Batch Deleting Objects (SDK for Java)

Function

This API deletes objects in batches from a specific bucket. Deleted objects cannot be recovered.

In a batch delete operation, OBS concurrently deletes the specified objects and returns the deletion result of each object.

If you have any questions during development, post them on the Issues page of GitHub.

Restrictions

To delete objects in a batch, you must be the bucket owner or have the required permission (obs:object:DeleteObject in IAM or DeleteObject in a bucket policy). For details, see Introduction to OBS Access Control, IAM Custom Policies, and Configuring an Object Policy.
The mapping between OBS regions and endpoints must comply with what is listed in Regions and Endpoints.
If versioning is not enabled for a bucket, deleted objects cannot be recovered.
A maximum of 1,000 objects can be deleted at a time. If you send a request for deleting more than 1,000 objects, OBS returns an error message.
After concurrent tasks are assigned, if an internal error occurs during cyclic deletion of multiple objects, an object may be deleted in the index data but still exist in the metadata.

Method

obsClient.deleteObjects(DeleteObjectsRequest deleteRequest)

Request Parameters

**Table 1** List of request parameters
Parameter	Type	Mandatory (Yes/No)	Description
deleteRequest	DeleteObjectsRequest	Yes	Explanation: Request parameters for deleting objects in batches. For details, see Table 2.

**Table 2** DeleteObjectsRequest
Parameter	Type	Mandatory (Yes/No)	Description
bucketName	String	Yes	Explanation: Bucket name. Restrictions: A bucket name must be unique across all accounts and regions. A bucket name: Must be 3 to 63 characters long and start with a digit or letter. Lowercase letters, digits, hyphens (-), and periods (.) are allowed. Cannot be formatted as an IP address. Cannot start or end with a hyphen (-) or period (.). Cannot contain two consecutive periods (..), for example, my..bucket. Cannot contain periods (.) and hyphens (-) adjacent to each other, for example, my-.bucket or my.-bucket. If you repeatedly create buckets of the same name in the same region, no error will be reported and the bucket attributes comply with those set in the first creation request. Default value: None
keyAndVersions	List<KeyAndVersion>	Yes	Explanation: List of objects to be deleted. For details, see Table 3.
quiet	boolean	No	Explanation: Response mode to the request for deleting objects in a batch. Value range: false: The detailed mode. Results of both successful and failed deletions are returned. true: The quiet mode. Only results of failed deletions are returned. Default value: false
encodingType	String	No	Explanation: Encoding type for objectKey in the response. If objectKey in the response contains control characters that are not supported by the XML 1.0 standard, you can specify this parameter to encode objectKey. Value range: url Default value: None. If you leave this parameter blank, encoding is not applied.

**Table 3** KeyAndVersion
Parameter	Type	Mandatory (Yes/No)	Description
key	String	Yes	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt. Value range: The value must contain 1 to 1,024 characters. Default value: None
versionId	String	No	Explanation: Object version ID. Value range: The value must contain 32 characters. Default value: None. If this parameter is left blank, the latest version of the object is deleted.

Responses

**Table 4** DeleteObjectsResult
Parameter	Type	Description
statusCode	int	Explanation: HTTP status code. Value range: A status code is a group of digits that can be 2xx (indicating successes) or 4xx or 5xx (indicating errors). It indicates the status of a response. For more information, see Status Code. Default value: None
responseHeaders	Map<String, Object>	Explanation: Response header list, composed of tuples. In a tuple, the String key indicates the name of the header, and the Object value indicates the value of the header. Default value: None
deletedObjectResults	List<DeleteObjectResult>	Explanation: Response results of the request for deleting objects in a batch. For details, see Table 5.
errorResults	List<ErrorResult>	Explanation: List of objects that fail to be deleted. For details, see Table 6.

**Table 5** DeleteObjectResult
Parameter	Type	Description
statusCode	int	Explanation: HTTP status code. Value range: A status code is a group of digits that can be 2xx (indicating successes) or 4xx or 5xx (indicating errors). It indicates the status of a response. For more information, see Status Code. Default value: None
responseHeaders	Map<String, Object>	Explanation: Response header list, composed of tuples. In a tuple, the String key indicates the name of the header, and the Object value indicates the value of the header. Default value: None
versionId	String	Explanation: Object version ID. Value range: The value must contain 32 characters. Default value: None
deleteMarker	boolean	Explanation: Whether the deleted object is a delete marker. Value range: true: The deleted object is a delete marker. false: The deleted object is not a delete marker. Default value: false
objectKey	String	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt. Value range: The value must contain 1 to 1,024 characters. Default value: None

**Table 6** ErrorResult
Parameter	Type	Description
versionId	String	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt. Value range: The value must contain 1 to 1,024 characters. Default value: None
errorCode	String	Explanation: Error code for the failed deletion. For details, see OBS Error Codes.
objectKey	String	Explanation: Object name. An object is uniquely identified by an object name in a bucket. An object name is a complete path that does not contain the bucket name. For example, if the address for accessing the object is examplebucket.obs.ap-southeast-1.myhuaweicloud.com/folder/test.txt, the object name is folder/test.txt. Value range: The value must contain 1 to 1,024 characters. Default value: None
message	String	Explanation: Error message for the failed deletion. For details, see OBS Error Codes.

