Java Code Examples for java.nio.channels.SelectableChannel#close()

The following examples show how to use java.nio.channels.SelectableChannel#close() . 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: AbstractNioChannel.java From netty4.0.27Learn with Apache License 2.0

6 votes

/**
 * Create a new instance
 *
 * @param parent            the parent {@link Channel} by which this instance was created. May be {@code null}
 * @param ch                the underlying {@link SelectableChannel} on which it operates
 * @param readInterestOp    the ops to set to receive data from the {@link SelectableChannel}
 */
protected AbstractNioChannel(Channel parent, SelectableChannel ch, int readInterestOp) {
    super(parent);
    this.ch = ch;
    this.readInterestOp = readInterestOp;
    try {
        ch.configureBlocking(false);
    } catch (IOException e) {
        try {
            ch.close();
        } catch (IOException e2) {
            if (logger.isWarnEnabled()) {
                logger.warn(
                        "Failed to close a partially initialized socket.", e2);
            }
        }

        throw new ChannelException("Failed to enter non-blocking mode.", e);
    }
}

Example 2

Source File: HeronClient.java From incubator-heron with Apache License 2.0

6 votes

public void handleError(SelectableChannel channel) {
  LOG.info("Handling Error. Cleaning states in HeronClient.");
  contextMap.clear();
  responseMessageMap.clear();
  messageMap.clear();
  socketChannelHelper.clear();
  nioLooper.removeAllInterest(channel);

  try {
    channel.close();
    LOG.info("Successfully closed the channel: " + channel);
  } catch (IOException e) {
    LOG.log(Level.SEVERE, "Failed to close connection in handleError", e);
  }

  // Since we closed the channel, we set isConnected false
  isConnected = false;
  onError();
}

Example 3

Source File: HeronServer.java From incubator-heron with Apache License 2.0

6 votes

public void handleError(SelectableChannel channel) {
  SocketAddress channelAddress = ((SocketChannel) channel).socket().getRemoteSocketAddress();
  LOG.info("Handling error from channel: " + channelAddress);
  SocketChannelHelper helper = activeConnections.get(channel);
  if (helper == null) {
    LOG.severe("Inactive channel had error?");
    return;
  }
  helper.clear();
  LOG.info("Removing all interest on channel: " + channelAddress);
  nioLooper.removeAllInterest(channel);
  try {
    channel.close();
  } catch (IOException e) {
    LOG.severe("Error closing connection in handleError");
  }
  activeConnections.remove(channel);
  onClose((SocketChannel) channel);
}

Example 4

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

6 votes

/**
     * Create a new instance
     *
     * @param parent            the parent {@link Channel} by which this instance was created. May be {@code null}
     * @param ch                the underlying {@link SelectableChannel} on which it operates
     * @param readInterestOp    the ops to set to receive data from the {@link SelectableChannel}
     */
    protected AbstractNioChannel(Channel parent, SelectableChannel ch, int readInterestOp) {
        super(parent);
        this.ch = ch;
        this.readInterestOp = readInterestOp;
        try {
//            设置非阻塞
            ch.configureBlocking(false);
        } catch (IOException e) {
            try {
                ch.close();
            } catch (IOException e2) {
                if (logger.isWarnEnabled()) {
                    logger.warn(
                            "Failed to close a partially initialized socket.", e2);
                }
            }

            throw new ChannelException("Failed to enter non-blocking mode.", e);
        }
    }

Example 5

Source File: NetworkManager.java From attic-apex-malhar with Apache License 2.0

6 votes

public synchronized void unregisterAction(ChannelAction action) throws IOException, InterruptedException
{
  ChannelConfiguration channelConfiguration = action.channelConfiguration;
  SelectableChannel channel = channelConfiguration.channel;
  if (channelConfiguration != null) {
    channelConfiguration.actions.remove(action);
    if (channelConfiguration.actions.size() == 0) {
      ConnectionInfo connectionInfo = channelConfiguration.connectionInfo;
      channelConfigurations.remove(channel);
      channels.remove(connectionInfo);
      channel.close();
    }
  }
  if (channels.size() == 0) {
    stopProcess();
  }
}

Example 6

Source File: SelectorTest.java From cava with Apache License 2.0

6 votes

@Test
void selectorRemovesKeysOnChannelCloseWhenSelecting() throws Exception {
  Pipe pipe = Pipe.open();

