com.hazelcast.spi

Interface SplitBrainAwareDataContainer<K,V,T>

Type Parameters:

K - the type of the record key

V - the type of the record value

T - the type of the merged item

public interface SplitBrainAwareDataContainer<K,V,T>

Interface for split-brain capable data containers of services, which implement SplitBrainHandlerService.

Since:

3.10

Method Summary

Modifier and Type	Method and Description
T	merge(SplitBrainMergeEntryView<K,V> mergingEntry, SplitBrainMergePolicy mergePolicy) Merges the given SplitBrainMergeEntryView with an existing entry via the supplied SplitBrainMergePolicy.

Method Detail

merge

T merge(SplitBrainMergeEntryView<K,V> mergingEntry,
        SplitBrainMergePolicy mergePolicy)

Merges the given SplitBrainMergeEntryView with an existing entry via the supplied SplitBrainMergePolicy.

The existing entry has to be retrieved by the implementing data container, via the key or value of the merging entry. Both entries are passed to SplitBrainMergePolicy.merge(SplitBrainMergeEntryView, SplitBrainMergeEntryView), which decides if one of the entries should be merged.

The return type of this methods depends on the contract between the calling merge operation and the data container, e.g.

• the merged entry instance in the data container specific format, to create a backup operation
• null to signal that nothing has been merged
• boolean to signal if the mergingEntry was merged or not

Parameters:

mergingEntry - the SplitBrainMergeEntryView instance that wraps key/value for merging and existing entry

mergePolicy - the SplitBrainMergePolicy instance for handling merge policy

Returns:

the internal item representation to create a backup operation if merge was applied, otherwise null