How do I determine programmatically if ehcache is running?

Question

I have a large java application that is configured to use JPA and Hibernate. It is also supposedly configured to use ehcaching for both entity and query caching. However, I have sql logging turned on and no entities are being cached. All of the entity queries are happening on every request.

How can I determine at runtime if it is even running ehcache and whether it thinks an entity should be cacheable?

I didn't write this app so I'm stuck a bit here.

It uses declarations for the caching on the classes.

It is correctly using all the other declarations for Hibernate to perform the read/write operations.

Answer 1

Try something like this:

List<CacheManager> tempManagers = CacheManager.ALL_CACHE_MANAGERS;
System.out.println("# of CMs : " + tempManagers.size());
for (CacheManager tempCM : tempManagers) {
        System.out.println("Got: " + tempCM.getName());
        String[] cacheNames = tempCM.getCacheNames();
        for (int i = 0; i < cacheNames.length; i++) {
            String cacheName = cacheNames[i];
            System.out.println(cacheName+" - "+ tempCM.getEhcache(cacheName).getStatistics().toString());
        }
}

Answer 2

The short answer - a debugger.

Put a breakpoint where you load an entity and follow it down the stack. See if it ever even attempts to get the object from EHCache. Also, check to see if it tries to put it in the cache after it fetches it from the DB.