Package com.hazelcast.cache

Interface BackupAwareEntryProcessor<K,V,T>

Type Parameters:
K - the type of keys maintained by this cache
V - the type of cached values
T - the type of the return value
All Superinterfaces:
javax.cache.processor.EntryProcessor<K,V,T>
public interface BackupAwareEntryProcessor<K,V,T> extends javax.cache.processor.EntryProcessor<K,V,T>
An invocable function that allows applications to perform compound operations on a Cache.Entry atomically, according to the defined consistency of a Cache.

The difference from the normal EntryProcessor implementations, where a backup is done sending the completely changed resulting object to the backup-partition, is that implementations of this sub-interface can create additional EntryProcessor instances that are sent to the backup partitions to apply logic which is either different from the owner partition (e.g. not sending emails) or is the simple case of being similar to the main operations. In the later case createBackupEntryProcessor() can also return 

this
.
Since:
3.4
See Also:
  • EntryProcessor

  • Method Summary

    Modifier and Type
    Method
    Description
    javax.cache.processor.EntryProcessor<K,V,T>
    createBackupEntryProcessor()
    Either creates a new, specialized EntryProcessor to be executed on the backup-partition, or returns

    Methods inherited from interface javax.cache.processor.EntryProcessor

    process

  • Method Details

    • createBackupEntryProcessor

      javax.cache.processor.EntryProcessor<K,V,T> createBackupEntryProcessor()
      Either creates a new, specialized EntryProcessor to be executed on the backup-partition, or returns 
      this
      to execute the same processor remotely.

      If null is returned, the value is backed up using the normal value backup mechanism, no exception is thrown, and the update is applied as expected.

      Returns:
      the backup-partition EntryProcessor