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## org.quartz.simpl
Class SimpleThreadPool

    java.lang.Object
      org.quartz.simpl.SimpleThreadPool

All Implemented Interfaces:
  ThreadPool

    public class SimpleThreadPool

extends Object
implements ThreadPool

This is class is a simple implementation of a thread pool, based on the ``ThreadPool`` interface.

`Runnable` objects are sent to the pool with the ``runInThread(Runnable)`` method, which blocks until a `Thread` becomes available.

The pool has a fixed number of `Thread`s, and does not grow or shrink based on demand.

Author:
  James House, Juergen Donnerstag

Constructor Summary
`SimpleThreadPool()` Create a new (unconfigured) `SimpleThreadPool`.
`SimpleThreadPool(int threadCount, int threadPriority)` Create a new `SimpleThreadPool` with the specified number of `Thread` s that have the given priority.

Method Summary
`int` | `blockForAvailableThreads()` Determines the number of threads that are currently available in in the pool.
`protected void` | `clearFromBusyWorkersList(org.quartz.simpl.SimpleThreadPool.WorkerThread wt)`
`protected List` | `createWorkerThreads(int count)`
`org.slf4j.Logger` | `getLog()`
`int` | `getPoolSize()` Get the current number of threads in the `ThreadPool`.
`int` | `getThreadCount()` Get the number of worker threads in the pool.
`String` | `getThreadNamePrefix()`
`int` | `getThreadPriority()` Get the thread priority of worker threads in the pool.
`void` | `initialize()` Must be called before the `ThreadPool` is used, in order to give the it a chance to initialize.
`boolean` | `isMakeThreadsDaemons()`
`boolean` | `isThreadsInheritContextClassLoaderOfInitializingThread()`
`boolean` | `isThreadsInheritGroupOfInitializingThread()`
`protected void` | `makeAvailable(org.quartz.simpl.SimpleThreadPool.WorkerThread wt)`
`boolean` | `runInThread(Runnable runnable)` Run the given `Runnable` object in the next available `Thread`.
`void` | `setInstanceId(String schedInstId)` Inform the `ThreadPool` of the Scheduler instance's Id, prior to initialize being invoked.
`void` | `setInstanceName(String schedName)` Inform the `ThreadPool` of the Scheduler instance's name, prior to initialize being invoked.
`void` | `setMakeThreadsDaemons(boolean makeThreadsDaemons)`
`void` | `setThreadCount(int count)` Set the number of worker threads in the pool - has no effect after `initialize()` has been called.
`void` | `setThreadNamePrefix(String prfx)`
`void` | `setThreadPriority(int prio)` Set the thread priority of worker threads in the pool - has no effect after `initialize()` has been called.
`void` | `setThreadsInheritContextClassLoaderOfInitializingThread(boolean inheritLoader)`
`void` | `setThreadsInheritGroupOfInitializingThread(boolean inheritGroup)`
`void` | `shutdown()` Terminate any worker threads in this thread group.
`void` | `shutdown(boolean waitForJobsToComplete)` Terminate any worker threads in this thread group.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### SimpleThreadPool

    public SimpleThreadPool()

  Create a new (unconfigured) `SimpleThreadPool`.

  See Also:
    `setThreadCount(int)`, `setThreadPriority(int)`

### SimpleThreadPool

    public SimpleThreadPool(int threadCount,
                            int threadPriority)

  Create a new `SimpleThreadPool` with the specified number of `Thread` s that have the given priority.

  Parameters:
    `threadCount` - the number of worker `Threads` in the pool, must be > 0.
    `threadPriority` - the thread priority for the worker threads.
  See Also:
    `Thread`

Method Detail

### getLog

    public org.slf4j.Logger getLog()

### getPoolSize

    public int getPoolSize()

  Description copied from interface: `ThreadPool`

  Get the current number of threads in the `ThreadPool`.

  Specified by:
    `getPoolSize` in interface `ThreadPool`

### setThreadCount

    public void setThreadCount(int count)

  Set the number of worker threads in the pool - has no effect after `initialize()` has been called.

