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java.nio.channels
Class SelectionKey

java.lang.Object
  extended by java.nio.channels.SelectionKey
Direct Known Subclasses:
AbstractSelectionKey
See Also:
Top Examples, Source Code, attach, validOps(), interestOps(int), isValid, cancel, Selector
public final Object attach(Object ob)
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public final Object attachment()
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public abstract void cancel()
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public abstract SelectableChannel channel()
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public abstract int interestOps()
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CancelledKeyException
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public abstract SelectionKey interestOps(int ops)
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CancelledKeyException, IllegalArgumentException
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public final boolean isAcceptable()
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CancelledKeyException
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public final boolean isConnectable()
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CancelledKeyException
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public final boolean isReadable()
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CancelledKeyException
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public abstract boolean isValid()
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public final boolean isWritable()
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CancelledKeyException
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public static final int OP_ACCEPT
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public static final int OP_CONNECT
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public static final int OP_READ
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public static final int OP_WRITE
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[1766]Use of OP_WRITE
By Anonymous on 2006/05/31 11:16:32  Rate
When building a scalable NIO server, you always have to handle three important NIO operation set bit: 
  
  
     * OP_ACCEPT: Operation-set bit for socket-accept operations 
     * OP_READ: Operation-set bit for read operations 
     * OP_WRITE: Operation-set bit for write operations 
  
  
 Handling OP_ACCEPT and OP_READ has been well documented in several NIO tutorial. Strangely, the OP_WRITE is sometimes not described at all. Not handling the OP_WRITE correctly can make your server performance pretty bad, and on win32, can produce disastrous performance problem, like freezing the OS by eating all the CPU.
public abstract int readyOps()
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CancelledKeyException
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protected SelectionKey()
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public abstract Selector selector()
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