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Java Source Code / Java Documentation » Sevlet Container » jetty modules » org.mortbay.thread

Source Cross Reference

Class Diagram

Java Document (Java Doc)

java.lang .Object

org.mortbay.component .AbstractLifeCycle

org.mortbay.thread .BoundedThreadPool

All known Subclasses:   org.mortbay.util .IO,
BoundedThreadPool
public class BoundedThreadPool extends AbstractLifeCycle implements Serializable,ThreadPool(Code)
A pool of threads.
Avoids the expense of thread creation by pooling threads after their run methods exit for reuse.
If the maximum pool size is reached, jobs wait for a free thread. By default there is no maximum pool size. Idle threads timeout and terminate until the minimum number of threads are running.

author:
   Greg Wilkins
author:
   Juancarlo Anez

Inner Class :public class PoolThread extends Thread

Field Summary
int _priority


Constructor Summary
public BoundedThreadPool()


Method Summary
public boolean dispatch(Runnable job)
     Run job.
protected void doStart()

protected void doStop()
     Stop the BoundedThreadPool.
public int getIdleThreads()
     Get the number of idle threads in the pool.
public int getLowThreads()

public int getMaxIdleTimeMs()
     Get the maximum thread idle time.
public int getMaxThreads()
     Set the maximum number of threads.
public int getMinThreads()
     Get the minimum number of threads.
public String getName()

public int getThreads()
     Get the number of threads in the pool.
public int getThreadsPriority()
     Get the priority of the pool threads.
public boolean isDaemon()
     Delegated to the named or anonymous Pool.
public boolean isLowOnThreads()

public void join()

protected void newThread()

public void setDaemon(boolean daemon)
     Delegated to the named or anonymous Pool.
public void setLowThreads(int lowThreads)

public void setMaxIdleTimeMs(int maxIdleTimeMs)
     Set the maximum thread idle time.
public void setMaxThreads(int maxThreads)
     Set the maximum number of threads.
public void setMinThreads(int minThreads)
     Set the minimum number of threads.
public void setName(String name)

public void setThreadsPriority(int priority)
     Set the priority of the pool threads.
protected void stopJob(Thread thread, Object job)
     Stop a Job.

Field Detail
_priority
int _priority(Code)

Constructor Detail
BoundedThreadPool
public BoundedThreadPool()(Code)

Method Detail
dispatch
public boolean dispatch(Runnable job)(Code)
Run job. true if the job was given to a thread, false if no thread wasavailable.

doStart
protected void doStart() throws Exception(Code)

doStop
protected void doStop() throws Exception(Code)
Stop the BoundedThreadPool. New jobs are no longer accepted,idle threads are interrupted and stopJob is called on active threads. The method then waits min(getMaxStopTimeMs(),getMaxIdleTimeMs()), for all jobs to stop, at which time killJob is called.

getIdleThreads
public int getIdleThreads()(Code)
Get the number of idle threads in the pool.
See Also:   BoundedThreadPool.getThreads Number of threads

getLowThreads
public int getLowThreads()(Code)
low resource threads threshhold

getMaxIdleTimeMs
public int getMaxIdleTimeMs()(Code)
Get the maximum thread idle time. Delegated to the named or anonymous Pool.
See Also:   BoundedThreadPool.setMaxIdleTimeMs Max idle time in ms.

getMaxThreads
public int getMaxThreads()(Code)
Set the maximum number of threads. Delegated to the named or anonymous Pool.
See Also:   BoundedThreadPool.setMaxThreads maximum number of threads.

getMinThreads
public int getMinThreads()(Code)
Get the minimum number of threads. Delegated to the named or anonymous Pool.
See Also:   BoundedThreadPool.setMinThreads minimum number of threads.

getName
public String getName()(Code)
The name of the BoundedThreadPool.

getThreads
public int getThreads()(Code)
Get the number of threads in the pool.
See Also:   BoundedThreadPool.getIdleThreads Number of threads

getThreadsPriority
public int getThreadsPriority()(Code)
Get the priority of the pool threads. the priority of the pool threads.

isDaemon
public boolean isDaemon()(Code)
Delegated to the named or anonymous Pool.

isLowOnThreads
public boolean isLowOnThreads()(Code)

join
public void join() throws InterruptedException(Code)

newThread
protected void newThread()(Code)

setDaemon
public void setDaemon(boolean daemon)(Code)
Delegated to the named or anonymous Pool.

setLowThreads
public void setLowThreads(int lowThreads)(Code)

Parameters:
  lowThreads - low resource threads threshhold

setMaxIdleTimeMs
public void setMaxIdleTimeMs(int maxIdleTimeMs)(Code)
Set the maximum thread idle time. Threads that are idle for longer than this period may be stopped. Delegated to the named or anonymous Pool.
See Also:   BoundedThreadPool.getMaxIdleTimeMs
Parameters:
  maxIdleTimeMs - Max idle time in ms.

setMaxThreads
public void setMaxThreads(int maxThreads)(Code)
Set the maximum number of threads. Delegated to the named or anonymous Pool.
See Also:   BoundedThreadPool.getMaxThreads
Parameters:
  maxThreads - maximum number of threads.

setMinThreads
public void setMinThreads(int minThreads)(Code)
Set the minimum number of threads. Delegated to the named or anonymous Pool.
See Also:   BoundedThreadPool.getMinThreads
Parameters:
  minThreads - minimum number of threads

setName
public void setName(String name)(Code)

Parameters:
  name - Name of the BoundedThreadPool to use when naming Threads.

setThreadsPriority
public void setThreadsPriority(int priority)(Code)
Set the priority of the pool threads.
Parameters:
  priority - the new thread priority.

stopJob
protected void stopJob(Thread thread, Object job)(Code)
Stop a Job. This method is called by the Pool if a job needs to be stopped. The default implementation does nothing and should be extended by a derived thread pool class if special action is required.
Parameters:
  thread - The thread allocated to the job, or null if no thread allocated.
Parameters:
  job - The job object passed to run.

Methods inherited from org.mortbay.component.AbstractLifeCycle
protected void doStart() throws Exception(Code)(Java Doc)
protected void doStop() throws Exception(Code)(Java Doc)
public boolean isFailed()(Code)(Java Doc)
public boolean isRunning()(Code)(Java Doc)
public boolean isStarted()(Code)(Java Doc)
public boolean isStarting()(Code)(Java Doc)
public boolean isStopped()(Code)(Java Doc)
public boolean isStopping()(Code)(Java Doc)
final public void start() throws Exception(Code)(Java Doc)
final public void stop() throws Exception(Code)(Java Doc)

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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