  Selector selector = Selector.open();
  SelectableChannel source = pipe.source();
  source.configureBlocking(false);

  SelectionKey key = source.register(selector, OP_READ);
  assertTrue(selector.keys().contains(key));

  source.close();
  assertTrue(selector.keys().contains(key));

  selector.selectNow();
  assertFalse(selector.keys().contains(key));
}

Example 7

Source File: WebSocketServer.java From Slyther with MIT License

6 votes

private void handleIOException( SelectionKey key, WebSocket conn, IOException ex ) {
	// onWebsocketError( conn, ex );// conn may be null here
	if( conn != null ) {
		conn.closeConnection( CloseFrame.ABNORMAL_CLOSE, ex.getMessage() );
	} else if( key != null ) {
		SelectableChannel channel = key.channel();
		if( channel != null && channel.isOpen() ) { // this could be the case if the IOException ex is a SSLException
			try {
				channel.close();
			} catch ( IOException e ) {
				// there is nothing that must be done here
			}
			if( WebSocketImpl.DEBUG )
				System.out.println( "Connection closed because of" + ex );
		}
	}
}

Example 8

Source File: WebSocketServer.java From RipplePower with Apache License 2.0

6 votes

private void handleIOException( SelectionKey key, WebSocket conn, IOException ex ) {
	// onWebsocketError( conn, ex );// conn may be null here
	if( conn != null ) {
		conn.closeConnection( CloseFrame.ABNORMAL_CLOSE, ex.getMessage() );
	} else if( key != null ) {
		SelectableChannel channel = key.channel();
		if( channel != null && channel.isOpen() ) { // this could be the case if the IOException ex is a SSLException
			try {
				channel.close();
			} catch ( IOException e ) {
				// there is nothing that must be done here
			}
			if( WebSocketImpl.DEBUG )
				System.out.println("Connection closed because of " + ex);
		}
	}
}

Example 9

Source File: BaseWebSocketServer.java From ans-android-sdk with GNU General Public License v3.0

6 votes

private void handleIOException(SelectionKey key, WebSocket conn, IOException ex) {
    // onWebsocketError( conn, ex );// conn may be null here
    if (conn != null) {
        conn.closeConnection(CloseFrame.ABNORMAL_CLOSE, ex.getMessage());
    } else if (key != null) {
        SelectableChannel channel = key.channel();
        if (channel != null && channel.isOpen()) { // this could be the case if the
            // IOException ex is a SSLException
            try {
                channel.close();
            } catch (IOException e) {
                // there is nothing that must be done here
            }
            if (WebSocketImpl.DEBUG) {
                System.out.println("Connection closed because of " + ex);
            }
        }
    }
}

Example 10

Source File: Server.java From twister2 with Apache License 2.0

6 votes

@Override
public void handleError(SelectableChannel ch) {
  SocketAddress channelAddress = ((SocketChannel) ch).socket().getRemoteSocketAddress();
  LOG.log(Level.FINE, "Connection is closed: " + channelAddress);

  BaseNetworkChannel channel = connectedChannels.get(ch);
  if (channel == null) {
    LOG.warning("Error occurred in non-existing channel");
    return;
  }
  channel.clear();
  progress.removeAllInterest(ch);
  try {
    ch.close();
  } catch (IOException e) {
    LOG.warning("Error closing conection in error handler");
  }
  connectedChannels.remove(ch);
  channelHandler.onClose((SocketChannel) ch);
}

Example 11

Source File: Client.java From twister2 with Apache License 2.0

6 votes

@Override
public void handleError(SelectableChannel ch) {
  channel.clear();
  progress.removeAllInterest(ch);

  LOG.log(Level.SEVERE, "Error on channel " + ch);

  try {
    ch.close();
  } catch (IOException e) {
    LOG.log(Level.SEVERE, "Failed to close connection in handleError", e);
  }

  isConnected = false;
  connecting = false;
  tryToConnect = false;
  channelHandler.onError(socketChannel, StatusCode.ERROR_CONN);
}

Example 12

Source File: SelectorImpl.java From openjdk-jdk8u with GNU General Public License v2.0

