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## org.apache.catalina.core
Class StandardThreadExecutor

    java.lang.Object
      org.apache.catalina.util.LifecycleBase
          org.apache.catalina.util.LifecycleMBeanBase
              org.apache.catalina.core.StandardThreadExecutor

All Implemented Interfaces:
  Executor, MBeanRegistration, Lifecycle, ResizableExecutor

    public class StandardThreadExecutor

extends LifecycleMBeanBase
implements Executor, ResizableExecutor

Field Summary
`protected boolean` | `daemon` Run threads in daemon or non-daemon state
`protected ThreadPoolExecutor` | `executor` The executor we use for this component
`protected int` | `maxIdleTime` idle time in milliseconds
`protected int` | `maxQueueSize` The maximum number of elements that can queue up before we reject them
`protected int` | `maxThreads` max number of threads
`protected int` | `minSpareThreads` min number of threads
`protected String` | `name` the name of this thread pool
`protected String` | `namePrefix` Default name prefix for the thread name
`protected boolean` | `prestartminSpareThreads` prestart threads?
`protected int` | `threadPriority` Default thread priority
`protected long` | `threadRenewalDelay` After a context is stopped, threads in the pool are renewed.

Fields inherited from class org.apache.catalina.util.LifecycleMBeanBase
`mserver`

Fields inherited from interface org.apache.catalina.Lifecycle
`AFTER_DESTROY_EVENT, AFTER_INIT_EVENT, AFTER_START_EVENT, AFTER_STOP_EVENT, BEFORE_DESTROY_EVENT, BEFORE_INIT_EVENT, BEFORE_START_EVENT, BEFORE_STOP_EVENT, CONFIGURE_START_EVENT, CONFIGURE_STOP_EVENT, PERIODIC_EVENT, START_EVENT, STOP_EVENT`

Constructor Summary
`StandardThreadExecutor()`

Method Summary
`void` | `contextStopping()`
`protected void` | `destroyInternal()` Sub-classes wishing to perform additional clean-up should override this method, ensuring that super.destroyInternal() is the last call in the overriding method.
`void` | `execute(Runnable command)`
`void` | `execute(Runnable command, long timeout, TimeUnit unit)` Executes the given command at some time in the future.
`int` | `getActiveCount()` Returns the approximate number of threads that are actively executing tasks.
`long` | `getCompletedTaskCount()`
`int` | `getCorePoolSize()`
`protected String` | `getDomainInternal()` Method implemented by sub-classes to identify the domain in which MBeans should be registered.
`int` | `getLargestPoolSize()`
`int` | `getMaxIdleTime()`
`int` | `getMaxQueueSize()`
`int` | `getMaxThreads()`
`int` | `getMinSpareThreads()`
`String` | `getName()`
`String` | `getNamePrefix()`
`protected String` | `getObjectNameKeyProperties()` Allow sub-classes to specify the key properties component of the `ObjectName` that will be used to register this component.
`int` | `getPoolSize()` Returns the current number of threads in the pool.
`int` | `getQueueSize()`
`int` | `getThreadPriority()`
`long` | `getThreadRenewalDelay()`
`protected void` | `initInternal()` Sub-classes wishing to perform additional initialization should override this method, ensuring that super.initInternal() is the first call in the overriding method.
`boolean` | `isDaemon()`
`boolean` | `isPrestartminSpareThreads()`
`boolean` | `resizePool(int corePoolSize, int maximumPoolSize)`
`boolean` | `resizeQueue(int capacity)`
`void` | `setDaemon(boolean daemon)`
`void` | `setMaxIdleTime(int maxIdleTime)`
`void` | `setMaxQueueSize(int size)`
`void` | `setMaxThreads(int maxThreads)`
`void` | `setMinSpareThreads(int minSpareThreads)`
`void` | `setName(String name)`
`void` | `setNamePrefix(String namePrefix)`
`void` | `setPrestartminSpareThreads(boolean prestartminSpareThreads)`
`void` | `setThreadPriority(int threadPriority)`
`void` | `setThreadRenewalDelay(long threadRenewalDelay)`
`protected void` | `startInternal()` Start the component and implement the requirements of `LifecycleBase.startInternal()`.
`protected void` | `stopInternal()` Stop the component and implement the requirements of `LifecycleBase.stopInternal()`.

Methods inherited from class org.apache.catalina.util.LifecycleMBeanBase
`getDomain, getObjectName, postDeregister, postRegister, preDeregister, preRegister, register, setDomain, unregister`

Methods inherited from class org.apache.catalina.util.LifecycleBase
`addLifecycleListener, destroy, findLifecycleListeners, fireLifecycleEvent, getState, getStateName, init, removeLifecycleListener, setState, setState, start, stop`

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

Methods inherited from interface org.apache.catalina.Lifecycle
`addLifecycleListener, destroy, findLifecycleListeners, getState, getStateName, init, removeLifecycleListener, start, stop`

Field Detail

### threadPriority

    protected int threadPriority

  Default thread priority

### daemon

    protected boolean daemon

  Run threads in daemon or non-daemon state

### namePrefix

    protected String namePrefix

  Default name prefix for the thread name

### maxThreads

    protected int maxThreads

  max number of threads

### minSpareThreads

    protected int minSpareThreads

  min number of threads

### maxIdleTime

    protected int maxIdleTime

  idle time in milliseconds

### executor

    protected ThreadPoolExecutor executor

  The executor we use for this component

### name

    protected String name

  the name of this thread pool

### prestartminSpareThreads

    protected boolean prestartminSpareThreads

  prestart threads?

