com.google.cloud.datastore
A client for Cloud Datastore – A highly-scalable NoSQL database for web and mobile applications.
Here's a simple usage example for using google-cloud from App/Compute Engine. This example shows how to create a Datastore entity. For the complete source code see CreateEntity.java.
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);
This second example shows how to get and update a Datastore entity if it exists. For the complete source code see UpdateEntity.java.
Datastore datastore = DatastoreOptions.getDefaultInstance().getService();
KeyFactory keyFactory = datastore.newKeyFactory().setKind("keyKind");
Key key = keyFactory.newKey("keyName");
Entity entity = datastore.get(key);
if (entity != null) {
System.out.println("Updating access_time for " + entity.getString("name"));
entity = Entity.newBuilder(entity)
.set("access_time", Timestamp.now())
.build();
datastore.update(entity);
}
When using google-cloud from outside of App/Compute Engine, you have to specify a project ID and provide credentials. See Also: Google Cloud Datastore
com.google.cloud.datastore.admin.v1
A client to Cloud Datastore API
The interfaces provided are listed below, along with usage samples.
DatastoreAdminClient
Service Description: Google Cloud Datastore Admin API
The Datastore Admin API provides several admin services for Cloud Datastore.
----------------------------------------------------------------------------- ## Concepts
Project, namespace, kind, and entity as defined in the Google Cloud Datastore API.
Operation: An Operation represents work being performed in the background.
EntityFilter: Allows specifying a subset of entities in a project. This is specified as a combination of kinds and namespaces (either or both of which may be all).
----------------------------------------------------------------------------- ## Services
# Export/Import
The Export/Import service provides the ability to copy all or a subset of entities to/from Google Cloud Storage.
Exported data may be imported into Cloud Datastore for any Google Cloud Platform project. It is not restricted to the export source project. It is possible to export from one project and then import into another.
Exported data can also be loaded into Google BigQuery for analysis.
Exports and imports are performed asynchronously. An Operation resource is created for each export/import. The state (i