Example usage for java.nio.channels SelectableChannel keyFor

Introduction

In this page you can find the example usage for java.nio.channels SelectableChannel keyFor.

Prototype

public abstract SelectionKey keyFor(Selector sel);

Source Link

Document

Retrieves the key representing the channel's registration with the given selector.

Usage

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

final void unregisterChannel(final SelectableChannel channel) {
    try {//from   w w w . j  ava  2s  .  c  o  m
        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:com.byteatebit.nbserver.simple.SelectorTask.java

@Override
public SelectionKey register(SelectableChannel channel, int ops, IOTask nioTask, IOTimeoutTask timeoutTask,
        long timeoutMs) {
    Preconditions.checkNotNull(channel, "channel cannot be null");
    Preconditions.checkNotNull(nioTask, "nioTask cannot be null");
    IOTimeoutTask ioTimeoutTask = timeoutTask == null ? defaultIoTimeoutTask : timeoutTask;
    if (LOG.isDebugEnabled())
        LOG.debug("registering channel " + channel + "for ops " + ops + " and task " + nioTask);
    SelectionKey key = null;//from   ww  w .j a v  a2  s .com
    NioSelectionKeyEntry selectionKeyEntry = null;
    synchronized (this) {
        try {
            key = channel.keyFor(selector);
            if (key != null) {
                key.interestOps(key.interestOps() | ops);
                selectionKeyEntry = (NioSelectionKeyEntry) key.attachment();
            } else {
                selectionKeyEntry = new NioSelectionKeyEntry();
                key = channel.register(selector, ops, selectionKeyEntry);
            }
        } catch (ClosedChannelException e) {
            throw new SelectorException(e);
        }
        selectionKeyEntry.setTask(nioTask, ioTimeoutTask, ops, timeoutMs);
    }
    if (LOG.isDebugEnabled())
        LOG.debug("Total number of selection keys: " + selector.keys().size());
    return key;
}

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