Package com.espertech.esper.runtime.internal.kernel.updatedispatch

Class UpdateDispatchFutureSpin

java.lang.Object

com.espertech.esper.runtime.internal.kernel.updatedispatch.UpdateDispatchFutureSpin

All Implemented Interfaces:

com.espertech.esper.common.internal.statement.dispatch.Dispatchable

public class UpdateDispatchFutureSpin
extends Object
implements com.espertech.esper.common.internal.statement.dispatch.Dispatchable

UpdateDispatchFutureSpin can be added to a dispatch queue that is thread-local. It represents is a stand-in for a future dispatching of a statement result to statement listeners.

UpdateDispatchFutureSpin is aware of future and past dispatches: (newest) DF3 <--> DF2 <--> DF1 (oldest), and uses a spin lock to block if required

Constructor Summary

Constructors

Constructor	Description
UpdateDispatchFutureSpin(com.espertech.esper.common.internal.schedule.TimeSourceService timeSourceService)	Ctor - use for the first future to indicate completion.
UpdateDispatchFutureSpin(UpdateDispatchViewBlockingSpin view, UpdateDispatchFutureSpin earlier, long msecTimeout, com.espertech.esper.common.internal.schedule.TimeSourceService timeSourceService)	Ctor.

Method Summary

Modifier and Type	Method	Description
void	cancelled()
void	execute()
com.espertech.esper.common.internal.statement.dispatch.UpdateDispatchView	getView()
boolean	isCompleted()	Returns true if the dispatch completed for this future.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

UpdateDispatchFutureSpin

public UpdateDispatchFutureSpin(UpdateDispatchViewBlockingSpin view,
 UpdateDispatchFutureSpin earlier,
 long msecTimeout,
 com.espertech.esper.common.internal.schedule.TimeSourceService timeSourceService)

Ctor.

Parameters:

view - is the blocking dispatch view through which to execute a dispatch

earlier - is the older future

msecTimeout - is the timeout period to wait for listeners to complete a prior dispatch

timeSourceService - time source provider

UpdateDispatchFutureSpin

public UpdateDispatchFutureSpin(com.espertech.esper.common.internal.schedule.TimeSourceService timeSourceService)

Ctor - use for the first future to indicate completion.

Parameters:

timeSourceService - time source provider

Method Details

isCompleted

public boolean isCompleted()

Returns true if the dispatch completed for this future.

Returns:

true for completed, false if not

execute

public void execute()

Specified by:

execute in interface com.espertech.esper.common.internal.statement.dispatch.Dispatchable

getView

public com.espertech.esper.common.internal.statement.dispatch.UpdateDispatchView getView()

Specified by:

getView in interface com.espertech.esper.common.internal.statement.dispatch.Dispatchable

cancelled

public void cancelled()

Specified by:

cancelled in interface com.espertech.esper.common.internal.statement.dispatch.Dispatchable