Access and update values in replicated Cache

I'm on the underside of test in a single node with the use of the replicated cache

(1) store a Test object in the cache of key = 1
(2) get twice the 1 button and assign to two variables such as recovery and two Extraction.
(3) update the recovery of two
(4) the recovery of two update has been applied to research a too
DefaultCacheServer.start();

NamedCache cache = CacheFactory.getCache("Test");

// Store the value in to the replicated cache with Num = 1         
TestObject obj = new TestObject();
obj.setNum(1);
cache.put(1, obj);
         
// Retrieve the same value twice for the Key = 1
TestObject retrievalOne = (TestObject)cache.get(1);
TestObject retrievalTwo = (TestObject)cache.get(1);

// Print the value for the Retrieval One        
System.out.println("Retrieval One (before Retrieval One updated) : "+ retrievalOne.getNum());
         
// Updating the retrieval Two
retrievalTwo.setNum(2);

// Print the value for the Retrieval One again        
System.out.println("Retrieval One (after Retrieval One updated) : "+ retrievalOne.getNum());
Output
Retrieval One (after Retrieval One updated) : 1
Retrieval One (after Retrieval One updated) : 2
So in the above code I did cache.put to update the cache of coherence, but update the two recovery locally made cache and recoveryemphasis.

Is it possible to prevent changes to the object become visible before the cache.put (updatedObject) on the same node (while using a cache without cloning objects and replicated locally).

my config of cache:
<replicated-scheme>
     <scheme-name>data</scheme-name>
     <service-name>Cache_for_data</service-name>
     <serializer>
          <class-name>
               com.tangosol.io.pof.ConfigurablePofContext
          </class-name>
          <init-params>
               <init-param>
                    <param-type>string</param-type>
                    <param-value>pof-config.xml</param-value>
               </init-param>
          </init-params>
     </serializer>     
     <lease-granularity>thread</lease-granularity>
     <thread-count>10</thread-count>
     <backing-map-scheme>
          <local-scheme />
     </backing-map-scheme>
     <autostart>true</autostart>
</replicated-scheme>

Hi Eric,.

the replicated cache maintains the Java objects and returns them as they are, until a code changes the cache entry.

What you see is the result of retrievalOne and retrievalTwo is the same object, if there is no change after the first call to the get() method.

In addition, it is not only your thread may have a reference to this object but the other wires in the same JVM, too.

This is why the objects returned by a replicated cache, near cache or local cache are not safe to be changed, you should put new objects in the cache of the key even with cache.put ().

Best regards

Robert

Tags: Fusion Middleware

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