Example usage for java.nio.channels SelectionKey cancel

Introduction

In this page you can find the example usage for java.nio.channels SelectionKey cancel.

Prototype

public abstract void cancel();

Source Link

Document

Requests that the registration of this key's channel with its selector be cancelled.

Usage

From source file:HttpDownloadManager.java

void handleError(DownloadImpl download, SocketChannel channel, SelectionKey key, Throwable throwable) {
    download.status = Status.ERROR;/*from www .j a va  2  s.co m*/
    try {
        if (channel != null)
            channel.close();
    } catch (IOException e) {
    }
    if (key != null)
        key.cancel();
    log.log(Level.WARNING, "Error connecting to or downloading from " + download.host + ":" + download.port,
            throwable);
    if (download.listener != null)
        download.listener.error(download, throwable);
}

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From source file:de.kapsi.net.daap.nio.DaapServerNIO.java

/**
 * Cancel SelesctionKey, close Channel and "free" the attachment
 *///from w  ww.ja v a  2s .  c  om
private void cancel(SelectionKey sk) {

    sk.cancel();

    SelectableChannel channel = (SelectableChannel) sk.channel();

    try {
        channel.close();
    } catch (IOException err) {
        LOG.error("Channel.close()", err);
    }

    DaapConnection connection = (DaapConnection) sk.attachment();

    if (connection != null) {

        DaapSession session = connection.getSession(false);
        if (session != null) {
            sessionIds.remove(session.getSessionId());
        }

        connection.close();

        if (connection.isDaapConnection()) {
            connections.remove(connection);
        } else if (connection.isAudioStream()) {
            streams.remove(connection);
        }
    }
}

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From source file:com.alibaba.napoli.gecko.core.nio.impl.Reactor.java

final void unregisterChannel(final SelectableChannel channel) {
    try {/*w ww.  jav  a 2  s .c om*/
        final Selector selector = this.selector;
        if (selector != null) {
            if (channel != null) {
                final SelectionKey key = channel.keyFor(selector);
                if (key != null) {
                    key.cancel();
                    this.cancelledKeys++;
                }
            }
        }
        if (channel != null && channel.isOpen()) {
            channel.close();
        }
    } catch (final Throwable t) {
        // ignore
    }
    this.wakeup();
}

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From source file:oz.hadoop.yarn.api.net.ApplicationContainerServerImpl.java

/**
 * Unlike the client side the read on the server will happen using receiving thread.
 *//*from   ww w  . j a  va  2  s.  c  om*/
@Override
void read(SelectionKey selectionKey, ByteBuffer replyBuffer) throws IOException {
    ReplyPostProcessor replyCallbackHandler = ((ReplyPostProcessor) this.replyCallbackMap.remove(selectionKey));
    if (logger.isDebugEnabled()) {
        logger.debug("Reply received from " + ((SocketChannel) selectionKey.channel()).getRemoteAddress());
    }
    if (this.replyListener != null) {
        this.replyListener.onReply(replyBuffer);
    }
    replyCallbackHandler.postProcess(replyBuffer);

    if (this.finite) {
        selectionKey.cancel();
        this.closeChannel(selectionKey.channel());
        this.onDisconnect(selectionKey);
    }
}

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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 w w .  ja  v a 2  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;
            }
        }
    }
}

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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();//  w  w w .j  a va 2  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;
            }
        }
    }
}

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From source file:ca.wumbo.doommanager.server.ServerManager.java

/**
 * Kills any connections that have not sent any messages for a period of
 * time./*from   w  ww .  j  av a 2  s . c o  m*/
 * 
 * @return
 *       True if there was no error, false if an error occured.
 */
private boolean killInactiveConnections() {
    // Go through each connection every so often to check for dead connections.
    if (System.currentTimeMillis() - lastTimeoutCheckMillis > TIMEOUT_FREQUENCY_CHECK_MILLIS) {
        lastTimeoutCheckMillis = System.currentTimeMillis();
        log.trace("Checking for timeouts... {}", System.currentTimeMillis());

