Examples with Key com.google.cloud.datastore.Key used on opensource projects

Example 41 with Key

use of com.google.cloud.datastore.Key in project google-cloud-java by GoogleCloudPlatform.

the class TransactionSnippets method rollback.

/**
   * Example of rolling back a transaction.
   */
// [TARGET rollback()]
public Key rollback() {
    Datastore datastore = transaction.getDatastore();
    // [START rollback]
    // create an entity
    KeyFactory keyFactory = datastore.newKeyFactory().setKind("MyKind");
    Key key = datastore.allocateId(keyFactory.newKey());
    Entity entity = Entity.newBuilder(key).set("description", "rollback()").build();
    // add the entity and rollback
    transaction.put(entity);
    transaction.rollback();
    // [END rollback]
    return key;
}

Example 42 with Key

use of com.google.cloud.datastore.Key in project google-cloud-java by GoogleCloudPlatform.

the class TransactionSnippets method multiplePutEntities.

/**
   * Example of putting multiple entities.
   */
// [TARGET put(FullEntity...)]
// [VARIABLE "my_key_name1"]
// [VARIABLE "my_key_name2"]
public void multiplePutEntities(String keyName1, String keyName2) {
    Datastore datastore = transaction.getDatastore();
    // [START multiplePutEntities]
    Key key1 = datastore.newKeyFactory().setKind("MyKind").newKey(keyName1);
    Entity.Builder entityBuilder1 = Entity.newBuilder(key1);
    entityBuilder1.set("propertyName", "value1");
    Entity entity1 = entityBuilder1.build();
    Key key2 = datastore.newKeyFactory().setKind("MyKind").newKey(keyName2);
    Entity.Builder entityBuilder2 = Entity.newBuilder(key2);
    entityBuilder2.set("propertyName", "value2");
    Entity entity2 = entityBuilder2.build();
    transaction.put(entity1, entity2);
    transaction.commit();
// [END multiplePutEntities]
}

Example 43 with Key

use of com.google.cloud.datastore.Key in project google-cloud-java by GoogleCloudPlatform.

the class TransactionSnippets method commit.

/**
   * Example of committing a transaction.
   */
// [TARGET commit()]
public Key commit() {
    Datastore datastore = transaction.getDatastore();
    // [START commit]
    // create an entity
    KeyFactory keyFactory = datastore.newKeyFactory().setKind("MyKind");
    Key key = datastore.allocateId(keyFactory.newKey());
    Entity entity = Entity.newBuilder(key).set("description", "commit()").build();
    // add the entity and commit
    try {
        transaction.put(entity);
        transaction.commit();
    } catch (DatastoreException ex) {
    // handle exception
    }
    return key;
}

Example 44 with Key

use of com.google.cloud.datastore.Key in project google-cloud-java by GoogleCloudPlatform.

the class ITDatastoreSnippets method testAllocateIdSingle.

@Test
public void testAllocateIdSingle() {
    Key key = datastoreSnippets.allocateIdSingle();
    assertNotNull(key);
}

Example 45 with Key

use of com.google.cloud.datastore.Key in project google-cloud-java by GoogleCloudPlatform.

the class ITQuerySnippets method beforeClass.

@BeforeClass
public static void beforeClass() {
    datastore = DatastoreOptions.getDefaultInstance().getService();
    Key key1 = Key.newBuilder(datastore.getOptions().getProjectId(), KIND, "key1").build();
    Key key2 = Key.newBuilder(datastore.getOptions().getProjectId(), KIND, "key2").build();
    entity1 = Entity.newBuilder(key1).set("description", "entity1").build();
    entity2 = Entity.newBuilder(key2).set("description", "entity2").build();
    datastore.put(entity1, entity2);
}