Package com.sun.corba.ee.impl.threadpool
Class ThreadPoolImpl
java.lang.Object
com.sun.corba.ee.impl.threadpool.ThreadPoolImpl
- All Implemented Interfaces:
ThreadPool
,Closeable
,AutoCloseable
@ManagedObject
@Description("A ThreadPool used by the ORB")
public class ThreadPoolImpl
extends Object
implements ThreadPool
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Nested Class Summary
Nested Classes -
Field Summary
FieldsModifier and TypeFieldDescriptionprivate int
private int
static final int
private final long
private final int
private final int
private final String
private AtomicLong
private static final AtomicInteger
private ThreadGroup
private AtomicLong
(package private) List
<ThreadPoolImpl.WorkerThread> (package private) final Object
private final ClassLoader
private final WorkQueue
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Constructor Summary
ConstructorsConstructorDescriptionThreadPoolImpl
(int minSize, int maxSize, long timeout, String threadpoolName) Create a bounded thread pool in the current thread group with the current context ClassLoader as the worker thread default ClassLoader.ThreadPoolImpl
(int minSize, int maxSize, long timeout, String threadpoolName, ClassLoader defaultClassLoader) Create a bounded thread pool in the current thread group with the given ClassLoader as the worker thread default ClassLoader.ThreadPoolImpl
(String threadpoolName) Create an unbounded thread pool in the current thread group with the current context ClassLoader as the worker thread default ClassLoader.ThreadPoolImpl
(ThreadGroup tg, String threadpoolName) Create an unbounded thread pool in the given thread group with the current context ClassLoader as the worker thread default ClassLoader.ThreadPoolImpl
(ThreadGroup tg, String threadpoolName, ClassLoader defaultClassLoader) Create an unbounded thread pool in the given thread group with the given ClassLoader as the worker thread default ClassLoader. -
Method Summary
Modifier and TypeMethodDescriptionlong
This method returns the average elapsed time taken to complete a Work item.void
close()
(package private) void
To be called from the WorkQueue to create worker threads when none available.private Thread
int
This method will return the current number of threads in the threadpool.long
This method returns the number of Work items processed by the threadpool(package private) void
(package private) void
This method will decrement the number of available threads in the threadpool which are waiting for work.This method will return any instance of the WorkQueue.private static ClassLoader
getName()
This method will return the name of the threadpool.private static int
getWorkQueue
(int queueId) This method will return an instance of the of the WorkQueue given a queueId.long
This method will return the time in milliseconds when idle threads in the threadpool are removed.(package private) void
(package private) void
This method will increment the number of available threads in the threadpool which are waiting for work.int
This method will return the maximum number of threads in the threadpool at any point in time, for the life of the threadpoolint
This method will return the minimum number of threads maintained by the threadpool.int
This method will return the number of available threads in the threadpool which are waiting for work.int
This method will return the number of busy threads in the threadpool This method returns a value which is not synchronized.int
This method will return the number of WorkQueues serviced by the threadpool.
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Field Details
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DEFAULT_INACTIVITY_TIMEOUT
public static final int DEFAULT_INACTIVITY_TIMEOUT- See Also:
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threadCounter
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workQueue
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availableWorkerThreads
private int availableWorkerThreads -
currentThreadCount
private int currentThreadCount -
minWorkerThreads
private final int minWorkerThreads -
maxWorkerThreads
private final int maxWorkerThreads -
inactivityTimeout
private final long inactivityTimeout -
processedCount
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totalTimeTaken
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name
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threadGroup
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workerThreadClassLoader
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workersLock
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workers
List<ThreadPoolImpl.WorkerThread> workers
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Constructor Details
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ThreadPoolImpl
Create an unbounded thread pool in the current thread group with the current context ClassLoader as the worker thread default ClassLoader. -
ThreadPoolImpl
Create an unbounded thread pool in the given thread group with the current context ClassLoader as the worker thread default ClassLoader. -
ThreadPoolImpl
Create an unbounded thread pool in the given thread group with the given ClassLoader as the worker thread default ClassLoader. -
ThreadPoolImpl
Create a bounded thread pool in the current thread group with the current context ClassLoader as the worker thread default ClassLoader. -
ThreadPoolImpl
public ThreadPoolImpl(int minSize, int maxSize, long timeout, String threadpoolName, ClassLoader defaultClassLoader) Create a bounded thread pool in the current thread group with the given ClassLoader as the worker thread default ClassLoader.
