Apache Derby Database Engine and Embedded JDBC Driver 10.17.1.0 · org.apache.derby.impl.services.timer.SingletonTimerFactory

Modifier and Type	Field and Description
private final AtomicInteger	cancelCount The number of times `cancel(TimerTask)` has been called.
private final Timer	singletonTimer Singleton Timer instance.
private StringBuilder	warnings Initialization warnings.

Access	Constructor and Description
public	SingletonTimerFactory() Initializes this TimerFactory with a singleton Timer instance.

Method Summary

Modifier and Type	Method and Description
public void	boot(boolean not used create, Properties not used properties) Implements org.apache.derby.iapi.services.monitor.ModuleControl.boot. Currently does nothing, singleton Timer instance is initialized in the constructor.
public void	cancel(TimerTask the task to cancel task) Implements org.apache.derby.iapi.services.timer.TimerFactory.cancel. Cancel a task.
private ClassLoader	Returns: the context class loader of the current thread if it is not the same class loader as the one used by the system classes or the Derby classes and we have permission to read the class loaders, or `null` otherwise getContextClassLoader() Check if the current context class loader could cause a memory leak (DERBY-3745) if it is inherited by the timer thread, and return it if that is the case.
public String	Returns: See legend getWarnings() Return any warnings generated during the initialization of this class, or null if none
public void	schedule(TimerTask the task to schedule task, long how many milliseconds to wait before executing the task delay) Implements org.apache.derby.iapi.services.timer.TimerFactory.schedule. Schedule a task.
private void	setContextClassLoader(final ClassLoader cl)
public void	stop() Implements org.apache.derby.iapi.services.monitor.ModuleControl.stop. Cancels the singleton Timer instance.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

cancelCount	back to summary
private final AtomicInteger cancelCount The number of times `cancel(TimerTask)` has been called. Used for determining whether it's time to purge cancelled tasks from the timer.

singletonTimer	back to summary
private final Timer singletonTimer Singleton Timer instance.

warnings	back to summary
private StringBuilder warnings Initialization warnings. See `getWarnings`.

Constructor Detail

SingletonTimerFactory	back to summary
public SingletonTimerFactory() Initializes this TimerFactory with a singleton Timer instance.

Method Detail

boot back to summary

boot	back to summary
public void boot(boolean create, Properties properties) throws StandardException Implements org.apache.derby.iapi.services.monitor.ModuleControl.boot. Currently does nothing, singleton Timer instance is initialized in the constructor. Implements the ModuleControl interface. Parameters create:boolean not used properties:Properties not used Annotations @Override Exceptions StandardException: not used See Also `ModuleControl`

public void boot(boolean create, Properties properties) throws StandardException

Implements org.apache.derby.iapi.services.monitor.ModuleControl.boot.

Currently does nothing, singleton Timer instance is initialized in the constructor. Implements the ModuleControl interface.

Parameters

create:boolean: not used
properties:Properties: not used

Annotations

@Override

Exceptions

StandardException:: not used

See Also

ModuleControl

cancel	back to summary
public void cancel(TimerTask task) Implements org.apache.derby.iapi.services.timer.TimerFactory.cancel. Doc from org.apache.derby.iapi.services.timer.TimerFactory.cancel. Cancel a task. Parameters task:TimerTask the task to cancel Annotations @Override

cancel

back to summary

public void cancel(TimerTask task)

Implements org.apache.derby.iapi.services.timer.TimerFactory.cancel.

Doc from org.apache.derby.iapi.services.timer.TimerFactory.cancel.

Cancel a task.

Parameters

task:TimerTask: the task to cancel

Annotations

@Override

getContextClassLoader back to summary

getContextClassLoader	back to summary
private ClassLoader getContextClassLoader() Check if the current context class loader could cause a memory leak (DERBY-3745) if it is inherited by the timer thread, and return it if that is the case. Returns:ClassLoader the context class loader of the current thread if it is not the same class loader as the one used by the system classes or the Derby classes and we have permission to read the class loaders, or `null` otherwise

private ClassLoader getContextClassLoader()

Check if the current context class loader could cause a memory leak (DERBY-3745) if it is inherited by the timer thread, and return it if that is the case.

Returns:ClassLoader: the context class loader of the current thread if it is not the same class loader as the one used by the system classes or the Derby classes and we have permission to read the class loaders, or null otherwise

getWarnings	back to summary
public String getWarnings() Return any warnings generated during the initialization of this class, or null if none Returns:String See legend

getWarnings

back to summary

public String getWarnings()

Return any warnings generated during the initialization of this class, or null if none

Returns:String: See legend

schedule	back to summary
public void schedule(TimerTask task, long delay) Implements org.apache.derby.iapi.services.timer.TimerFactory.schedule. Doc from org.apache.derby.iapi.services.timer.TimerFactory.schedule. Schedule a task. Parameters task:TimerTask the task to schedule delay:long how many milliseconds to wait before executing the task Annotations @Override

schedule

back to summary

public void schedule(TimerTask task, long delay)

Implements org.apache.derby.iapi.services.timer.TimerFactory.schedule.

Doc from org.apache.derby.iapi.services.timer.TimerFactory.schedule.

Schedule a task.

Parameters

task:TimerTask: the task to schedule
delay:long: how many milliseconds to wait before executing the task

Annotations

@Override

setContextClassLoader	back to summary
private void setContextClassLoader(final ClassLoader cl)

stop back to summary

stop	back to summary
public void stop() Implements org.apache.derby.iapi.services.monitor.ModuleControl.stop. Cancels the singleton Timer instance. Implements the ModuleControl interface. Annotations @Override See Also `ModuleControl`

public void stop()

Implements org.apache.derby.iapi.services.monitor.ModuleControl.stop.

Cancels the singleton Timer instance. Implements the ModuleControl interface.

Annotations

@Override

See Also

ModuleControl

public Class SingletonTimerFactory

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail