• Object Storage Service

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  3. Developer Guide (Android SDK)
  4. Versioning Management
  5. Setting Versioning Status for a Bucket

Setting Versioning Status for a Bucket

You can call ObsClient.setBucketVersioning to set the versioning status for a bucket. OBS supports two versioning statuses.

Versioning Status

Description

Value in OBS Android SDK

Enabled

  1. OBS creates a unique version ID for each uploaded object. Namesake objects are not overwritten and are distinguished by their own version IDs.
  2. Objects can be downloaded by specifying the version ID. By default, the object of the latest version is downloaded if no version ID is specified.
  3. Objects can be deleted by specifying the version ID. If an object is deleted with no version ID specified, the object will generate a delete marker with a unique version ID but is not physically deleted.
  4. The latest objects in a bucket are returned by default after ObsClient.listObjects is called. You can call ObsClient.listVersions to list a bucket's objects with all version IDs.
  5. Except for delete markers, storage space occupied by objects with all version IDs is billed.

VersioningStatusEnum.ENABLED

Suspended

  1. Noncurrent object versions are not affected.
  2. OBS creates version ID null to an uploaded object and the object will be overwritten after a namesake one is uploaded.
  3. Objects can be downloaded by specifying the version ID. By default, the object of the latest version is downloaded if no version ID is specified.
  4. Objects can be deleted by specifying version IDs. If an object is deleted with no version ID specified, the object is only attached with a delete marker whose version ID is null. Objects with version ID null are physically deleted.
  5. Except for delete markers, storage space occupied by objects with all version IDs is billed.

VersioningStatusEnum.SUSPENDED

Sample code:

String endPoint = "yourdomainname";
String ak = "*** Provide your Access Key ***";
String sk = "*** Provide your Secret Key ***";
// Create an instance of ObsClient.
ObsClient obsClient = new ObsClient(ak, sk, endPoint);

// Enable versioning.
obsClient.setBucketVersioning("bucketname", new BucketVersioningConfiguration(VersioningStatusEnum.ENABLED));

// Suspend versioning.
obsClient.setBucketVersioning("bucketname", new BucketVersioningConfiguration(VersioningStatusEnum.SUSPENDED));

// Close obsClient.
obsClient.close();