Code Examples

This example batch deletes all objects in bucket examplebucket.

    
     
       
       
         import com.obs.services.ObsClient;
import com.obs.services.exception.ObsException;
import com.obs.services.model.DeleteObjectsRequest;
import com.obs.services.model.DeleteObjectsResult;
import com.obs.services.model.ListVersionsRequest;
import com.obs.services.model.ListVersionsResult;
import com.obs.services.model.VersionOrDeleteMarker;
import java.awt.*;
public class DeleteObjects001 {
    public static void main(String[] args) {
        // Obtain an AK/SK pair using environment variables or import the AK/SK pair in other ways. Using hard coding may result in leakage.
        // Obtain an AK/SK pair on the management console.
        String ak = System.getenv("ACCESS_KEY_ID");
        String sk = System.getenv("SECRET_ACCESS_KEY_ID");
        // (Optional) If you are using a temporary AK/SK pair and a security token to access OBS, you are advised not to use hard coding, which may result in information leakage.
        // Obtain an AK/SK pair and a security token using environment variables or import them in other ways.
        // String securityToken = System.getenv("SECURITY_TOKEN");
        // Enter the endpoint corresponding to the bucket. CN-Hong Kong is used here as an example. Replace it with the one in your actual situation.
        String endPoint = "https://obs.ap-southeast-1.myhuaweicloud.com";
        // Obtain an endpoint using environment variables or import it in other ways.
        //String endPoint = System.getenv("ENDPOINT");
        
        // Create an ObsClient instance.
        // Use the permanent AK/SK pair to initialize the client.
        ObsClient obsClient = new ObsClient(ak, sk,endPoint);
        // Use the temporary AK/SK pair and security token to initialize the client.
        // ObsClient obsClient = new ObsClient(ak, sk, securityToken, endPoint);

        try {
            // Batch delete the objects.
            ListVersionsRequest request = new ListVersionsRequest("examplebucket");
            // Delete 100 objects at a time.
            request.setMaxKeys(100);
            ListVersionsResult result;
            do {
                result = obsClient.listVersions(request);
                DeleteObjectsRequest deleteRequest = new DeleteObjectsRequest("examplebucket");
                //deleteRequest.setQuiet(true); // This demo uses the verbose mode by default. To use the quiet mode, add this line of code.
                for (VersionOrDeleteMarker v : result.getVersions()) {
                    // Obtain objects' names and version IDs.
                    deleteRequest.addKeyAndVersion(v.getKey(), v.getVersionId());
                }
                if(deleteRequest.getKeyAndVersions().length > 0){
                    DeleteObjectsResult deleteResult = obsClient.deleteObjects(deleteRequest);
                    // Obtain successfully deleted objects.
                    System.out.println("DeletedObjectResults:"+ deleteResult.getDeletedObjectResults());
                    // Obtain objects failed to be deleted.
                    System.out.println("ErrorResults:"+ deleteResult.getErrorResults());
                }else{
                    System.out.println("No object to delete");
                }
                request.setKeyMarker(result.getNextKeyMarker());
                // If versioning is not enabled, do not configure VersionIdMarker.
                request.setVersionIdMarker(result.getNextVersionIdMarker());
            } while (result.isTruncated());
            System.out.println("deleteObjects successfully");
        } catch (ObsException e) {
            System.out.println("deleteObjects failed");
            // Request failed. Print the HTTP status code.
            System.out.println("HTTP Code:" + e.getResponseCode());
            // Request failed. Print the server-side error code.
            System.out.println("Error Code:" + e.getErrorCode());
            // Request failed. Print the error details.
            System.out.println("Error Message:" + e.getErrorMessage());
            // Request failed. Print the request ID.
            System.out.println("Request ID:" + e.getErrorRequestId());
            System.out.println("Host ID:" + e.getErrorHostId());
            e.printStackTrace();
        } catch (Exception e) {
            System.out.println("deleteObjects failed");
            // Print other error information.
            e.printStackTrace();
        }
    }
}

        

      

    
   