosedChannelException err) { cancel(sk); LOG.error("DaapConnection.update()", err); } catch (IOException err) { cancel(sk); LOG.error("DaapConnection.update()", err); } } } } }
From source file:com.alibaba.napoli.gecko.core.nio.impl.Reactor.java
final void dispatchEvent(final Set<SelectionKey> selectedKeySet) { final Iterator<SelectionKey> it = selectedKeySet.iterator(); boolean skipOpRead = false; // ? while (it.hasNext()) { final SelectionKey key = it.next(); it.remove();// w ww .j av a 2s . c o m if (!key.isValid()) { if (key.attachment() != null) { this.controller.closeSelectionKey(key); } else { key.cancel(); } continue; } try { if (key.isAcceptable()) { this.controller.onAccept(key); continue; } if ((key.readyOps() & SelectionKey.OP_WRITE) == SelectionKey.OP_WRITE) { // Remove write interest key.interestOps(key.interestOps() & ~SelectionKey.OP_WRITE); this.controller.onWrite(key); if (!this.controller.isHandleReadWriteConcurrently()) { skipOpRead = true; } } if (!skipOpRead && (key.readyOps() & SelectionKey.OP_READ) == SelectionKey.OP_READ) { // read key.interestOps(key.interestOps() & ~SelectionKey.OP_READ); // ??? if (!this.controller.getStatistics().isReceiveOverFlow()) { // Remove read interest this.controller.onRead(key);// ? continue; } else { key.interestOps(key.interestOps() // | SelectionKey.OP_READ); } } if ((key.readyOps() & SelectionKey.OP_CONNECT) == SelectionKey.OP_CONNECT) { this.controller.onConnect(key); continue; } } catch (final RejectedExecutionException e) { // ??? if (key.attachment() instanceof AbstractNioSession) { ((AbstractSession) key.attachment()).onException(e); } this.controller.notifyException(e); if (this.selector.isOpen()) { continue; } else { break; } } catch (final CancelledKeyException e) { // ignore } catch (final Exception e) { if (key.attachment() instanceof AbstractNioSession) { ((AbstractSession) key.attachment()).onException(e); } this.controller.closeSelectionKey(key); this.controller.notifyException(e); log.error("Reactor dispatch events error", e); if (this.selector.isOpen()) { continue; } else { break; } } } }
From source file:x10.x10rt.yarn.ApplicationMaster.java
protected void handleX10() { // handle X10 place requests Iterator<SelectionKey> events = null; while (running) { try {/* w w w .j a va 2 s .co m*/ SelectionKey key; // check for previously unhandled events if (events != null && events.hasNext()) { key = events.next(); events.remove(); } else if (selector.select() == 0) // check for new events continue; // nothing to process, go back and block on select again else { // select returned some events events = selector.selectedKeys().iterator(); key = events.next(); events.remove(); } // process the selectionkey if (key.isAcceptable()) { LOG.info("New connection from X10 detected"); // accept any connections on the server socket, and look for things to read from it ServerSocketChannel ssc = (ServerSocketChannel) key.channel(); SocketChannel sc = ssc.accept(); sc.configureBlocking(false); sc.register(selector, SelectionKey.OP_READ); } if (key.isReadable()) { SocketChannel sc = (SocketChannel) key.channel(); ByteBuffer incomingMsg; if (pendingReads.containsKey(sc)) incomingMsg = pendingReads.remove(sc); else incomingMsg = ByteBuffer.allocateDirect(headerLength).order(ByteOrder.nativeOrder()); LOG.info("Reading message from X10"); try { if (sc.read(incomingMsg) == -1) { // socket closed sc.close(); key.cancel(); pendingReads.remove(sc); } else if (incomingMsg.hasRemaining()) { LOG.info("Message header partially read. " + incomingMsg.remaining() + " bytes remaining"); pendingReads.put(sc, incomingMsg); } else { // buffer is full if (incomingMsg.capacity() == headerLength) { // check to see if there is a body associated with this message header int datalen = incomingMsg.getInt(headerLength - 4); //System.err.println("Byte order is "+incomingMsg.order()+" datalen="+datalen); if (datalen == 0) processMessage(incomingMsg, sc); else { // create a larger array to hold the header+body ByteBuffer newBuffer = ByteBuffer.allocateDirect(headerLength + datalen) .order(ByteOrder.nativeOrder()); incomingMsg.rewind(); newBuffer.put(incomingMsg); incomingMsg = newBuffer; sc.read(incomingMsg); // read in the body, if available if (incomingMsg.hasRemaining()) { LOG.info("Message partially read. " + incomingMsg.remaining() + " bytes remaining"); pendingReads.put(sc, incomingMsg); } else processMessage(incomingMsg, sc); } } } } catch (IOException e) { LOG.warn("Error reading in message from socket channel", e); } } } catch (IOException e) { LOG.warn("Error handling X10 links", e); } } }
From source file:Proxy.java
String printSelectionOps(SelectionKey key) {
StringBuilder sb = new StringBuilder();
if ((key.readyOps() & SelectionKey.OP_ACCEPT) != 0)
sb.append("OP_ACCEPT ");
if ((key.readyOps() & SelectionKey.OP_CONNECT) != 0)
sb.append("OP_CONNECT ");
if ((key.readyOps() & SelectionKey.OP_READ) != 0)
sb.append("OP_READ ");
if ((key.readyOps() & SelectionKey.OP_WRITE) != 0)
sb.append("OP_WRITE ");
return sb.toString();
}
From source file:org.gcaldaemon.core.ldap.LDAPListener.java
private static final void processWrite(SelectionKey key) throws Exception { Object att = key.attachment(); if (att == null) { Thread.sleep(100);//from w ww. ja va2 s . c om return; } if (att instanceof ByteBuffer) { ByteBuffer buffer = (ByteBuffer) att; if (!buffer.hasRemaining()) { key.attach(new byte[0]); key.interestOps(SelectionKey.OP_READ); return; } SocketChannel channel = (SocketChannel) key.channel(); channel.write(buffer); } }