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Java Source Code / Java Documentation » J2EE » ICEfaces 1.6.1 » com.icesoft.faces.async.render

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

com.icesoft.faces.async.render .RenderHub

RenderHub
public class RenderHub (Code)
	The RenderHub is designed to handle all server-side rendering calls. Although it can be created programmatically, it is recommended that the application developer use a RenderManager instance for all rendering duties and for creating named GroupAsyncRenderer)s. The RenderManager createsand uses its own RenderHub for all rendering. A single RenderHub should handle all server-side rendering duties in a thread-safe and efficient manner. It uses a specialized queue to hold Renderable instances and a thread pool to render each Renderable on the queue. The queue will only keep a single entry of any particular Renderable. Subsequent Renderables that are offered to the queue for rendering are discarded since any pending render call will update the client to the latest state. This coalescing of render calls makes it safer and more efficient for the application developer to add rendering into their application. author: ICEsoft Technologies, Inc. See Also: RenderManager

Constructor Summary
public	RenderHub() Public constructor.

Method Summary
protected synchronized void	createScheduledService()
public void	dispose() Cleanly disposes of the RenderHub's resources.
public int	getCorePoolSize() Get the starting size of the core thread pool.
public long	getKeepAliveTime() Get the keep alive time of threads above the core number.
public int	getMaxPoolSize() Get the maximum size of the core thread pool.
public int	getRenderQueueCapacity() Get the capacity of the core render service queue.
public int	getSchedulePoolSize() Get the thread pool size of the scheduled render service.
public ScheduledThreadPoolExecutor	getScheduledService() As a secondary responsibility, the RenderHub also maintains a thread pool for render calls that should occur in the future.
public void	requestRender(Renderable renderable) The prime responsibility of the RenderHub is to perform a render call on the submitted Renderable.
public void	setCorePoolSize(int corePoolSize) Set the thread pool size of the core render service.
public void	setKeepAliveTime(long keepAliveTime) Set the amount of idle time to keep threads created above the core size.
public void	setMaxPoolSize(int maxPoolSize) Set the maximum thread pool size of the core render service.
public void	setRenderQueueCapacity(int renderQueueCapacity)
public void	setSchedulePoolSize(int schedulePoolSize) Set the thread pool size of the scheduled render service.

Constructor Detail

RenderHub
public RenderHub()(Code)
	Public constructor. Although it possible for developers to construct and use their own RenderHub, it is highly recommended that a RenderManager be used. The RenderManager creates and uses it's own internal RenderHub.

Method Detail

createScheduledService
protected synchronized void createScheduledService()(Code)

dispose
public void dispose()(Code)
	Cleanly disposes of the RenderHub's resources. Used by the RenderManager when the application shuts down.

getCorePoolSize
public int getCorePoolSize()(Code)
	Get the starting size of the core thread pool. The starting size of the core thread pool.

getKeepAliveTime
public long getKeepAliveTime()(Code)
	Get the keep alive time of threads above the core number. The number of threads that are created past the core number (up to the maximum number) are kept alive until they are idle for the keep alive time. The keep alive time for threads created past the core number.

getMaxPoolSize
public int getMaxPoolSize()(Code)
	Get the maximum size of the core thread pool. The maximum size of the core thread pool.

getRenderQueueCapacity
public int getRenderQueueCapacity()(Code)
	Get the capacity of the core render service queue. The capacity of the core render service queue.

getSchedulePoolSize
public int getSchedulePoolSize()(Code)
	Get the thread pool size of the scheduled render service. the size of the schedule service thread pool

getScheduledService
public ScheduledThreadPoolExecutor getScheduledService()(Code)
	As a secondary responsibility, the RenderHub also maintains a thread pool for render calls that should occur in the future. This service is used by renderers such as the IntervalRenderer and DelayRenderer to delay the eventual render calls. All the rendering is still handled by the RenderHubs core thread pool/queue. The scheduled service is used to delay when that occurs. Having this supplied by the RenderHub ensures that there is only one. A scheduling service.

requestRender
public void requestRender(Renderable renderable)(Code)
	The prime responsibility of the RenderHub is to perform a render call on the submitted Renderable. Each call to this method is submitted and, if not already in the queue, placed on the queue to be rendered. The thread pool is created here if does not yet exist using whatever configuration values have been set. Parameters: renderable - The Renderable instance to add to the rendering queue.

setCorePoolSize
public void setCorePoolSize(int corePoolSize)(Code)
	Set the thread pool size of the core render service. The default is 10. This number will need to be adjusted based on the characteristics of the application. Note that increasing the number of threads past a certain number (based on OS, JVM, etc) can actually decrease performance as thread context switching becomes a burden. Parameters: corePoolSize - The number of threads to dedicate to the scheduledservice thread pool.

setKeepAliveTime
public void setKeepAliveTime(long keepAliveTime)(Code)
	Set the amount of idle time to keep threads created above the core size. The default is 300000 ms. Parameters: keepAliveTime - The idle time in ms to keep additional threadsalive.

setMaxPoolSize
public void setMaxPoolSize(int maxPoolSize)(Code)
	Set the maximum thread pool size of the core render service. The default is 15. This number will need to be adjusted based on the characteristics of the application. Note that increasing the number of threads past a certain number (based on OS, JVM, etc) can actually decrease performance as thread context switching becomes a burden. Parameters: maxPoolSize - The maximum number of threads to dedicate to the coreservice thread pool.

setRenderQueueCapacity
public void setRenderQueueCapacity(int renderQueueCapacity)(Code)

setSchedulePoolSize
public void setSchedulePoolSize(int schedulePoolSize)(Code)
	Set the thread pool size of the scheduled render service. The default is 5 and unless you have a lot of renderers that use the scheduling service, it should really be more than enough. Parameters: schedulePoolSize - The number of threads to dedicate to thescheduled service thread pool.

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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