com.google.appengine.api.datastore.DatastoreServiceConfig Java Examples

/**
 * Performs static initialization for Objectify to register types and do other setup.
 *
 * <p>This method is non-idempotent, so it should only be called exactly once, which is achieved
 * by calling it from this class's static initializer block.
 */
private static void initOfyOnce() {
  // Set an ObjectifyFactory that uses our extended ObjectifyImpl.
  // The "false" argument means that we are not using the v5-style Objectify embedded entities.
  com.googlecode.objectify.ObjectifyService.setFactory(new ObjectifyFactory(false) {
    @Override
    public Objectify begin() {
      return new SessionKeyExposingObjectify(this);
    }

    @Override
    protected AsyncDatastoreService createRawAsyncDatastoreService(DatastoreServiceConfig cfg) {
      // In the unit test environment, wrap the Datastore service in a proxy that can be used to
      // examine the number of requests sent to Datastore.
      AsyncDatastoreService service = super.createRawAsyncDatastoreService(cfg);
      return RegistryEnvironment.get().equals(RegistryEnvironment.UNITTEST)
          ? new RequestCapturingAsyncDatastoreService(service)
          : service;
    }});

  // Translators must be registered before any entities can be registered.
  registerTranslators();
  registerEntityClasses(EntityClasses.ALL_CLASSES);
}
 

@Test
public void readPolicy_strong_returnsAllResults() {
  double deadline = 5.0;
  ReadPolicy policy = new ReadPolicy(ReadPolicy.Consistency.STRONG);
  DatastoreServiceConfig datastoreConfig =
      DatastoreServiceConfig.Builder.withReadPolicy(policy).deadline(deadline);
  DatastoreService datastore = DatastoreServiceFactory.getDatastoreService(datastoreConfig);

  Entity parent = new Entity("Person", "a");
  Entity child = new Entity("Person", "b", parent.getKey());
  datastore.put(ImmutableList.<Entity>of(parent, child));

  Query q = new Query("Person").setAncestor(parent.getKey());
  List<Entity> results = datastore.prepare(q).asList(FetchOptions.Builder.withDefaults());
  assertWithMessage("query results").that(results).hasSize(2);
}
 

@Test
public void testConfigBuilder() {
    DatastoreServiceConfig config = DatastoreServiceConfig.Builder.withDefaults();
    assertEquals(new ReadPolicy(Consistency.STRONG).getConsistency(), config.getReadPolicy().getConsistency());

    config = DatastoreServiceConfig.Builder.withDeadline(10);
    assertEquals(new Double(10), config.getDeadline());
    config.deadline(20);
    assertEquals(new Double(20), config.getDeadline());

    config = DatastoreServiceConfig.Builder.withImplicitTransactionManagementPolicy(ImplicitTransactionManagementPolicy.AUTO);
    assertEquals(ImplicitTransactionManagementPolicy.AUTO, config.getImplicitTransactionManagementPolicy());
    config.implicitTransactionManagementPolicy(ImplicitTransactionManagementPolicy.NONE);
    assertEquals(ImplicitTransactionManagementPolicy.NONE, config.getImplicitTransactionManagementPolicy());

    config = DatastoreServiceConfig.Builder.withMaxEntityGroupsPerRpc(5);
    assertEquals(new Integer(5), config.getMaxEntityGroupsPerRpc());
    config.maxEntityGroupsPerRpc(2);
    assertEquals(new Integer(2), config.getMaxEntityGroupsPerRpc());

    config = DatastoreServiceConfig.Builder.withReadPolicy(new ReadPolicy(Consistency.EVENTUAL));
    assertEquals(new ReadPolicy(Consistency.EVENTUAL).getConsistency(), config.getReadPolicy().getConsistency());
    config.readPolicy(new ReadPolicy(Consistency.STRONG));
    assertEquals(new ReadPolicy(Consistency.STRONG).getConsistency(), config.getReadPolicy().getConsistency());
}
 

@Test
public void readPolicy_eventual_returnsNoResults() {
  // [START data_consistency]
  double deadline = 5.0;