### getThreadCount

    public int getThreadCount()

  Get the number of worker threads in the pool.

### setThreadPriority

    public void setThreadPriority(int prio)

  Set the thread priority of worker threads in the pool - has no effect after `initialize()` has been called.

### getThreadPriority

    public int getThreadPriority()

  Get the thread priority of worker threads in the pool.

### setThreadNamePrefix

    public void setThreadNamePrefix(String prfx)

### getThreadNamePrefix

    public String getThreadNamePrefix()

### isThreadsInheritContextClassLoaderOfInitializingThread

    public boolean isThreadsInheritContextClassLoaderOfInitializingThread()

  Returns:
    Returns the threadsInheritContextClassLoaderOfInitializingThread.

### setThreadsInheritContextClassLoaderOfInitializingThread

    public void setThreadsInheritContextClassLoaderOfInitializingThread(boolean inheritLoader)

  Parameters:
    `inheritLoader` - The threadsInheritContextClassLoaderOfInitializingThread to set.

### isThreadsInheritGroupOfInitializingThread

    public boolean isThreadsInheritGroupOfInitializingThread()

### setThreadsInheritGroupOfInitializingThread

    public void setThreadsInheritGroupOfInitializingThread(boolean inheritGroup)

### isMakeThreadsDaemons

    public boolean isMakeThreadsDaemons()

  Returns:
    Returns the value of makeThreadsDaemons.

### setMakeThreadsDaemons

    public void setMakeThreadsDaemons(boolean makeThreadsDaemons)

  Parameters:
    `makeThreadsDaemons` - The value of makeThreadsDaemons to set.

### setInstanceId

    public void setInstanceId(String schedInstId)

  Description copied from interface: `ThreadPool`

  Inform the `ThreadPool` of the Scheduler instance's Id, prior to initialize being invoked.

  Specified by:
    `setInstanceId` in interface `ThreadPool`

### setInstanceName

    public void setInstanceName(String schedName)

  Description copied from interface: `ThreadPool`

  Inform the `ThreadPool` of the Scheduler instance's name, prior to initialize being invoked.

  Specified by:
    `setInstanceName` in interface `ThreadPool`

### initialize

    public void initialize()
                    throws SchedulerConfigException

  Description copied from interface: `ThreadPool`

  Must be called before the `ThreadPool` is used, in order to give the it a chance to initialize.

  Typically called by the `SchedulerFactory`.

  Specified by:
    `initialize` in interface `ThreadPool`
  Throws:
    `SchedulerConfigException`

### createWorkerThreads

    protected List createWorkerThreads(int count)

### shutdown

    public void shutdown()

  Terminate any worker threads in this thread group.

  Jobs currently in progress will complete.

### shutdown

    public void shutdown(boolean waitForJobsToComplete)

  Terminate any worker threads in this thread group.

  Jobs currently in progress will complete.

  Specified by:
    `shutdown` in interface `ThreadPool`

### runInThread

    public boolean runInThread(Runnable runnable)

  Run the given `Runnable` object in the next available `Thread`. If while waiting the thread pool is asked to shut down, the Runnable is executed immediately within a new additional thread.

  Specified by:
    `runInThread` in interface `ThreadPool`
  Parameters:
    `runnable` - the `Runnable` to be added.
  Returns:
    true, if the runnable was assigned to run on a Thread.

### blockForAvailableThreads

    public int blockForAvailableThreads()

  Description copied from interface: `ThreadPool`

  Determines the number of threads that are currently available in in the pool. Useful for determining the number of times `runInThread(Runnable)` can be called before returning false.

  The implementation of this method should block until there is at least one available thread.

  Specified by:
    `blockForAvailableThreads` in interface `ThreadPool`
  Returns:
    the number of currently available threads

### makeAvailable

    protected void makeAvailable(org.quartz.simpl.SimpleThreadPool.WorkerThread wt)

### clearFromBusyWorkersList

    protected void clearFromBusyWorkersList(org.quartz.simpl.SimpleThreadPool.WorkerThread wt)

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