org.springframework.data.gemfire

Interface GemfireCallback<T>

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface GemfireCallback<T>

Callback interface for GemFire code. Implementations of this interface are to be used with GemfireTemplate's execution methods, often as anonymous classes within a method implementation. A typical implementation will call Region.get/put/query to perform some operations on stored objects.

Author:

Costin Leau, John Blum

See Also:

Region

Method Summary

Modifier and Type	Method and Description
T	doInGemfire(org.apache.geode.cache.Region<?,?> region) This methods gets called by GemfireTemplate.execute(GemfireCallback).

Method Detail

doInGemfire

T doInGemfire(org.apache.geode.cache.Region<?,?> region)
       throws org.apache.geode.GemFireCheckedException,
              org.apache.geode.GemFireException

This methods gets called by GemfireTemplate.execute(GemfireCallback). The method implementation does not need to care about handling transactions or exceptions. Allows a result Object created within this callback to be returned, i.e. an application domain object or a collection of application domain objects. A custom thrown RuntimeException is treated as an application exception; the exception is propagated to the caller of the template.

Parameters:

region - Region on which the operation of this callback will be performed.

Returns:

a result Object, or null if no result.

Throws:

org.apache.geode.GemFireCheckedException - for checked Exceptions occurring in GemFire.

org.apache.geode.GemFireException - for RuntimeExceptions occurring in GemFire.

See Also:

GemfireTemplate, Region