        // We cannot do this if the selector is closed.
        if (selector.isOpen()) {
            // Go through each connection...
            for (SelectionKey key : selector.keys()) {
                // If the attachment has client info (which it always should)...
                if (key.attachment() instanceof ClientInfo) {
                    ClientInfo clientInfo = (ClientInfo) key.attachment();
                    // If the client hasn't responded for a certain amount of time, kill the connection.
                    if (clientInfo.hasReceivedMessageSince(TIMEOUT_CLIENT_MILLIS)) {
                        log.info("Client {} timed out, requesting connection termination.",
                                clientInfo.getIPAddress());
                        Channel channel = key.channel();
                        key.cancel();
                        try {
                            channel.close();
                        } catch (IOException e) {
                            log.error("Error closing a timed out client's channel: {}", e.getMessage());
                        }
                    }
                }
            }
        }
    }

    // Signal all is good.
    return true;
}

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From source file:net.socket.nio.TimeClientHandle.java

private void handleInput(SelectionKey key) throws IOException {

    if (key.isValid()) {
        // ??//  ww w.  jav a  2s.  c om
        SocketChannel sc = (SocketChannel) key.channel();
        if (key.isConnectable()) {
            if (sc.finishConnect()) {
                sc.register(selector, SelectionKey.OP_READ);
                doWrite(sc);
            } else {
                System.exit(1);// 
            }
        }
        if (key.isReadable()) {
            ByteBuffer readBuffer = ByteBuffer.allocate(1024);
            int readBytes = sc.read(readBuffer);
            if (readBytes > 0) {
                readBuffer.flip();
                byte[] bytes = new byte[readBuffer.remaining()];
                readBuffer.get(bytes);
                String body = new String(bytes, "UTF-8");
                System.out.println("Now is : " + body);
                this.stop = true;
            } else if (readBytes < 0) {
                // 
                key.cancel();
                sc.close();
            } else {
                ; // 0
            }
        }
    }

}

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From source file:me.xingrz.prox.tcp.tunnel.Tunnel.java

/**
 *  Selector  OP_READ //from w w w . j a  v a2 s .c  o m
 *
 * @param key Selection Key
 */
@Override
public final void onReadable(SelectionKey key) {
    if (closed || receiving == null) {
        return;
    }

    receiving.clear();

    int read;

    try {
        read = channel.read(receiving);
    } catch (IOException e) {
        logger.w(e, "Failed to read from channel, terminated");
        IOUtils.closeQuietly(this);
        return;
    }

    if (read == -1) {
        IOUtils.closeQuietly(this);
        return;
    }

    receiving.flip();

    // 
    if (!receiving.hasRemaining()) {
        return;
    }

    // ???
    if (afterReceived(receiving)) {
        return;
    }

    // ??
    if (!receiving.hasRemaining()) {
        return;
    }

    brother.beforeSending(receiving);

    if (!brother.write(receiving)) {
        logger.v("Brother not ready for receiving, canceled");
        key.cancel();
    }
}

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From source file:com.byteatebit.nbserver.simple.SelectorTask.java

protected void executeIoTasksOnSelectedKeys() {
    Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
    while (iterator.hasNext()) {
        SelectionKey selectionKey = iterator.next();
        iterator.remove();//  w  ww .j a  va 2s .  c  o m
        try {
            NioSelectionKeyEntry nioTaskEntry = (NioSelectionKeyEntry) selectionKey.attachment();
            if (nioTaskEntry == null) {
                LOG.error("The nio task is unexpectedly null for selectionKey " + selectionKey);
                return;
            }
            nioTaskEntry.executeTasks(selectionKey);
        } catch (Exception e) {
            LOG.error("Failed to execute the consumer attached to selectionKey " + selectionKey
                    + ".  Cancelling the key and closing the underlying channel", e);
            try {
                selectionKey.channel().close();
            } catch (IOException e1) {
                LOG.error("selection key channel error on close", e);
            }
            selectionKey.cancel();
        }
    }
}

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