Is any performance difference between Getting value directly from distributed Cache and event.getValue() when CacheEventListener fire?

[jaga244]

sir,

     We are using infinispan 8.1.3 version.We have Two infinispan nodes.Both are communicating through distributed Cache event listeners.

Here, When Cache event listeners fire,

Can get value as follows methode

way1:

String value =event.getValue();

Cache cache=event.getCache();

cache.remove(event.getKey());//set flag as no return value

way2:

Cache cache=event.getCache();//obtain cache from event

String value = cache.remove(event.getKey());//set flag as return value

way3:

Cache cache=getCacheLocalSystem();

String value = cache.remove(event.getKey());//set flag as return value

what is best way from performance point of view from above??

thanks

[william.burns]

It depends, but if the listener is fired on the primary owner then there is no difference.

If however you are using clustered listeners or aren't using the primaryOnly setting on the listener then the first would be the most perfomant given that you don't have to serialize the value as a response a second time, for no owner nodes. However you have to be careful with modifying the cache inside a listener. As mentioned at Listener (Infinispan JavaDoc All 9.4.0.Final API)  the event is notified while holding the lock to the entry and thus you can delay or possibly deadlock operations by doing so. You can set your listener to not be sync or use your own thread pool to avoid this issue if it is a problem.

[jaga244]

thanks for reply sir