Java idiomatic client for Google Cloud Platform services.

• [Homepage] (https://googlecloudplatform.github.io/gcloud-java/)
• [API Documentation] (http://googlecloudplatform.github.io/gcloud-java/apidocs)

This client supports the following Google Cloud Platform services:

• [Google Cloud Datastore] (#google-cloud-datastore)
• [Google Cloud Storage] (#google-cloud-storage)

Note: This client is a work-in-progress, and may occasionally make backwards-incompatible changes.

If you are using Maven, add this to your pom.xml file

<dependency>
  <groupId>com.google.gcloud</groupId>
  <artifactId>gcloud-java</artifactId>
  <version>0.0.10</version>
</dependency>

If you are using Gradle, add this to your dependencies

compile 'com.google.gcloud:gcloud-java:jar:0.0.10'

If you are using SBT, add this to your dependencies

libraryDependencies += "com.google.gcloud" % "gcloud-java" % "0.0.10"

• DatastoreExample - A simple command line interface for the Cloud Datastore
  • Read more about using this application on the gcloud-java-examples docs page.
• StorageExample - A simple command line interface providing some of Cloud Storage's functionality
  • Read more about using this application on the gcloud-java-examples docs page.

There are multiple ways to authenticate to use Google Cloud services.

1. When using gcloud-java libraries from within Compute/App Engine, no additional authentication steps are necessary.
2. When using gcloud-java libraries elsewhere, there are two options:

• Generate a JSON service account key. Supply a path to the downloaded JSON credentials file when building the options supplied to datastore/storage constructor.
• If running locally for development/testing, you can use use Google Cloud SDK. To use the SDK authentication, download the SDK if you haven't already. Then login using the SDK (gcloud auth login in command line), and set your current project using gcloud config set project PROJECT_ID.

• API Documentation
• Official Documentation

Follow the activation instructions to use the Google Cloud Datastore API with your project.

Here is a code snippet showing a simple usage example from within Compute/App Engine. Note that you must supply credentials and a project ID if running this snippet elsewhere.

import com.google.gcloud.datastore.Datastore;
import com.google.gcloud.datastore.DatastoreOptions;
import com.google.gcloud.datastore.DateTime;
import com.google.gcloud.datastore.Entity;
import com.google.gcloud.datastore.Key;
import com.google.gcloud.datastore.KeyFactory;

Datastore datastore = DatastoreOptions.getDefaultInstance().service();
KeyFactory keyFactory = datastore.newKeyFactory().kind(KIND);
Key key = keyFactory.newKey(keyName);
Entity entity = datastore.get(key);
if (entity == null) {
  entity = Entity.builder(key)
      .set("name", "John Do")
      .set("age", 30)
      .set("access_time", DateTime.now())
      .build();
  datastore.put(entity);
} else {
  System.out.println("Updating access_time for " + entity.getString("name"));
  entity = Entity.builder(entity)
      .set("access_time", DateTime.now())
      .build();
  datastore.update(entity);
}

• API Documentation
• Official Documentation

Follow the activation instructions to use the Google Cloud Storage API with your project.

Here is a code snippet showing a simple usage example from within Compute/App Engine. Note that you must supply credentials and a project ID if running this snippet elsewhere.

import static java.nio.charset.StandardCharsets.UTF_8;

import com.google.gcloud.storage.Blob;
import com.google.gcloud.storage.BlobId;
import com.google.gcloud.storage.Storage;
import com.google.gcloud.storage.StorageOptions;

import java.nio.ByteBuffer;
import java.nio.channels.WritableByteChannel;

StorageOptions options = StorageOptions.builder().projectId("project").build();
Storage storage = options.service();
BlobId blobId = BlobId.of("bucket", "blob_name");
Blob blob = Blob.load(storage, blobId);
if (blob == null) {
  BlobInfo blobInfo = BlobInfo.builder(blobId).contentType("text/plain").build();
  storage.create(blobInfo, "Hello, Cloud Storage!".getBytes(UTF_8));
} else {
  System.out.println("Updating content for " + blobId.name());
  byte[] prevContent = blob.content();
  System.out.println(new String(prevContent, UTF_8));
  WritableByteChannel channel = blob.writer();
  channel.write(ByteBuffer.wrap("Updated content".getBytes(UTF_8)));
  channel.close();
}

Java 7 or above is required for using this client.

This library provides tools to help write tests for code that uses gcloud-java services.

See TESTING to read more about using our testing helpers.

This library follows [Semantic Versioning] (http://semver.org/).

It is currently in major version zero (0.y.z), which means that anything may change at any time and the public API should not be considered stable.

Contributions to this library are always welcome and highly encouraged.

See CONTRIBUTING for more information on how to get started.

Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms. See Code of Conduct for more information.

Apache 2.0 - See LICENSE for more information.