com.barchart.udt.nio
Class SelectorUDT

java.lang.Object
  java.nio.channels.Selector
      java.nio.channels.spi.AbstractSelector
          com.barchart.udt.nio.SelectorUDT

public class SelectorUDT
extends AbstractSelector

selector

design guidelines:

1) follow general contracts of jdk 6 nio; see barchart-udt-reference-jdk6

2) adapt to how netty is doing select; see NioEventLoop

note: you must use SelectorProviderUDT.openSelector() to obtain instance of this class; do not use JDK Selector.open()

Field Summary

protected static org.slf4j.Logger	log
int	maximimSelectorSize

Constructor Summary

protected

SelectorUDT(SelectorProvider provider, int maximumSelectorSize)

Method Summary

protected void	cancel(SelectionKeyUDT keyUDT) Enqueue cancel request.
protected void	doCancel() Process pending cancel requests.
protected int	doEpollEnter(long millisTimeout)
protected int	doEpollExclusive(long millisTimeout)
protected int	doEpollSelect(long millisTimeout)
protected int	doEpollSelectUDT(long timeout)
protected void	doResults()
protected void	doResultsRead(int resultIndex)
protected void	doResultsWrite(int resultIndex)
protected EpollUDT	epollUDT()
protected void	implCloseSelector()
Set<SelectionKey>	keys()
protected void	logSocketId(String title, int socketId)
protected static Selector	open(TypeUDT type) use this call to instantiate a selector for UDT
protected SelectionKey	register(AbstractSelectableChannel channel, int interestOps, Object attachment)
int	select()
int	select(long timeout)
Set<SelectionKey>	selectedKeys()
int	selectNow()
Selector	wakeup()
protected boolean	wakeupIsPending()
protected void	wakeupMarkBase()

Methods inherited from class java.nio.channels.spi.AbstractSelector

begin, cancelledKeys, close, deregister, end, isOpen, provider

Methods inherited from class java.nio.channels.Selector

open

Methods inherited from class java.lang.Object

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

Field Detail

log

protected static final org.slf4j.Logger log

maximimSelectorSize

public final int maximimSelectorSize

Constructor Detail

SelectorUDT

protected SelectorUDT(SelectorProvider provider,
                      int maximumSelectorSize)
               throws ExceptionUDT

Throws:

ExceptionUDT

Method Detail

open

protected static Selector open(TypeUDT type)
                        throws IOException

use this call to instantiate a selector for UDT

Throws:

IOException

cancel

protected void cancel(SelectionKeyUDT keyUDT)

Enqueue cancel request.

doCancel

protected void doCancel()

Process pending cancel requests.

doEpollEnter

protected int doEpollEnter(long millisTimeout)
                    throws IOException

Parameters:

millisTimeout - <0 : invinite; =0 : immediate; >0 : finite;

Throws:

IOException

doEpollExclusive

protected int doEpollExclusive(long millisTimeout)
                        throws IOException

Parameters:

millisTimeout - <0 : invinite; =0 : immediate; >0 : finite;

Returns:

<0 : should not happen =0 : means nothing was selected/timeout >0 : number of selected keys

Throws:

IOException

doEpollSelect

protected int doEpollSelect(long millisTimeout)
                     throws ExceptionUDT

Parameters:

millisTimeout - <0 : infinite =0 : immediate >0 : finite

Throws:

ExceptionUDT

doEpollSelectUDT

protected int doEpollSelectUDT(long timeout)
                        throws ExceptionUDT

Throws:

ExceptionUDT

doResults

protected void doResults()

doResultsRead

protected void doResultsRead(int resultIndex)

doResultsWrite

protected void doResultsWrite(int resultIndex)

epollUDT

protected EpollUDT epollUDT()

implCloseSelector

protected void implCloseSelector()
                          throws IOException

Specified by:

implCloseSelector in class AbstractSelector

Throws:

IOException

keys

public Set<SelectionKey> keys()

Specified by:

keys in class Selector

logSocketId

protected void logSocketId(String title,
                           int socketId)

register

protected SelectionKey register(AbstractSelectableChannel channel,
                                int interestOps,
                                Object attachment)

Specified by:

register in class AbstractSelector

select

public int select()
           throws IOException

Specified by:

select in class Selector

Throws:

IOException

select

public int select(long timeout)
           throws IOException

Specified by:

select in class Selector

Throws:

IOException

selectedKeys

public Set<SelectionKey> selectedKeys()

Specified by:

selectedKeys in class Selector

selectNow

public int selectNow()
              throws IOException

Specified by:

selectNow in class Selector

Throws:

IOException

wakeup

public Selector wakeup()

Specified by:

wakeup in class Selector

wakeupIsPending

protected boolean wakeupIsPending()

wakeupMarkBase

protected void wakeupMarkBase()