### maxQueueSize

    protected int maxQueueSize

  The maximum number of elements that can queue up before we reject them

### threadRenewalDelay

    protected long threadRenewalDelay

  After a context is stopped, threads in the pool are renewed. To avoid renewing all threads at the same time, this delay is observed between 2 threads being renewed.

Constructor Detail

### StandardThreadExecutor

    public StandardThreadExecutor()

Method Detail

### initInternal

    protected void initInternal()
                         throws LifecycleException

  Description copied from class: `LifecycleMBeanBase`
  Sub-classes wishing to perform additional initialization should override this method, ensuring that super.initInternal() is the first call in the overriding method.

  Overrides:
    `initInternal` in class `LifecycleMBeanBase`
  Throws:
    `LifecycleException`

### startInternal

    protected void startInternal()
                          throws LifecycleException

  Start the component and implement the requirements of `LifecycleBase.startInternal()`.

  Specified by:
    `startInternal` in class `LifecycleBase`
  Throws:
    `LifecycleException` - if this component detects a fatal error that prevents this component from being used

### stopInternal

    protected void stopInternal()
                         throws LifecycleException

  Stop the component and implement the requirements of `LifecycleBase.stopInternal()`.

  Specified by:
    `stopInternal` in class `LifecycleBase`
  Throws:
    `LifecycleException` - if this component detects a fatal error that needs to be reported

### destroyInternal

    protected void destroyInternal()
                            throws LifecycleException

  Description copied from class: `LifecycleMBeanBase`
  Sub-classes wishing to perform additional clean-up should override this method, ensuring that super.destroyInternal() is the last call in the overriding method.

  Overrides:
    `destroyInternal` in class `LifecycleMBeanBase`
  Throws:
    `LifecycleException`

### execute

    public void execute(Runnable command,
                        long timeout,
                        TimeUnit unit)

  Description copied from interface: `Executor`
  Executes the given command at some time in the future. The command may execute in a new thread, in a pooled thread, or in the calling thread, at the discretion of the `Executor` implementation. If no threads are available, it will be added to the work queue. If the work queue is full, the system will wait for the specified time until it throws a RejectedExecutionException

  Parameters:
    `command` - the runnable task

### execute

    public void execute(Runnable command)

  Specified by:
    `execute` in interface `Executor`

### contextStopping

    public void contextStopping()

### getThreadPriority

    public int getThreadPriority()

### isDaemon

    public boolean isDaemon()

### getNamePrefix

    public String getNamePrefix()

### getMaxIdleTime

    public int getMaxIdleTime()

### getMaxThreads

    public int getMaxThreads()

  Specified by:
    `getMaxThreads` in interface `ResizableExecutor`

### getMinSpareThreads

    public int getMinSpareThreads()

### getName

    public String getName()

### isPrestartminSpareThreads

    public boolean isPrestartminSpareThreads()

### setThreadPriority

    public void setThreadPriority(int threadPriority)

### setDaemon

    public void setDaemon(boolean daemon)

### setNamePrefix

    public void setNamePrefix(String namePrefix)

### setMaxIdleTime

    public void setMaxIdleTime(int maxIdleTime)

### setMaxThreads

    public void setMaxThreads(int maxThreads)

### setMinSpareThreads

    public void setMinSpareThreads(int minSpareThreads)

### setPrestartminSpareThreads

    public void setPrestartminSpareThreads(boolean prestartminSpareThreads)

### setName

    public void setName(String name)

### setMaxQueueSize

    public void setMaxQueueSize(int size)

### getMaxQueueSize

    public int getMaxQueueSize()

### getThreadRenewalDelay

    public long getThreadRenewalDelay()

### setThreadRenewalDelay

    public void setThreadRenewalDelay(long threadRenewalDelay)

### getActiveCount

    public int getActiveCount()

  Description copied from interface: `ResizableExecutor`
  Returns the approximate number of threads that are actively executing tasks.

  Specified by:
    `getActiveCount` in interface `ResizableExecutor`
  Returns:
    the number of threads

### getCompletedTaskCount

    public long getCompletedTaskCount()

### getCorePoolSize

    public int getCorePoolSize()

### getLargestPoolSize

    public int getLargestPoolSize()

### getPoolSize

    public int getPoolSize()

  Description copied from interface: `ResizableExecutor`
  Returns the current number of threads in the pool.

  Specified by:
    `getPoolSize` in interface `ResizableExecutor`
  Returns:
    the number of threads

### getQueueSize

    public int getQueueSize()

### resizePool

    public boolean resizePool(int corePoolSize,
                              int maximumPoolSize)

  Specified by:
    `resizePool` in interface `ResizableExecutor`

### resizeQueue

    public boolean resizeQueue(int capacity)

  Specified by:
    `resizeQueue` in interface `ResizableExecutor`

### getDomainInternal

    protected String getDomainInternal()

  Description copied from class: `LifecycleMBeanBase`
  Method implemented by sub-classes to identify the domain in which MBeans should be registered.

  Specified by:
    `getDomainInternal` in class `LifecycleMBeanBase`
  Returns:
    The name of the domain to use to register MBeans.

### getObjectNameKeyProperties

    protected String getObjectNameKeyProperties()

  Description copied from class: `LifecycleMBeanBase`
  Allow sub-classes to specify the key properties component of the `ObjectName` that will be used to register this component.

  Specified by:
    `getObjectNameKeyProperties` in class `LifecycleMBeanBase`
  Returns:
    The string representation of the key properties component of the desired `ObjectName`

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