org.elasticsearch.cluster

Interface MergableCustomMetaData<T extends MetaData.Custom>

Type Parameters:

T - type of custom meta data

public interface MergableCustomMetaData<T extends MetaData.Custom>

Interface to allow merging MetaData.Custom. When multiple Mergable Custom metadata of the same type are found (from underlying clusters), the Custom metadata can be merged using merge(MetaData.Custom).

Method Summary

Modifier and Type	Method and Description
T	merge(T other) Merges this custom metadata with other, returning either this or other custom metadata.

Method Detail

merge

T merge(T other)

Merges this custom metadata with other, returning either this or other custom metadata. This method should not mutate either this or the other custom metadata.

Parameters:

other - custom meta data

Returns:

the same instance or other custom metadata based on implementation if both the instances are considered equal, implementations should return this instance to avoid redundant cluster state changes.