org.infinispan.atomic
Interface Delta

All Known Implementing Classes:

AtomicHashMapDelta, NullDelta

public interface Delta

Represents changes made to a DeltaAware implementation. Implementations should be efficiently Externalizable rather than just Serializable.

Since:

4.0

Author:

Manik Surtani

See Also:

DeltaAware

Method Summary

DeltaAware

merge(DeltaAware d) Merge the current Delta instance with a given DeltaAware instance, and return a coherent and complete DeltaAware instance.

Method Detail

merge

DeltaAware merge(DeltaAware d)

Merge the current Delta instance with a given DeltaAware instance, and return a coherent and complete DeltaAware instance. Implementations should be able to deal with null values passed in, or values of a different type from the expected DeltaAware instance. Usually the approach would be to ignore what is passed in, create a new instance of the DeltaAware implementation that the current Delta implementation is written for, apply changes and pass it back.

Parameters:

d - instance to merge with, or null if no merging is needed

Returns:

a fully coherent and usable instance of DeltaAware which may or may not be the same instance passed in