Help Center> Object Storage Service> Android> Lifecycle Management> Setting Lifecycle Rules
Updated on 2023-11-09 GMT+08:00
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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 API Reference

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/intl/en-us/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 being 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/intl/en-us/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 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);
Parent topic: Lifecycle Management