  // Construct a read policy for eventual consistency
  ReadPolicy policy = new ReadPolicy(ReadPolicy.Consistency.EVENTUAL);

  // Set the read policy
  DatastoreServiceConfig eventuallyConsistentConfig =
      DatastoreServiceConfig.Builder.withReadPolicy(policy);

  // Set the call deadline
  DatastoreServiceConfig deadlineConfig = DatastoreServiceConfig.Builder.withDeadline(deadline);

  // Set both the read policy and the call deadline
  DatastoreServiceConfig datastoreConfig =
      DatastoreServiceConfig.Builder.withReadPolicy(policy).deadline(deadline);

  // Get Datastore service with the given configuration
  DatastoreService datastore = DatastoreServiceFactory.getDatastoreService(datastoreConfig);
  // [END data_consistency]

  Entity parent = new Entity("Person", "a");
  Entity child = new Entity("Person", "b", parent.getKey());
  datastore.put(ImmutableList.<Entity>of(parent, child));

  // Even though we are using an ancestor query, the policy is set to
  // eventual, so we should get eventually-consistent results. Since the
  // local data store test config is set to 100% unapplied jobs, there
  // should be no results.
  Query q = new Query("Person").setAncestor(parent.getKey());
  List<Entity> results = datastore.prepare(q).asList(FetchOptions.Builder.withDefaults());
  assertWithMessage("query results").that(results).isEmpty();
}
 

@Override
protected void doGet(
    HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
    throws ServletException, IOException {
  PrintWriter writer = httpServletResponse.getWriter();
  // Just because it's deprecated doesn't mean we don't want to test it.
  DatastoreConfig config = DatastoreServiceFactory.getDefaultDatastoreConfig();
  writer.println(config.getImplicitTransactionManagementPolicy().name());
  DatastoreServiceConfig serviceConfig = DatastoreServiceConfig.Builder.withDefaults();
  writer.println(serviceConfig.getImplicitTransactionManagementPolicy().name());
  writer.println(serviceConfig.getReadPolicy().getConsistency());
  writer.println(serviceConfig.getDeadline());
}
 

@Test(expected = ApiDeadlineExceededException.class)
public void testDeadlineConfig() {
    DatastoreServiceConfig config = DatastoreServiceConfig.Builder.withDeadline(0.00001);
    DatastoreService ds = DatastoreServiceFactory.getDatastoreService(config);
    assertNotNull(ds);
    Entity g1 = new Entity("test");
    g1.setProperty("deadline", "0.00001");
    ds.put(g1);
}
 

@Test
public void testAutoPolicy() throws Exception {
    DatastoreServiceConfig config = DatastoreServiceConfig.Builder.withImplicitTransactionManagementPolicy(ImplicitTransactionManagementPolicy.AUTO);
    DatastoreService ds = DatastoreServiceFactory.getDatastoreService(config);

    Key k1 = null;
    Transaction tx = ds.beginTransaction();
    try {
        // this one should be part of auto Tx
        k1 = ds.put(new Entity("PutAutoTx"));
    } finally {
        tx.rollback();
    }

    Assert.assertTrue(ds.get(Collections.singleton(k1)).isEmpty());

    k1 = ds.put(new Entity("DeleteAutoTx"));
    try {
        Assert.assertNotNull(ds.get(k1));

        tx = ds.beginTransaction();
        try {
            // this one should be part of auto Tx
            ds.delete(k1);
        } finally {
            tx.rollback();
        }

        Assert.assertNotNull(ds.get(k1));
    } finally {
        ds.delete(k1);
    }
}
 

@Test(expected = IllegalArgumentException.class)
public void testTranManagePolicyAsyncInvalidConfig() {
    DatastoreServiceConfig config = DatastoreServiceConfig.Builder.withImplicitTransactionManagementPolicy(ImplicitTransactionManagementPolicy.AUTO);
    // Async Service does not support AUTO
    DatastoreServiceFactory.getAsyncDatastoreService(config);
}