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Method Details
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close
- Specified by:
close
in interfaceAutoCloseable
- Specified by:
close
in interfaceCloseable
- Throws:
IOException
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getDefaultClassLoader
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getAnyWorkQueue
Description copied from interface:ThreadPool
This method will return any instance of the WorkQueue. If the ThreadPool instance only services one WorkQueue then that WorkQueue instance will be returned. If there are more than one WorkQueues serviced by this ThreadPool, then this method would return a WorkQueue based on the implementation of the class that implements this interface. For PE 8.0 we would return a WorkQueue in a roundrobin fashion everytime this method is called. In the future we could allow pluggability of Policy objects for this.- Specified by:
getAnyWorkQueue
in interfaceThreadPool
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getWorkQueue
Description copied from interface:ThreadPool
This method will return an instance of the of the WorkQueue given a queueId. This will be useful in situations where there are more than one WorkQueues managed by the ThreadPool and the user of the ThreadPool wants to always use the same WorkQueue for doing the Work. If the number of WorkQueues in the ThreadPool are 10, then queueIds will go from 0-9- Specified by:
getWorkQueue
in interfaceThreadPool
- Throws:
NoSuchWorkQueueException
- thrown when queueId passed is invalid
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createWorkerThreadHelper
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createWorkerThread
void createWorkerThread()To be called from the WorkQueue to create worker threads when none available. -
minimumNumberOfThreads
public int minimumNumberOfThreads()Description copied from interface:ThreadPool
This method will return the minimum number of threads maintained by the threadpool.- Specified by:
minimumNumberOfThreads
in interfaceThreadPool
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maximumNumberOfThreads
public int maximumNumberOfThreads()Description copied from interface:ThreadPool
This method will return the maximum number of threads in the threadpool at any point in time, for the life of the threadpool- Specified by:
maximumNumberOfThreads
in interfaceThreadPool
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idleTimeoutForThreads
public long idleTimeoutForThreads()Description copied from interface:ThreadPool
This method will return the time in milliseconds when idle threads in the threadpool are removed.- Specified by:
idleTimeoutForThreads
in interfaceThreadPool
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currentNumberOfThreads
@ManagedAttribute @Description("The current number of threads") public int currentNumberOfThreads()Description copied from interface:ThreadPool
This method will return the current number of threads in the threadpool. This method returns a value which is not synchronized.- Specified by:
currentNumberOfThreads
in interfaceThreadPool
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decrementCurrentNumberOfThreads
void decrementCurrentNumberOfThreads() -
incrementCurrentNumberOfThreads
void incrementCurrentNumberOfThreads() -
numberOfAvailableThreads
@ManagedAttribute @Description("The number of available threads in this ThreadPool") public int numberOfAvailableThreads()Description copied from interface:ThreadPool
This method will return the number of available threads in the threadpool which are waiting for work. This method returns a value which is not synchronized.- Specified by:
numberOfAvailableThreads
in interfaceThreadPool
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numberOfBusyThreads
@ManagedAttribute @Description("The number of threads busy processing work in this ThreadPool") public int numberOfBusyThreads()Description copied from interface:ThreadPool
This method will return the number of busy threads in the threadpool This method returns a value which is not synchronized.- Specified by:
numberOfBusyThreads
in interfaceThreadPool
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averageWorkCompletionTime
@ManagedAttribute @Description("The average time needed to complete a work item") public long averageWorkCompletionTime()Description copied from interface:ThreadPool
This method returns the average elapsed time taken to complete a Work item.- Specified by:
averageWorkCompletionTime
in interfaceThreadPool
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currentProcessedCount
@ManagedAttribute @Description("The number of work items processed") public long currentProcessedCount()Description copied from interface:ThreadPool
This method returns the number of Work items processed by the threadpool- Specified by:
currentProcessedCount
in interfaceThreadPool
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getName
Description copied from interface:ThreadPool
This method will return the name of the threadpool.- Specified by:
getName
in interfaceThreadPool
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numberOfWorkQueues
public int numberOfWorkQueues()This method will return the number of WorkQueues serviced by the threadpool.- Specified by:
numberOfWorkQueues
in interfaceThreadPool
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getUniqueThreadId
private static int getUniqueThreadId() -
decrementNumberOfAvailableThreads
void decrementNumberOfAvailableThreads()This method will decrement the number of available threads in the threadpool which are waiting for work. Called from WorkQueueImpl.requestWork() -
incrementNumberOfAvailableThreads
void incrementNumberOfAvailableThreads()This method will increment the number of available threads in the threadpool which are waiting for work. Called from WorkQueueImpl.requestWork()
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