Filter + a sustained loading APC cache

I have a cache which is a JPA cache attached to an Oracle database. I'm trying to use a filter to get an entrySet of objects in the cache. I tried several different filters and they all work very well as long as the data is already in the cache. If data is still in the database (i.e. a get was not issued for the article and therefore consistency has not loaded into the cache) the filter does not return the results.

Is it possible to have a filter of consistency to load the data from the base of the force? Or the filter only works on items that are already in the cache?

Basic configuration:

-Database has X entries in it.
-Consistency and the application are launched and there are 0 items in the cache.
-I want to use a filter for a return to a set of items in the cache.
-The filter returns 0 items even if the items in the database.
-If I issue a get then the data is first in the cache and the filter works.

A code that I have tried:
      // LIKE FILTER
      Filter query = new LikeFilter(IdentityExtractor.INSTANCE, "%", '\\', true);
      Set results = configurationCache.entrySet(query);
      for (Iterator i = results.iterator(); i.hasNext();)
      {
        Map.Entry e = (Map.Entry) i.next();
        log.info("key: " + e.getKey() + ", value: " + e.getValue());
      }

      // COMPARE FILTER
      Filter compareFilter = new ContainsFilter("getChain", chain);
      Set results2 = configurationCache.entrySet(compareFilter);

      // KEY EXTRACTOR
      Filter filter = new EqualsFilter(new KeyExtractor("getChain"), chain);
      Set<Map.Entry<Object, Object>> configurations = configurationCache.entrySet(filter);
Maybe I just need to use a different type of filter?

Worse, if there is not way to have consistency load data from the database using a filter, then I can preload the data of the database by making essentially a select * from the database and then issue a put / get for each item, but I prefer not to do this.

Thank you

To query a cache (with filter), the cache entries must be created before the interrogation; You can use getAll() method to load the data into the cache.

-Luk

Tags: Fusion Middleware

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