cacheEntryModifiedEvent isPre (false) problem

[jcmorgan08]

Hi,

I have a replicated inmem cache and I'm trying to call a method when a value is updated in the cache, however, I only get null values. The problem is illustrated with this code:

        @CacheEntryModified

        public void cacheEntryModified(final CacheEntryModifiedEvent e) {

            System.out.println("Mod a entry to cache... pre = " + e.isPre() + " local = " + e.isOriginLocal() + " key = " +                                 e.getKey().toString());

            if (!e.isPre()) {

                Cache c = e.getCache();

                System.out.println(c.getName());

                showCurrentValue(e, c);

                System.out.println("mod value(2) = "+e.getValue());

                showCurrentValue(e, c);

            }

        }

        private void showCurrentValue(final CacheEntryModifiedEvent e, Cache c) {

            Object o = c.get(e.getKey().toString());

            if (o != null)

                System.out.println("mod value = " + o.toString());

            else

                System.out.println("mod value = NULL");

        }

When the key "hello" is updated to value "www" I get this output:

Mod a entry to cache... pre = false local = true key = hello

replicatedInmem

mod value = NULL

mod value(2) = www

mod value = NULL

Now, that's all well and good, I can get the new value by calling "e.getValue()" - but I was expecting, since this is a post event, to be able to get the value by querying the cache. As a "post modification" event, shouldn't that be the case?

[jcmorgan08]

I should also mention that the behaviour was as expected when using a persisted db but I get the above behaviour when using a purely in memory db, and also that if I wait for a short period and then examine the cache value, the value will (by then) have updated correctly.

[galder.zamarreno]

Hmmm, did you add a sync = false to @Listener annotation? If so, try without sync or set it to true.

What version of Infinispan do you use?

[jcmorgan08]

I did try sync = false. It wasn't successful!

I was using the latest stable InfiniSpan (4.2.0 FINAL)

The workaround for me is to use "getValue()" and to pass that value to methods that I call from within the cacheEntryModified method, rather than calling cache.get(...). Thanks for the reply though.

[manik]

You should be using getValue() rather than Cache.get().

[jcmorgan08]

Manik, thanks. That's fine and I can work around the implementation for now, however it is somewhat unsatisfactory if I wish to call standard methods that read the cache "after" the modification event. I'll mark this as answered, but an event that gets called after the update has been done (and is in the cache) would be useful. cheers, Jon

[galder.zamarreno]

I added an FAQ entry to http://community.jboss.org/docs/DOC-13439