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com.tangosol.net.partition
Interface KeyAssociator

All Known Implementing Classes:

DefaultKeyAssociator

public interface KeyAssociator

A KeyAssociator provides key associations on behalf of a set of keys. The information provided by a KeyAssociator will be used to place all associated keys into the same partition. Custom KeyAssociator implementations should not allow circular associations.

See KeyAssociatedFilter for an example of a distributed query that takes advantage of a custom KeyAssociator implementation to dramatically optimize its performance.

Since:

Coherence 3.0

Method Summary

java.lang.Object	getAssociatedKey(java.lang.Object oKey) Determine the key object to which the specified key object is associated.
void	init(PartitionedService service) Initialize the KeyAssociator and bind it to a PartitionedService.

Method Detail

init

void init(PartitionedService service)

Initialize the KeyAssociator and bind it to a PartitionedService.

Parameters:

service - the PartitionedService that this associator is being bound to

getAssociatedKey

java.lang.Object getAssociatedKey(java.lang.Object oKey)

Determine the key object to which the specified key object is associated.

Note: Circular associations are not permitted.

Parameters:

oKey - the key to get an association for

Returns:

the key object that is associated with the specified key, or null if the specified key has no association

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