Package com.google.cloud.storage (2.20.2)

A client for Cloud Storage - Unified object storage.

Here's a simple usage example the Java Storage client. This example shows how to create a Storage object.


 Storage storage = StorageOptions.getDefaultInstance().getService();
 BlobId blobId = BlobId.of("bucket", "blob_name");
 BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
 Blob blob = storage.create(blobInfo, "Hello, Cloud Storage!".getBytes(UTF_8));

This second example shows how to update an object's content if the object exists.


 Storage storage = StorageOptions.getDefaultInstance().getService();
 BlobId blobId = BlobId.of("bucket", "blob_name");
 Blob blob = storage.get(blobId);
 if (blob != null) {
   byte[] prevContent = blob.getContent();
   System.out.println(new String(prevContent, UTF_8));
   WritableByteChannel channel = blob.writer();
   channel.write(ByteBuffer.wrap("Updated content".getBytes(UTF_8)));
   channel.close();
 }

For more detailed code examples, see the sample library.

When using google-cloud from outside of App/Compute Engine, you have to specify a project ID and provide credentials.

Operations in this library are generally thread safe, except for the use of BlobReadChannel and BlobWriteChannel. See Also: Google Cloud Storage

Classes

Acl

Access Control List for buckets or blobs. See Also: About Access Control Lists

Acl.Builder

Builder for Acl objects.

Acl.Domain

Class for ACL Domain entities.

Acl.Entity

Base class for Access Control List entities.

Acl.Group

Class for ACL Group entities.

Acl.Project

Class for ACL Project entities.

Acl.Project.ProjectRole

Acl.RawEntity

Acl.Role

Acl.User

Class for ACL User entities.

Blob

An object in Google Cloud Storage. A Blob object includes the BlobId instance, the set of properties inherited from the BlobInfo class and the Storage instance. The class provides methods to perform operations on the object. Reading a property value does not issue any RPC calls. The object content is not stored within the Blob instance. Operations that access the content issue one or multiple RPC calls, depending on the content size.

Objects of this class are immutable. Operations that modify the blob like #update and #copyTo return a new object. Any changes to the object in Google Cloud Storage made after creation of the Blob are not visible in the Blob. To get a Blob object with the most recent information use #reload.

Example of getting the content of the object in Google Cloud Storage:


 BlobId blobId = BlobId.of(bucketName, blobName);
 Blob blob = storage.get(blobId);
 long size = blob.getSize(); // no RPC call is required
 byte[] content = blob.getContent(); // one or multiple RPC calls will be issued

Blob.BlobSourceOption

Class for specifying blob source options when Blob methods are used.

Blob.Builder

Builder for Blob.

BlobId

Google Storage Object identifier. A BlobId object includes the name of the containing bucket, the blob's name and possibly the blob's generation. If #getGeneration() is null the identifier refers to the latest blob's generation.

BlobInfo

Information about an object in Google Cloud Storage. A BlobInfo object includes the BlobId instance and the set of properties, such as the blob's access control configuration, user provided metadata, the CRC32C checksum, etc. Instances of this class are used to create a new object in Google Cloud Storage or update the properties of an existing object. To deal with existing Storage objects the API includes the Blob class which extends BlobInfo and declares methods to perform operations on the object. Neither BlobInfo nor Blob instances keep the object content, just the object properties.

Example of usage BlobInfo to create an object in Google Cloud Storage:


 BlobId blobId = BlobId.of(bucketName, blobName);
 BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("text/plain").build();
 Blob blob = storage.create(blobInfo, "Hello, world".getBytes(StandardCharsets.UTF_8));

See Also: Concepts and Terminology

BlobInfo.Builder

Builder for BlobInfo.

BlobInfo.CustomerEncryption

Objects of this class hold information on the customer-supplied encryption key, if the blob is encrypted using such a key.

BlobInfo.ImmutableEmptyMap<K,V>

This class is meant for internal use only. Users are discouraged from using this class.

Bucket

A Google cloud storage bucket.

Objects of this class are immutable. Operations that modify the bucket like #update return a new object. To get a Bucket object with the most recent information use #reload. Bucket adds a layer of service-related functionality over BucketInfo.

Bucket.BlobTargetOption

Class for specifying blob target options when Bucket methods are used.

Bucket.BlobWriteOption

Class for specifying blob write options when Bucket methods are used.

Bucket.BucketSourceOption

Class for specifying bucket source options when Bucket methods are used.

Bucket.Builder

Builder for Bucket.

BucketInfo

Google Storage bucket metadata; See Also: Concepts and Terminology

BucketInfo.AgeDeleteRule (deprecated)

Deprecated. Use a LifecycleRule with a DeleteLifecycleAction and use LifecycleCondition.Builder.setAge instead.

For example, new DeleteLifecycleAction(1) is equivalent to new LifecycleRule( LifecycleAction.newDeleteAction(), LifecycleCondition.newBuilder().setAge(1).build()))

Delete rule class that sets a Time To Live for blobs in the bucket. See Also: Object Lifecycle Management

BucketInfo.Autoclass

BucketInfo.Autoclass.Builder

BucketInfo.Builder

Builder for BucketInfo.

BucketInfo.CreatedBeforeDeleteRule (deprecated)

Deprecated. Use a LifecycleRule with an action DeleteLifecycleAction and a condition LifecycleCondition.Builder.setCreatedBefore instead.

Delete rule class for blobs in the bucket that have been created before a certain date. See Also: Object Lifecycle Management

BucketInfo.CustomPlacementConfig

The bucket's custom placement configuration for Custom Dual Regions. If using location is also required.

BucketInfo.CustomPlacementConfig.Builder