Examples with Selector java.nio.channels.Selector used on opensource projects

Example 1 with Selector

use of java.nio.channels.Selector in project jetty.project by eclipse.

the class ManagedSelector method dump.

@Override
public void dump(Appendable out, String indent) throws IOException {
    out.append(String.valueOf(this)).append(" id=").append(String.valueOf(_id)).append(System.lineSeparator());
    Selector selector = _selector;
    if (selector != null && selector.isOpen()) {
        final ArrayList<Object> dump = new ArrayList<>(selector.keys().size() * 2);
        DumpKeys dumpKeys = new DumpKeys(dump);
        submit(dumpKeys);
        dumpKeys.await(5, TimeUnit.SECONDS);
        ContainerLifeCycle.dump(out, indent, dump);
    }
}

Example 2 with Selector

use of java.nio.channels.Selector in project jetty.project by eclipse.

the class ManagedSelector method submit.

public void submit(Runnable change) {
    if (LOG.isDebugEnabled())
        LOG.debug("Queued change {} on {}", change, this);
    Selector selector = null;
    try (Locker.Lock lock = _locker.lock()) {
        _actions.offer(change);
        if (_selecting) {
            selector = _selector;
            // To avoid the extra select wakeup.
            _selecting = false;
        }
    }
    if (selector != null)
        selector.wakeup();
}

Example 3 with Selector

use of java.nio.channels.Selector in project tomcat by apache.

the class NioSelectorPool method close.

public void close() throws IOException {
    enabled = false;
    Selector s;
    while ((s = selectors.poll()) != null) s.close();
    spare.set(0);
    active.set(0);
    if (blockingSelector != null) {
        blockingSelector.close();
    }
    if (SHARED && getSharedSelector() != null) {
        getSharedSelector().close();
        SHARED_SELECTOR = null;
    }
}

Example 4 with Selector

use of java.nio.channels.Selector in project cryptomator by cryptomator.

the class SingleInstanceManager method tryFill.

/**
	 * tries to fill the given buffer for the given time
	 * 
	 * @param channel
	 * @param buf
	 * @param timeout
	 * @throws ClosedChannelException
	 * @throws IOException
	 */
public static <T extends SelectableChannel & ReadableByteChannel> void tryFill(T channel, final ByteBuffer buf, int timeout) throws IOException {
    if (channel.isBlocking()) {
        throw new IllegalStateException("Channel is in blocking mode.");
    }
    try (Selector selector = Selector.open()) {
        channel.register(selector, SelectionKey.OP_READ);
        TimeoutTask.attempt(remainingTime -> {
            if (!buf.hasRemaining()) {
                return true;
            }
            if (selector.select(remainingTime) > 0) {
                if (channel.read(buf) < 0) {
                    return true;
                }
            }
            return !buf.hasRemaining();
        }, timeout, 1);
    }
}

Example 5 with Selector

use of java.nio.channels.Selector in project cryptomator by cryptomator.

the class SingleInstanceManager method startLocalInstance.

/**
	 * Creates a server socket on a free port and saves the port in
	 * {@link Preferences#userNodeForPackage(Class)} for {@link Cryptomator} under the
	 * given applicationKey.
	 * 
	 * @param applicationKey
	 *            key used to save the port and identify upon connection.
	 * @param exec
	 *            the task which is submitted is interruptable.
	 * @return
	 * @throws IOException
	 */
public static LocalInstance startLocalInstance(String applicationKey, ExecutorService exec) throws IOException {
    final ServerSocketChannel channel = ServerSocketChannel.open();
    boolean success = false;
    try {
        channel.configureBlocking(false);
        channel.bind(new InetSocketAddress(InetAddress.getLoopbackAddress(), 0));
        final int port = ((InetSocketAddress) channel.getLocalAddress()).getPort();
        Preferences.userNodeForPackage(Cryptomator.class).putInt(applicationKey, port);
        LOG.debug("InstanceManager bound to port {}", port);
        Selector selector = Selector.open();
        channel.register(selector, SelectionKey.OP_ACCEPT);
        LocalInstance instance = new LocalInstance(applicationKey, channel, selector, port);
        exec.submit(instance::selectionLoop);
        success = true;
        return instance;
    } finally {
        if (!success) {
            channel.close();
        }
    }
}