org.eclipse.jetty.io.nio

Class SelectorManager

java.lang.Object

org.eclipse.jetty.util.component.AbstractLifeCycle

org.eclipse.jetty.io.nio.SelectorManager

All Implemented Interfaces:

Dumpable, LifeCycle

public abstract class SelectorManager
extends AbstractLifeCycle
implements Dumpable

The Selector Manager manages and number of SelectSets to allow NIO scheduling to scale to large numbers of connections.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	SelectorManager.SelectSet

Nested classes/interfaces inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

AbstractLifeCycle.AbstractLifeCycleListener

Nested classes/interfaces inherited from interface org.eclipse.jetty.util.component.LifeCycle

LifeCycle.Listener

Field Summary

Fields

Modifier and Type	Field and Description
static Logger	LOG

Fields inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

_listeners, FAILED, RUNNING, STARTED, STARTING, STOPPED, STOPPING

Constructor Summary

Constructors

Constructor and Description
SelectorManager()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	connectionFailed(SocketChannel channel, Throwable ex, Object attachment)
abstract boolean	dispatch(Runnable task)
protected void	doStart()
protected void	doStop()
String	dump()
void	dump(Appendable out, String indent)
protected abstract void	endPointClosed(SelectChannelEndPoint endpoint)
protected abstract void	endPointOpened(SelectChannelEndPoint endpoint)
protected abstract void	endPointUpgraded(ConnectedEndPoint endpoint, Connection oldConnection)
long	getLowResourcesConnections()
long	getLowResourcesMaxIdleTime()
long	getMaxIdleTime()
int	getSelectorPriorityDelta()
SelectorManager.SelectSet	getSelectSet(int i)
int	getSelectSets()
boolean	isDeferringInterestedOps0()
abstract AsyncConnection	newConnection(SocketChannel channel, AsyncEndPoint endpoint, Object attachment)
protected abstract SelectChannelEndPoint	newEndPoint(SocketChannel channel, SelectorManager.SelectSet selectSet, SelectionKey sKey) Create a new end point
void	register(ServerSocketChannel acceptChannel) Register a ServerSocketChannel
void	register(SocketChannel channel) Register a channel
void	register(SocketChannel channel, Object att) Register a channel
void	setDeferringInterestedOps0(boolean deferringInterestedOps0)
void	setLowResourcesConnections(long lowResourcesConnections) Set the number of connections, which if exceeded places this manager in low resources state.
void	setLowResourcesMaxIdleTime(long lowResourcesMaxIdleTime)
void	setMaxIdleTime(long maxIdleTime)
void	setSelectorPriorityDelta(int delta) Set the selector thread priorty delta.
void	setSelectSets(int selectSets)

Methods inherited from class org.eclipse.jetty.util.component.AbstractLifeCycle

addLifeCycleListener, getState, getState, isFailed, isRunning, isStarted, isStarting, isStopped, isStopping, removeLifeCycleListener, start, stop

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final Logger LOG

Constructor Detail

SelectorManager

public SelectorManager()

Method Detail

setMaxIdleTime

public void setMaxIdleTime(long maxIdleTime)

Parameters:

maxIdleTime - The maximum period in milli seconds that a connection may be idle before it is closed.

See Also:

setLowResourcesMaxIdleTime(long)

setSelectSets

public void setSelectSets(int selectSets)

Parameters:

selectSets - number of select sets to create

getMaxIdleTime

public long getMaxIdleTime()

Returns:

the max idle time

getSelectSets

public int getSelectSets()

Returns:

the number of select sets in use

getSelectSet

public SelectorManager.SelectSet getSelectSet(int i)

Parameters:

i -

Returns:

The select set

register

public void register(SocketChannel channel,
            Object att)

Register a channel

Parameters:

channel -

att - Attached Object

register

public void register(SocketChannel channel)

Register a channel

Parameters:

channel -

register

public void register(ServerSocketChannel acceptChannel)

Register a ServerSocketChannel

Parameters:

acceptChannel -

getSelectorPriorityDelta

public int getSelectorPriorityDelta()

Returns:

delta The value to add to the selector thread priority.

setSelectorPriorityDelta

public void setSelectorPriorityDelta(int delta)

Set the selector thread priorty delta.

Parameters:

delta - The value to add to the selector thread priority.

getLowResourcesConnections

public long getLowResourcesConnections()

Returns:

the lowResourcesConnections

setLowResourcesConnections

public void setLowResourcesConnections(long lowResourcesConnections)

Set the number of connections, which if exceeded places this manager in low resources state. This is not an exact measure as the connection count is averaged over the select sets.

Parameters:

lowResourcesConnections - the number of connections

See Also:

setLowResourcesMaxIdleTime(long)

getLowResourcesMaxIdleTime

public long getLowResourcesMaxIdleTime()

Returns:

the lowResourcesMaxIdleTime

setLowResourcesMaxIdleTime

public void setLowResourcesMaxIdleTime(long lowResourcesMaxIdleTime)

Parameters:

lowResourcesMaxIdleTime - the period in ms that a connection is allowed to be idle when this SelectSet has more connections than getLowResourcesConnections()

See Also:

setMaxIdleTime(long)

dispatch

public abstract boolean dispatch(Runnable task)

doStart

protected void doStart()
                throws Exception

Overrides:

doStart in class AbstractLifeCycle

Throws:

Exception

doStop

protected void doStop()
               throws Exception

Overrides:

doStop in class AbstractLifeCycle

Throws:

Exception

endPointClosed

protected abstract void endPointClosed(SelectChannelEndPoint endpoint)

Parameters:

endpoint -

endPointOpened

protected abstract void endPointOpened(SelectChannelEndPoint endpoint)

Parameters:

endpoint -

endPointUpgraded

protected abstract void endPointUpgraded(ConnectedEndPoint endpoint,
                    Connection oldConnection)

newConnection

public abstract AsyncConnection newConnection(SocketChannel channel,
                            AsyncEndPoint endpoint,
                            Object attachment)

newEndPoint

protected abstract SelectChannelEndPoint newEndPoint(SocketChannel channel,
                                SelectorManager.SelectSet selectSet,
                                SelectionKey sKey)
                                              throws IOException

Create a new end point

Parameters:

channel -

selectSet -

sKey - the selection key

Returns:

the new endpoint SelectChannelEndPoint

Throws:

IOException

connectionFailed

protected void connectionFailed(SocketChannel channel,
                    Throwable ex,
                    Object attachment)

dump

public String dump()

Specified by:

dump in interface Dumpable

dump

public void dump(Appendable out,
        String indent)
          throws IOException

Specified by:

dump in interface Dumpable

Throws:

IOException

isDeferringInterestedOps0

public boolean isDeferringInterestedOps0()

setDeferringInterestedOps0

public void setDeferringInterestedOps0(boolean deferringInterestedOps0)