org.apache.geode.cache.execute

Interface RegionFunctionContext<T>

All Superinterfaces:

FunctionContext<T>

public interface RegionFunctionContext<T>
extends FunctionContext<T>

Defines the execution context of a data dependent Function. Applications can use the methods provided to retrieve the Region and context specific routing objects. When the function is executed using FunctionService.onRegion(Region), the FunctionContext can be typecast to this type.

If the region is a partitioned region, PartitionRegionHelper can be used to get local and colocated data references.

Since:

GemFire 6.0

See Also:

FunctionContext, PartitionRegionHelper

Method Summary

Modifier and Type	Method and Description
<K,V> Region<K,V>	getDataSet() Returns the reference to the Region on which the function is executed
Set<?>	getFilter() Returns subset of keys (filter) provided by the invoking thread (aka routing objects).

Methods inherited from interface org.apache.geode.cache.execute.FunctionContext

getArguments, getCache, getFunctionId, getMemberName, getPrincipal, getResultSender, isPossibleDuplicate

Method Detail

getFilter

Set<?> getFilter()

Returns subset of keys (filter) provided by the invoking thread (aka routing objects). The set of filter keys are locally present in the datastore on the executing cluster member.

Returns:

the objects that caused the function to be routed to this cluster member

Since:

GemFire 6.0

See Also:

Execution.withFilter(Set)

getDataSet

<K,V> Region<K,V> getDataSet()

Returns the reference to the Region on which the function is executed

Type Parameters:

K - the key type for the Region

V - the value type for the Region

Returns:

returns the Region on which the function is executed

Since:

GemFire 6.0

See Also:

FunctionService.onRegion(Region)