5 votes

private void clearDeferredRegistrations() {
    synchronized (deferredRegistrations) {
        int deferredListSize = deferredRegistrations.size();
        if (orb.transportDebugFlag) {
            dprint(".clearDeferredRegistrations:deferred list size == " + deferredListSize);
        }
        for (int i = 0; i < deferredListSize; i++) {
            EventHandler eventHandler =
                (EventHandler)deferredRegistrations.get(i);
            if (orb.transportDebugFlag) {
                dprint(".clearDeferredRegistrations: " + eventHandler);
            }
            SelectableChannel channel = eventHandler.getChannel();
            SelectionKey selectionKey = null;

            try {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations:close channel == "
                            + channel);
                    dprint(".clearDeferredRegistrations:close channel class == "
                            + channel.getClass().getName());
                }
                channel.close();
                selectionKey = eventHandler.getSelectionKey();
                if (selectionKey != null) {
                    selectionKey.cancel();
                    selectionKey.attach(null);
                }
            } catch (IOException ioEx) {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations: ", ioEx);
                }
            }
        }
        deferredRegistrations.clear();
    }
}

Example 13

Source File: SelectorImpl.java From hottub with GNU General Public License v2.0

5 votes

private void clearDeferredRegistrations() {
    synchronized (deferredRegistrations) {
        int deferredListSize = deferredRegistrations.size();
        if (orb.transportDebugFlag) {
            dprint(".clearDeferredRegistrations:deferred list size == " + deferredListSize);
        }
        for (int i = 0; i < deferredListSize; i++) {
            EventHandler eventHandler =
                (EventHandler)deferredRegistrations.get(i);
            if (orb.transportDebugFlag) {
                dprint(".clearDeferredRegistrations: " + eventHandler);
            }
            SelectableChannel channel = eventHandler.getChannel();
            SelectionKey selectionKey = null;

            try {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations:close channel == "
                            + channel);
                    dprint(".clearDeferredRegistrations:close channel class == "
                            + channel.getClass().getName());
                }
                channel.close();
                selectionKey = eventHandler.getSelectionKey();
                if (selectionKey != null) {
                    selectionKey.cancel();
                    selectionKey.attach(null);
                }
            } catch (IOException ioEx) {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations: ", ioEx);
                }
            }
        }
        deferredRegistrations.clear();
    }
}

Example 14

Source File: SelectorImpl.java From openjdk-jdk9 with GNU General Public License v2.0

5 votes

private void clearDeferredRegistrations() {
    synchronized (deferredRegistrations) {
        int deferredListSize = deferredRegistrations.size();
        if (orb.transportDebugFlag) {
            dprint(".clearDeferredRegistrations:deferred list size == " + deferredListSize);
        }
        for (int i = 0; i < deferredListSize; i++) {
            EventHandler eventHandler =
                (EventHandler)deferredRegistrations.get(i);
            if (orb.transportDebugFlag) {
                dprint(".clearDeferredRegistrations: " + eventHandler);
            }
            SelectableChannel channel = eventHandler.getChannel();
            SelectionKey selectionKey = null;

            try {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations:close channel == "
                            + channel);
                    dprint(".clearDeferredRegistrations:close channel class == "
                            + channel.getClass().getName());
                }
                channel.close();
                selectionKey = eventHandler.getSelectionKey();
                if (selectionKey != null) {
                    selectionKey.cancel();
                    selectionKey.attach(null);
                }
            } catch (IOException ioEx) {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations: ", ioEx);
                }
            }
        }
        deferredRegistrations.clear();
    }
}

Example 15

Source File: SelectorImpl.java From openjdk-jdk8u-backup with GNU General Public License v2.0

5 votes

private void clearDeferredRegistrations() {
    synchronized (deferredRegistrations) {
        int deferredListSize = deferredRegistrations.size();
        if (orb.transportDebugFlag) {
            dprint(".clearDeferredRegistrations:deferred list size == " + deferredListSize);
        }
        for (int i = 0; i < deferredListSize; i++) {
            EventHandler eventHandler =
                (EventHandler)deferredRegistrations.get(i);
            if (orb.transportDebugFlag) {
                dprint(".clearDeferredRegistrations: " + eventHandler);
            }
            SelectableChannel channel = eventHandler.getChannel();
            SelectionKey selectionKey = null;

            try {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations:close channel == "
                            + channel);
                    dprint(".clearDeferredRegistrations:close channel class == "
                            + channel.getClass().getName());
                }
                channel.close();
                selectionKey = eventHandler.getSelectionKey();
                if (selectionKey != null) {
                    selectionKey.cancel();
                    selectionKey.attach(null);
                }
            } catch (IOException ioEx) {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations: ", ioEx);
                }
            }
        }
        deferredRegistrations.clear();
    }
}

