com.barchart.udt.nio
Class SelectionKeyUDT

java.lang.Object
  java.nio.channels.SelectionKey
      com.barchart.udt.nio.SelectionKeyUDT

All Implemented Interfaces:

Comparable<SelectionKeyUDT>

public class SelectionKeyUDT
extends SelectionKey
implements Comparable<SelectionKeyUDT>

UDT selection key implementation.

Field Summary

protected static int	HAS_READ JDK interest to Epoll READ mapping.
protected static int	HAS_WRITE JDK interest to Epoll WRITE mapping.
protected static org.slf4j.Logger	log

Fields inherited from class java.nio.channels.SelectionKey

OP_ACCEPT, OP_CONNECT, OP_READ, OP_WRITE

Constructor Summary

protected

SelectionKeyUDT(SelectorUDT selectorUDT, ChannelUDT channelUDT, Object attachment)

Method Summary

protected void	assertValidKey() Ensure key is NOT canceled.
protected void	assertValidOps(int interestOps) Ensure only permitted interest mask bits are present.
void	cancel()
SelectableChannel	channel()
protected ChannelUDT	channelUDT() Underlying UDT channel.
int	compareTo(SelectionKeyUDT that)
protected boolean	doRead(int resultIndex) Apply READ readiness according to KindUDT channel role.
protected boolean	doWrite(int resultIndex) Apply WRITE readiness according to KindUDT channel role.
protected EpollUDT.Opt	epollOpt() Requested interest in epoll format.
protected EpollUDT	epollUDT() Epoll bound to this key.
boolean	equals(Object otherKey) Key equality based on socket-id.
protected static EpollUDT.Opt	from(int interestOps) Convert select options : from jdk into epoll.
int	hashCode() Key hach code based on socket-id.
int	interestOps()
SelectionKey	interestOps(int interestOps)
protected boolean	isSocketBroken() Check socket termination status.
boolean	isValid()
protected KindUDT	kindUDT() Channel role.
protected void	logError(String comment) Key processing logic error logger.
protected void	makeValid(boolean isValid) Change socket registration with epoll, and change key validity status.
int	readyOps()
protected void	readyOps(int ops)
SelectorUDT	selector()
protected int	socketId() Id of a socket bound to this key.
protected SocketUDT	socketUDT() Socket bound to this key.
String	toString()
static String	toStringOps(int selectOps) Render select options.

Methods inherited from class java.nio.channels.SelectionKey

attach, attachment, isAcceptable, isConnectable, isReadable, isWritable

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

HAS_READ

protected static final int HAS_READ

JDK interest to Epoll READ mapping.

See Also:

Constant Field Values

HAS_WRITE

protected static final int HAS_WRITE

JDK interest to Epoll WRITE mapping.

See Also:

Constant Field Values

log

protected static final org.slf4j.Logger log

Constructor Detail

SelectionKeyUDT

protected SelectionKeyUDT(SelectorUDT selectorUDT,
                          ChannelUDT channelUDT,
                          Object attachment)

Method Detail

from

protected static EpollUDT.Opt from(int interestOps)

Convert select options : from jdk into epoll.

toStringOps

public static final String toStringOps(int selectOps)

Render select options.

assertValidKey

protected void assertValidKey()
                       throws CancelledKeyException

Ensure key is NOT canceled.

Throws:

CancelledKeyException

assertValidOps

protected void assertValidOps(int interestOps)

Ensure only permitted interest mask bits are present.

cancel

public void cancel()

Specified by:

cancel in class SelectionKey

channel

public SelectableChannel channel()

Specified by:

channel in class SelectionKey

channelUDT

protected ChannelUDT channelUDT()

Underlying UDT channel.

compareTo

public int compareTo(SelectionKeyUDT that)

Specified by:

compareTo in interface Comparable<SelectionKeyUDT>

doRead

protected boolean doRead(int resultIndex)

Apply READ readiness according to KindUDT channel role.

Note: doRead(int) is invoked before doWrite(int)

Sockets with exceptions are returned to both read and write sets.

Returns:

Should report ready-state change?

doWrite

protected boolean doWrite(int resultIndex)

Apply WRITE readiness according to KindUDT channel role.

Note: doRead(int) is invoked before doWrite(int)

Sockets with exceptions are returned to both read and write sets.

Returns:

Should report ready-state change?

epollOpt

protected EpollUDT.Opt epollOpt()

Requested interest in epoll format.

epollUDT

protected EpollUDT epollUDT()

Epoll bound to this key.

equals

public boolean equals(Object otherKey)

Key equality based on socket-id.

Overrides:

equals in class Object

hashCode

public int hashCode()

Key hach code based on socket-id.

Overrides:

hashCode in class Object

interestOps

public int interestOps()

Specified by:

interestOps in class SelectionKey

interestOps

public SelectionKey interestOps(int interestOps)

Specified by:

interestOps in class SelectionKey

isSocketBroken

protected boolean isSocketBroken()

Check socket termination status.

Returns:

true if status is StatusUDT.BROKEN or worse

isValid

public boolean isValid()

Specified by:

isValid in class SelectionKey

kindUDT

protected KindUDT kindUDT()

Channel role.

logError

protected void logError(String comment)

Key processing logic error logger.

makeValid

protected void makeValid(boolean isValid)

Change socket registration with epoll, and change key validity status.

readyOps

public int readyOps()

Specified by:

readyOps in class SelectionKey

readyOps

protected void readyOps(int ops)

selector

public SelectorUDT selector()

Specified by:

selector in class SelectionKey

socketId

protected int socketId()

Id of a socket bound to this key.

socketUDT

protected SocketUDT socketUDT()

Socket bound to this key.

toString

public String toString()

Overrides:

toString in class Object