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

Example 6 with Datastore

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

the class TransactionSnippets method multipleUpdateEntities.

/**
   * Example of updating multiple entities.
   */
// [TARGET update(Entity...)]
// [VARIABLE "my_key_name1"]
// [VARIABLE "my_key_name2"]
public void multipleUpdateEntities(String keyName1, String keyName2) {
    Datastore datastore = transaction.getDatastore();
    // [START multipleUpdateEntities]
    Key key1 = datastore.newKeyFactory().setKind("MyKind").newKey(keyName1);
    Entity.Builder entityBuilder1 = Entity.newBuilder(key1);
    entityBuilder1.set("propertyName", "value3");
    Entity entity1 = entityBuilder1.build();
    Key key2 = datastore.newKeyFactory().setKind("MyKind").newKey(keyName2);
    Entity.Builder entityBuilder2 = Entity.newBuilder(key2);
    entityBuilder2.set("propertyName", "value4");
    Entity entity2 = entityBuilder2.build();
    transaction.update(entity1, entity2);
    transaction.commit();
// [END multipleUpdateEntities]
}

Example 7 with Datastore

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

the class TransactionSnippets method getMultiple.

/**
   * Example of getting entities for several keys.
   */
// [TARGET get(Key...)]
// [VARIABLE "my_first_key_name"]
// [VARIABLE "my_second_key_name"]
public List<Entity> getMultiple(String firstKeyName, String secondKeyName) {
    Datastore datastore = transaction.getDatastore();
    // TODO change so that it's not necessary to hold the entities in a list for integration testing
    // [START getMultiple]
    KeyFactory keyFactory = datastore.newKeyFactory().setKind("MyKind");
    Key firstKey = keyFactory.newKey(firstKeyName);
    Key secondKey = keyFactory.newKey(secondKeyName);
    Iterator<Entity> entitiesIterator = transaction.get(firstKey, secondKey);
    List<Entity> entities = Lists.newArrayList();
    while (entitiesIterator.hasNext()) {
        Entity entity = entitiesIterator.next();
        // do something with the entity
        entities.add(entity);
    }
    transaction.commit();
    // [END getMultiple]
    return entities;
}

Example 8 with Datastore

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

the class TransactionSnippets method multipleAddEntitiesDeferredId.

/**
   * Example of adding multiple entities with deferred id allocation.
   */
// [TARGET addWithDeferredIdAllocation(FullEntity...)]
public List<Key> multipleAddEntitiesDeferredId() {
    Datastore datastore = transaction.getDatastore();
    // [START multipleAddEntitiesDeferredId]
    IncompleteKey key1 = datastore.newKeyFactory().setKind("MyKind").newKey();
    FullEntity.Builder entityBuilder1 = FullEntity.newBuilder(key1);
    entityBuilder1.set("propertyName", "value1");
    FullEntity entity1 = entityBuilder1.build();
    IncompleteKey key2 = datastore.newKeyFactory().setKind("MyKind").newKey();
    FullEntity.Builder entityBuilder2 = FullEntity.newBuilder(key2);
    entityBuilder2.set("propertyName", "value2");
    FullEntity entity2 = entityBuilder2.build();
    transaction.addWithDeferredIdAllocation(entity1, entity2);
    Response response = transaction.commit();
    // [END multipleAddEntitiesDeferredId]
    return response.getGeneratedKeys();
}

Example 9 with Datastore

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

the class AddEntitiesAndRunQuery method main.

public static void main(String... args) {
    // Create datastore service object.
    // By default, credentials are inferred from the runtime environment.
    Datastore datastore = DatastoreOptions.getDefaultInstance().getService();
    // Add an entity to Datastore
    KeyFactory keyFactory = datastore.newKeyFactory().setKind("Person");
    Key key = keyFactory.newKey("john.doe@gmail.com");
    Entity entity = Entity.newBuilder(key).set("name", "John Doe").set("age", 51).set("favorite_food", "pizza").build();
    datastore.put(entity);
    // Get an entity from Datastore
    Entity johnEntity = datastore.get(key);
    // Add a couple more entities to make the query results more interesting
    Key janeKey = keyFactory.newKey("jane.doe@gmail.com");
    Entity janeEntity = Entity.newBuilder(janeKey).set("name", "Jane Doe").set("age", 44).set("favorite_food", "pizza").build();
    Key joeKey = keyFactory.newKey("joe.shmoe@gmail.com");
    Entity joeEntity = Entity.newBuilder(joeKey).set("name", "Joe Shmoe").set("age", 27).set("favorite_food", "sushi").build();
    datastore.put(janeEntity, joeEntity);
    // Run a query
    Query<Entity> query = Query.newEntityQueryBuilder().setKind("Person").setFilter(PropertyFilter.eq("favorite_food", "pizza")).build();
    QueryResults<Entity> results = datastore.run(query);
    while (results.hasNext()) {
        Entity currentEntity = results.next();
        System.out.println(currentEntity.getString("name") + ", you're invited to a pizza party!");
    }
}

Example 10 with Datastore

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

the class CreateEntity method main.

public static void main(String... args) {
    Datastore datastore = DatastoreOptions.getDefaultInstance().getService();
    KeyFactory keyFactory = datastore.newKeyFactory().setKind("keyKind");
    Key key = keyFactory.newKey("keyName");
    Entity entity = Entity.newBuilder(key).set("name", "John Doe").set("age", 30).set("access_time", Timestamp.now()).build();
    datastore.put(entity);
}