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

Example 16 with SelectableChannel

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

the class ManagedSelector method processAccept.

private void processAccept(SelectionKey key) {
    SelectableChannel server = key.channel();
    SelectableChannel channel = null;
    try {
        channel = _selectorManager.doAccept(server);
        if (channel != null)
            _selectorManager.accepted(channel);
    } catch (Throwable x) {
        closeNoExceptions(channel);
        LOG.warn("Accept failed for channel " + channel, x);
    }
}

Example 17 with SelectableChannel

use of java.nio.channels.SelectableChannel in project hs4j by killme2008.

the class Reactor method lookJVMBug.

/**
	 * Look jvm bug
	 * 
	 * @param before
	 * @param selected
	 * @param wait
	 * @return
	 * @throws IOException
	 */
private boolean lookJVMBug(long before, int selected, long wait) throws IOException {
    boolean seeing = false;
    long now = System.currentTimeMillis();
    if (JVMBUG_THRESHHOLD > 0 && selected == 0 && wait > JVMBUG_THRESHHOLD && now - before < wait / 4 && !wakenUp.get() && /* waken up */
    !Thread.currentThread().isInterrupted()) /* Interrupted */
    {
        jvmBug.incrementAndGet();
        if (jvmBug.get() >= JVMBUG_THRESHHOLD2) {
            gate.lock();
            try {
                lastJVMBug = now;
                log.warn("JVM bug occured at " + new Date(lastJVMBug) + ",http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6403933,reactIndex=" + reactorIndex);
                if (jvmBug1) {
                    log.debug("seeing JVM BUG(s) - recreating selector,reactIndex=" + reactorIndex);
                } else {
                    jvmBug1 = true;
                    log.info("seeing JVM BUG(s) - recreating selector,reactIndex=" + reactorIndex);
                }
                seeing = true;
                final Selector new_selector = SystemUtils.openSelector();
                for (SelectionKey k : selector.keys()) {
                    if (!k.isValid() || k.interestOps() == 0) {
                        continue;
                    }
                    final SelectableChannel channel = k.channel();
                    final Object attachment = k.attachment();
                    channel.register(new_selector, k.interestOps(), attachment);
                }
                selector.close();
                selector = new_selector;
            } finally {
                gate.unlock();
            }
            jvmBug.set(0);
        } else if (jvmBug.get() == JVMBUG_THRESHHOLD || jvmBug.get() == JVMBUG_THRESHHOLD1) {
            if (jvmBug0) {
                log.debug("seeing JVM BUG(s) - cancelling interestOps==0,reactIndex=" + reactorIndex);
            } else {
                jvmBug0 = true;
                log.info("seeing JVM BUG(s) - cancelling interestOps==0,reactIndex=" + reactorIndex);
            }
            gate.lock();
            seeing = true;
            try {
                for (SelectionKey k : selector.keys()) {
                    if (k.isValid() && k.interestOps() == 0) {
                        k.cancel();
                    }
                }
            } finally {
                gate.unlock();
            }
        }
    } else {
        jvmBug.set(0);
    }
    return seeing;
}

Example 18 with SelectableChannel

use of java.nio.channels.SelectableChannel in project netty by netty.

the class NioEventLoop method processSelectedKeysPlain.

private void processSelectedKeysPlain(Set<SelectionKey> selectedKeys) {
    // See https://github.com/netty/netty/issues/597
    if (selectedKeys.isEmpty()) {
        return;
    }
    Iterator<SelectionKey> i = selectedKeys.iterator();
    for (; ; ) {
        final SelectionKey k = i.next();
        final Object a = k.attachment();
        i.remove();
        if (a instanceof AbstractNioChannel) {
            processSelectedKey(k, (AbstractNioChannel) a);
        } else {
            @SuppressWarnings("unchecked") NioTask<SelectableChannel> task = (NioTask<SelectableChannel>) a;
            processSelectedKey(k, task);
        }
        if (!i.hasNext()) {
            break;
        }
        if (needsToSelectAgain) {
            selectAgain();
            selectedKeys = selector.selectedKeys();
            // Create the iterator again to avoid ConcurrentModificationException
            if (selectedKeys.isEmpty()) {
                break;
            } else {
                i = selectedKeys.iterator();
            }
        }
    }
}

Example 19 with SelectableChannel

use of java.nio.channels.SelectableChannel in project netty by netty.

the class NioEventLoop method rebuildSelector0.

private void rebuildSelector0() {
    final Selector oldSelector = selector;
    final Selector newSelector;
    if (oldSelector == null) {
        return;
    }
    try {
        newSelector = openSelector();
    } catch (Exception e) {
        logger.warn("Failed to create a new Selector.", e);
        return;
    }
    // Register all channels to the new Selector.
    int nChannels = 0;
    for (SelectionKey key : oldSelector.keys()) {
        Object a = key.attachment();
        try {
            if (!key.isValid() || key.channel().keyFor(newSelector) != null) {
                continue;
            }
            int interestOps = key.interestOps();
            key.cancel();
            SelectionKey newKey = key.channel().register(newSelector, interestOps, a);
            if (a instanceof AbstractNioChannel) {
                // Update SelectionKey
                ((AbstractNioChannel) a).selectionKey = newKey;
            }
            nChannels++;
        } catch (Exception e) {
            logger.warn("Failed to re-register a Channel to the new Selector.", e);
            if (a instanceof AbstractNioChannel) {
                AbstractNioChannel ch = (AbstractNioChannel) a;
                ch.unsafe().close(ch.unsafe().voidPromise());
            } else {
                @SuppressWarnings("unchecked") NioTask<SelectableChannel> task = (NioTask<SelectableChannel>) a;
                invokeChannelUnregistered(task, key, e);
            }
        }
    }
    selector = newSelector;
    try {
        // time to close the old selector as everything else is registered to the new one
        oldSelector.close();
    } catch (Throwable t) {
        if (logger.isWarnEnabled()) {
            logger.warn("Failed to close the old Selector.", t);
        }
    }
    logger.info("Migrated " + nChannels + " channel(s) to the new Selector.");
}

Example 20 with SelectableChannel

use of java.nio.channels.SelectableChannel in project netty by netty.

the class NioEventLoop method closeAll.

private void closeAll() {
    selectAgain();
    Set<SelectionKey> keys = selector.keys();
    Collection<AbstractNioChannel> channels = new ArrayList<AbstractNioChannel>(keys.size());
    for (SelectionKey k : keys) {
        Object a = k.attachment();
        if (a instanceof AbstractNioChannel) {
            channels.add((AbstractNioChannel) a);
        } else {
            k.cancel();
            @SuppressWarnings("unchecked") NioTask<SelectableChannel> task = (NioTask<SelectableChannel>) a;
            invokeChannelUnregistered(task, k, null);
        }
    }
    for (AbstractNioChannel ch : channels) {
        ch.unsafe().close(ch.unsafe().voidPromise());
    }
}