An application plug-in that can be installed on a region. Listener change notifications are invoked after the change has occured.

Namespace: GemStone.GemFire.Cache
Assembly:  GemStone.GemFire.Cache (in GemStone.GemFire.Cache.dll)


public interface ICacheListener
Visual Basic (Declaration)
Public Interface ICacheListener
Visual C++
public interface class ICacheListener


Listeners receive notifications when entries in a region change or changes occur to the region attributes themselves.

A cache listener is defined in the RegionAttributes.

The methods on a ICacheListener are invoked asynchronously. Multiple events can cause concurrent invocation of ICacheListener methods. If event A occurs before event B, there is no guarantee that their corresponding ICacheListener method invocations will occur in the same order. Any exceptions thrown by the listener are caught by GemFire and logged. Listeners are user callbacks that are invoked by GemFire. It is important to ensure that minimal work is done in the listener before returning control back to GemFire. For example, a listener implementation may choose to hand off the event to a thread pool that then processes the event on its thread rather than the listener thread

See Also