org.infinispan.atomic
Interface Delta

All Superinterfaces:

Externalizable, Serializable

All Known Implementing Classes:

AtomicHashMapDelta, NullDelta

public interface Delta
extends Externalizable

Represents changes made to a DeltaAware implementation. Should be efficiently externalizable.

Since:

4.0

Author:

Manik Surtani (manik AT jboss DOT org)

Method Summary

DeltaAware

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

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Method Detail

merge

DeltaAware merge(DeltaAware d)

Merge the current set of deltas 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