Example usage for java.nio.channels SelectionKey selector

Introduction

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

Prototype

public abstract Selector selector();

Source Link

Document

Returns the selector for which this key was created.

Usage

From source file:net.ymate.platform.serv.nio.support.NioEventGroup.java

public NioEventProcessor processor(SelectionKey key) {
    for (NioEventProcessor _processor : __processors) {
        if (key.selector() == _processor.__selector) {
            return _processor;
        }//w  w  w. jav a2  s . c om
    }
    return null;
}

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From source file:org.apache.catalina.cluster.tcp.TcpReplicationThread.java

/**
 * The actual code which drains the channel associated with
 * the given key.  This method assumes the key has been
 * modified prior to invocation to turn off selection
 * interest in OP_READ.  When this method completes it
 * re-enables OP_READ and calls wakeup() on the selector
 * so the selector will resume watching this channel.
 *///from  ww w.java 2  s  .c  o  m
private void drainChannel(SelectionKey key) throws Exception {
    boolean packetReceived = false;
    SocketChannel channel = (SocketChannel) key.channel();
    int count;
    buffer.clear(); // make buffer empty
    ObjectReader reader = (ObjectReader) key.attachment();
    // loop while data available, channel is non-blocking
    while ((count = channel.read(buffer)) > 0) {
        buffer.flip(); // make buffer readable
        int pkgcnt = reader.append(buffer.array(), 0, count);
        buffer.clear(); // make buffer empty
    }
    //check to see if any data is available
    int pkgcnt = reader.execute();
    while (pkgcnt > 0) {
        if (synchronous) {
            sendAck(key, channel);
        } //end if
        pkgcnt--;
    }
    if (count < 0) {
        // close channel on EOF, invalidates the key
        channel.close();
        return;
    }
    // resume interest in OP_READ, OP_WRITE
    key.interestOps(key.interestOps() | SelectionKey.OP_READ);
    // cycle the selector so this key is active again
    key.selector().wakeup();
}

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