Examples of com.googlecode.objectify.cache.CachingAsyncDatastoreService

com.googlecode.objectify.cache.CachingAsyncDatastoreService

A write-through memcache for Entity objects that works for both transactional and nontransactional sessions.

Caches negative results as well as positive results.
Queries do not affect the cache in any way.
Transactional reads bypass the cache, but successful transaction commits will update the cache.
This cache has near-transactional integrity. As long as DeadlineExceededException is not hit, cache should not go out of sync even under heavy contention.

Note: Until Google adds a hook that lets us wrap native Future implementations, you muse install the {@code AsyncCacheFilter} to use this cache asynchronously. Thisis not necessary for synchronous use of {@code CachingDatastoreService}, but asynchronous operation requires an extra hook for the end of a request when fired-and-forgotten put()s and delete()s get processed. If you use this cache asynchronously, and you do not use the {@code AsyncCacheFilter}, your cache will go out of sync.

@author Jeff Schnitzer

   */
  @BeforeMethod
  public void setUpExtra()
  {
    EntityMemcache mc = new EntityMemcache(null);
    cads = new CachingAsyncDatastoreService(DatastoreServiceFactory.getAsyncDatastoreService(), mc);
    nods = new CachingAsyncDatastoreService(new MockAsyncDatastoreService(), mc);
    
    key = KeyFactory.createKey("thing", 1);
    keyInSet = Collections.singleton(key);
    entity = new Entity(key);
    entity.setProperty("foo", "bar");

  public AsyncDatastoreService createAsyncDatastoreService(DatastoreServiceConfig cfg, boolean globalCache)
  {
    AsyncDatastoreService ads = this.createRawAsyncDatastoreService(cfg);


    if (globalCache && this.registrar.isCacheEnabled())
      return new CachingAsyncDatastoreService(ads, this.entityMemcache);
    else
      return ads;
  }

Examples of com.googlecode.objectify.cache.CachingAsyncDatastoreService

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