Examples with Query com.google.appengine.api.datastore.Query used on opensource projects

Example 21 with Query

use of com.google.appengine.api.datastore.Query in project java-docs-samples by GoogleCloudPlatform.

the class StartupServletTest method doGet_emptyDatastore_writesPresidents.

@Test
public void doGet_emptyDatastore_writesPresidents() throws Exception {
    servletUnderTest.doGet(mockRequest, mockResponse);
    Filter nameFilter = new FilterPredicate("name", FilterOperator.EQUAL, "George Washington");
    Query q = new Query("Person").setFilter(nameFilter);
    Entity result = datastore.prepare(q).asSingleEntity();
    assertThat(result.getProperty("name")).named("name").isEqualTo("George Washington");
}

Example 22 with Query

use of com.google.appengine.api.datastore.Query in project java-docs-samples by GoogleCloudPlatform.

the class ReadPolicyTest method readPolicy_strong_returnsAllResults.

@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());
    assertThat(results).named("query results").hasSize(2);
}

Example 23 with Query

use of com.google.appengine.api.datastore.Query in project java-docs-samples by GoogleCloudPlatform.

the class ReadPolicyTest method readPolicy_eventual_returnsNoResults.

@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());
    assertThat(results).named("query results").isEmpty();
}

Example 24 with Query

use of com.google.appengine.api.datastore.Query in project java-docs-samples by GoogleCloudPlatform.

the class IndexesTest method propertyFilterExample_returnsMatchingEntities.

@Test
public void propertyFilterExample_returnsMatchingEntities() throws Exception {
    // [START unindexed_properties_1]
    DatastoreService datastore = DatastoreServiceFactory.getDatastoreService();
    Key acmeKey = KeyFactory.createKey("Company", "Acme");
    Entity tom = new Entity("Person", "Tom", acmeKey);
    tom.setProperty("name", "Tom");
    tom.setProperty("age", 32);
    datastore.put(tom);
    Entity lucy = new Entity("Person", "Lucy", acmeKey);
    lucy.setProperty("name", "Lucy");
    lucy.setUnindexedProperty("age", 29);
    datastore.put(lucy);
    Filter ageFilter = new FilterPredicate("age", FilterOperator.GREATER_THAN, 25);
    Query q = new Query("Person").setAncestor(acmeKey).setFilter(ageFilter);
    // Returns tom but not lucy, because her age is unindexed
    List<Entity> results = datastore.prepare(q).asList(FetchOptions.Builder.withDefaults());
    // [END unindexed_properties_1]
    assertThat(results).named("query results").containsExactly(tom);
}

Example 25 with Query

use of com.google.appengine.api.datastore.Query in project java-docs-samples by GoogleCloudPlatform.

the class ListPeopleServletTest method getFirstCursor.

private String getFirstCursor() {
    Query q = new Query("Person").addSort("name", SortDirection.ASCENDING);
    PreparedQuery pq = datastore.prepare(q);
    FetchOptions fetchOptions = FetchOptions.Builder.withLimit(ListPeopleServlet.PAGE_SIZE);
    QueryResultList<Entity> results = pq.asQueryResultList(fetchOptions);
    return results.getCursor().toWebSafeString();
}