java.nio.channels.spi: abstract public class: AbstractSelectionKey

java.nio.channels.spi
abstract public class: AbstractSelectionKey [javadoc | source]

java.lang.Object
   java.nio.channels.SelectionKey
      java.nio.channels.spi.AbstractSelectionKey

Base implementation class for selection keys.

This class tracks the validity of the key and implements cancellation.

author: Mark - Reinhold

author: JSR-51 - Expert Group

since: 1.4 -

Fields inherited from java.nio.channels.SelectionKey:
OP_READ, OP_WRITE, OP_CONNECT, OP_ACCEPT

Constructor:
protected AbstractSelectionKey() { } Initializes a new instance of this class.

Constructor:

 protected AbstractSelectionKey() {

}

Initializes a new instance of this class.

Method from java.nio.channels.spi.AbstractSelectionKey Summary:
cancel, invalidate, isValid

Methods from java.nio.channels.SelectionKey:
attach, attachment, cancel, channel, interestOps, interestOps, isAcceptable, isConnectable, isReadable, isValid, isWritable, readyOps, selector

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from java.nio.channels.spi.AbstractSelectionKey Detail:
public final void cancel() { // Synchronizing "this" to prevent this key from getting canceled // multiple times by different threads, which might cause race // condition between selector's select() and channel's close(). synchronized (this) { if (valid) { valid = false; ((AbstractSelector)selector()).cancel(this); } } } Cancels this key. If this key has not yet been cancelled then it is added to its selector's cancelled-key set while synchronized on that set.
void invalidate() { // package-private valid = false; }
public final boolean isValid() { return valid; }

Method from java.nio.channels.spi.AbstractSelectionKey Detail:

 public final  void cancel() {
        // Synchronizing "this" to prevent this key from getting canceled
        // multiple times by different threads, which might cause race
        // condition between selector's select() and channel's close().
        synchronized (this) {
            if (valid) {
                valid = false;
                ((AbstractSelector)selector()).cancel(this);
            }
        }
}

If this key has not yet been cancelled then it is added to its selector's cancelled-key set while synchronized on that set.

  void invalidate() {
                                 // package-private
        valid = false;
}

 public final boolean isValid() {
        
        return valid;
}