Setting Lifecycle Rules

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 .

You can call ObsClient.setBucketLifecycle to set lifecycle rules for a bucket.

Setting an Object Transition Policy

Sample code:

// 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);

LifecycleConfiguration config = new LifecycleConfiguration();
LifecycleConfiguration.Rule rule = config.new Rule();
rule.setEnabled(true);
rule.setId("rule1");
rule.setPrefix("prefix");
LifecycleConfiguration.Transition transition = config.new Transition();
// Specify that objects whose names contain the specified prefix will be transitioned 30 days after creation.
transition.setDays(30);
// Specify the storage class of the objects after transition.
transition.setObjectStorageClass(StorageClassEnum.STANDARD);
// Specify when the objects whose names contain the specified prefix will be transitioned.
// transition.setDate(new SimpleDateFormat("yyyy-MM-dd").parse("2018-10-31")); 
rule.getTransitions().add(transition);

LifecycleConfiguration.NoncurrentVersionTransition noncurrentVersionTransition = config.new NoncurrentVersionTransition();
// Specify that objects whose names contain the specified prefix will be transitioned 30 days after becoming noncurrent versions.
noncurrentVersionTransition.setDays(30);
// Specify the storage class of the noncurrent object version after transition.
noncurrentVersionTransition.setObjectStorageClass(StorageClassEnum.COLD);
rule.getNoncurrentVersionTransitions().add(noncurrentVersionTransition);

config.addRule(rule);

obsClient.setBucketLifecycle("bucketname", config);

Setting an Object Expiration Time

Sample code:

// 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);

LifecycleConfiguration config = new LifecycleConfiguration();

Rule rule = config.new Rule();
rule.setEnabled(true);
rule.setId("rule1");
rule.setPrefix("prefix");
Expiration expiration = config.new Expiration();
// Specify that objects whose names contain the specified prefix will expire 60 days after creation.
expiration.setDays(60);
// Specify the date when the objects whose names contain the specified prefix will expire.
// expiration.setDate(new SimpleDateFormat("yyyy-MM-dd").parse("2018-12-31")); 
rule.setExpiration(expiration);

NoncurrentVersionExpiration noncurrentVersionExpiration = config.new NoncurrentVersionExpiration();
// Specify that objects whose names contain the prefix will expire 60 days after changing into noncurrent versions.
noncurrentVersionExpiration.setDays(60);
rule.setNoncurrentVersionExpiration(noncurrentVersionExpiration);
config.addRule(rule);

obsClient.setBucketLifecycle("bucketname", config);