Interface ReadOnlyCacheEntryProcessor<K,V,R>

Type Parameters:

K - the type of the key

V - the type of the value

R - the type of the result returned by the processor

All Superinterfaces:

CacheEntryProcessor<K,V,R>

public interface ReadOnlyCacheEntryProcessor<K,V,R>
extends CacheEntryProcessor<K,V,R>

Cache entry processor that signals read-only intent.

ReadOnlyCacheEntryProcessor implementations do not modify the entry they process. The EntryProcessorExecutor optimizes for read-only processors by skipping expensive lock acquisition and providing a read-only view of the entry.

Attempting to call setValue or remove on the read-only entry will throw UnsupportedOperationException.

Usage:

  ReadOnlyCacheEntryProcessorinvalid input: '<'String, Integer, Integer> reader = entry -> {
      return entry.value();
  };
  Integer result = map.processEntry("key", reader);

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	ReadOnlyCacheEntryProcessor.ReadOnlyEntry<K,V>	Readonly marker interface for entries processed by read-only processors.

Nested classes/interfaces inherited from interface CacheEntryProcessor

CacheEntryProcessor.Entry<K,V>

Method Summary

Modifier and Type	Method	Description
R	process(CacheEntryProcessor.Entry<K,V> entry)	Process the given read-only entry.

Method Details

process

R process(CacheEntryProcessor.Entry<K,V> entry)

Process the given read-only entry.

Implementations must not attempt to call setValue or remove on the entry.

Specified by:

process in interface CacheEntryProcessor<K,V,R>

Parameters:

entry - the read-only entry to process (must not be null)

Returns:

the result of processing

Throws:

UnsupportedOperationException - if setValue or remove is called