Storage Class

If you have any questions during development, post them on the Issues page of GitHub. For details about parameters and usage of each API, see the .

OBS allows you to set storage classes for buckets. The storage class of an object defaults to be that of its residing bucket. Different storage classes meet different needs for storage performance and costs. There are three types of storage class for buckets, as described in the following table:

Storage Class	Description	Value in OBS Android SDK
OBS Standard	Features low access latency and high throughput and is applicable to storing frequently-accessed (multiple times per month) hotspot or small objects (< 1 MB) requiring quick response.	StorageClassEnum.STANDARD
OBS Infrequent Access	Is applicable to storing semi-frequently accessed (less than 12 times a year) data requiring quick response.	StorageClassEnum.WARM
OBS Archive	Is applicable to archiving rarely-accessed (once a year) data.	StorageClassEnum.COLD

For more information, see Bucket Storage Classes.

Setting the Storage Class for a Bucket

You can call ObsClient.setBucketStoragePolicy to set the storage class for a bucket. Sample code is as follows:

// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY_ID.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
String ak = System.getenv("ACCESS_KEY_ID");
String sk = System.getenv("SECRET_ACCESS_KEY_ID");
String endPoint = "https://your-endpoint";
// Create an ObsClient instance.
ObsClient obsClient = new ObsClient(ak, sk, endPoint);

// Set the storage class to Infrequent Access.
BucketStoragePolicyConfiguration storgePolicy = new BucketStoragePolicyConfiguration();
storgePolicy.setBucketStorageClass(StorageClassEnum.WARM);
obsClient.setBucketStoragePolicy("bucketname", storgePolicy);

Obtaining the Storage Class of a Bucket

You can call ObsClient.getBucketStoragePolicy to obtain the storage class of a bucket. Sample code is as follows:

// Hard-coded or plaintext AK/SK are risky. For security purposes, encrypt your AK/SK and store them in the configuration file or environment variables. In this example, the AK/SK are stored in environment variables for identity authentication. Before running this example, configure environment variables ACCESS_KEY_ID and SECRET_ACCESS_KEY_ID.
// Obtain an AK/SK pair on the management console. For details, see https://support.huaweicloud.com/eu/usermanual-ca/ca_01_0003.html.
String ak = System.getenv("ACCESS_KEY_ID");
String sk = System.getenv("SECRET_ACCESS_KEY_ID");
String endPoint = "https://your-endpoint";
// Create an ObsClient instance.
ObsClient obsClient = new ObsClient(ak, sk, endPoint);

BucketStoragePolicyConfiguration storagePolicy = obsClient.getBucketStoragePolicy("bucketname");
Log.i("GetBucketStoragePolicy", "\t" + storagePolicy.getBucketStorageClass());