java.nio.channels.spi

Class AbstractSelector

java.lang.Object

java.nio.channels.Selector

java.nio.channels.spi.AbstractSelector

public abstract class AbstractSelector
extends Selector

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractSelector(SelectorProvider provider) Initializes the slector.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	begin() Marks the beginning of an I/O operation that might block indefinitely.
protected Set<SelectionKey>	cancelledKeys() Returns the cancelled keys set.
void	close() Closes the channel.
protected void	deregister(AbstractSelectionKey key) Deregisters the given selection key.
protected void	end() Marks the end of an I/O operation that might block indefinitely.
protected abstract void	implCloseSelector() Closes the channel.
boolean	isOpen() Tells whether this channel is open or not.
SelectorProvider	provider() Returns the provider for this selector object.
protected abstract SelectionKey	register(AbstractSelectableChannel ch, int ops, Object att) Registers a channel for the selection process.

Methods inherited from class java.nio.channels.Selector

keys, open, select, select, selectedKeys, selectNow, wakeup

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AbstractSelector

protected AbstractSelector(SelectorProvider provider)

Initializes the slector.

Parameters:

provider - the provider that created this selector

Method Detail

close

public final void close()
                 throws IOException

Closes the channel.

Specified by:

close in class Selector

Throws:

IOException - If an error occurs

isOpen

public final boolean isOpen()

Tells whether this channel is open or not.

Specified by:

isOpen in class Selector

Returns:

true if channel is open, false otherwise.

begin

protected final void begin()

Marks the beginning of an I/O operation that might block indefinitely.

end

protected final void end()

Marks the end of an I/O operation that might block indefinitely.

provider

public final SelectorProvider provider()

Returns the provider for this selector object.

Specified by:

provider in class Selector

Returns:

the SelectorProvider object that created this seletor

cancelledKeys

protected final Set<SelectionKey> cancelledKeys()

Returns the cancelled keys set.

Returns:

the cancelled keys set

implCloseSelector

protected abstract void implCloseSelector()
                                   throws IOException

Closes the channel.

Throws:

IOException - if an error occurs

register

protected abstract SelectionKey register(AbstractSelectableChannel ch,
                    int ops,
                    Object att)

Registers a channel for the selection process.

Parameters:

ch - the channel register

ops - the interested operations

att - an attachement to the selection key

Returns:

the registered selection key

deregister

protected final void deregister(AbstractSelectionKey key)

Deregisters the given selection key.

Parameters:

key - the key to deregister