Example 16

Source File: TcpConnectorService.java From linstor-server with GNU General Public License v3.0

5 votes

private void closeConnection(SelectionKey currentKey, boolean allowReconnect, boolean shuttingDown)
{
    Peer client = (TcpConnectorPeer) currentKey.attachment();
    if (client != null)
    {
        connObserver.connectionClosed(client, allowReconnect, shuttingDown);
        try
        {
            if (client.isConnected(false))
            {
                client.connectionClosing();
            }
        }
        catch (CancelledKeyException ignored)
        {
            // connectionClosing() calls interestOps on the selection Key, which may fail
        }
    }

    try
    {
        SelectableChannel channel = currentKey.channel();
        if (channel != null)
        {
            channel.close();
        }
    }
    catch (IOException closeIoExc)
    {
        // If close() fails with an I/O error, the reason may be interesting
        // enough to file an error report
        errorReporter.reportError(closeIoExc);
    }
    currentKey.cancel();
}

Example 17

Source File: SelectorTest.java From cava with Apache License 2.0

5 votes

@Test
void selectorRemovesKeysOnChannelCloseWhileSelecting() throws Exception {
  Pipe pipe = Pipe.open();

  Selector selector = Selector.open();
  SelectableChannel source = pipe.source();
  source.configureBlocking(false);

  SelectionKey key = source.register(selector, OP_READ);
  assertTrue(selector.keys().contains(key));

  CountDownLatch latch = new CountDownLatch(1);
  Future<?> job = executor.submit(() -> {
    latch.countDown();
    try {
      selector.select();
    } catch (IOException e) {
      throw new UncheckedIOException(e);
    }
  });

  latch.await();
  Thread.sleep(100);

  source.close();
  selector.wakeup();
  job.get();
  assertFalse(selector.keys().contains(key));
}

Example 18

Source File: SelectorImpl.java From jdk1.8-source-analysis with Apache License 2.0

5 votes

private void clearDeferredRegistrations() {
    synchronized (deferredRegistrations) {
        int deferredListSize = deferredRegistrations.size();
        if (orb.transportDebugFlag) {
            dprint(".clearDeferredRegistrations:deferred list size == " + deferredListSize);
        }
        for (int i = 0; i < deferredListSize; i++) {
            EventHandler eventHandler =
                (EventHandler)deferredRegistrations.get(i);
            if (orb.transportDebugFlag) {
                dprint(".clearDeferredRegistrations: " + eventHandler);
            }
            SelectableChannel channel = eventHandler.getChannel();
            SelectionKey selectionKey = null;

            try {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations:close channel == "
                            + channel);
                    dprint(".clearDeferredRegistrations:close channel class == "
                            + channel.getClass().getName());
                }
                channel.close();
                selectionKey = eventHandler.getSelectionKey();
                if (selectionKey != null) {
                    selectionKey.cancel();
                    selectionKey.attach(null);
                }
            } catch (IOException ioEx) {
                if (orb.transportDebugFlag) {
                    dprint(".clearDeferredRegistrations: ", ioEx);
                }
            }
        }
        deferredRegistrations.clear();
    }
}

Example 19

Source File: SelectorTest.java From incubator-tuweni with Apache License 2.0

5 votes

@Test
void selectorRemovesKeysOnChannelCloseWhileSelecting() throws Exception {
  Pipe pipe = Pipe.open();

  Selector selector = Selector.open();
  SelectableChannel source = pipe.source();
  source.configureBlocking(false);

  SelectionKey key = source.register(selector, OP_READ);
  assertTrue(selector.keys().contains(key));

  CountDownLatch latch = new CountDownLatch(1);
  Future<?> job = executor.submit(() -> {
    latch.countDown();
    try {
      selector.select();
    } catch (IOException e) {
      throw new UncheckedIOException(e);
    }
  });

  latch.await();
  Thread.sleep(100);

  source.close();
  selector.wakeup();
  job.get();
  assertFalse(selector.keys().contains(key));
}

Example 20

Source File: NioAcceptor.java From craft-atom with MIT License

5 votes

private void close(SelectableChannel sc) throws IOException {
	if (sc != null) {
		SelectionKey key = sc.keyFor(selector);
		if (key != null) {
			key.cancel();
		}
		sc.close();
	}
}