code: public void determineCacheProvider() {
          this.defaultProvider = true;
          if (cacheProviderName.equals("")) {
              cacheProviderName = CacheConfig.CACHE_PROVIDER_DYNACACHE;
          }
          if (!cacheProviderName.equals(CACHE_PROVIDER_DYNACACHE)) {
              defaultProvider = false;
              if (tc.isDebugEnabled()) {
                  Tr.debug(tc, "Alternate CacheProvider " + cacheProviderName + " set for " + cacheName);
              }
          }
      }
docs: Determines if default cache provider is being used and sets flag accordingly.