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ModifyACLExistingObject.java

ModifyACLExistingObject.java demonstrates how to retrieve, modify, and set the ACL grants for an S3 object.

/** * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * This file is licensed under the Apache License, Version 2.0 (the "License"). * You may not use this file except in compliance with the License. A copy of * the License is located at * * http://aws.amazon.com/apache2.0/ * * This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR * CONDITIONS OF ANY KIND, either express or implied. See the License for the * specific language governing permissions and limitations under the License. */ import java.io.IOException; import com.amazonaws.AmazonServiceException; import com.amazonaws.SdkClientException; import com.amazonaws.auth.profile.ProfileCredentialsProvider; import com.amazonaws.services.s3.AmazonS3; import com.amazonaws.services.s3.AmazonS3ClientBuilder; import com.amazonaws.services.s3.model.AccessControlList; import com.amazonaws.services.s3.model.CanonicalGrantee; import com.amazonaws.services.s3.model.EmailAddressGrantee; import com.amazonaws.services.s3.model.Permission; public class ModifyACLExistingObject { public static void main(String[] args) throws IOException { String clientRegion = "*** Client region ***"; String bucketName = "*** Bucket name ***"; String keyName = "*** Key name ***"; String emailGrantee = "*** user@example.com ***"; try { AmazonS3 s3Client = AmazonS3ClientBuilder.standard() .withCredentials(new ProfileCredentialsProvider()) .withRegion(clientRegion) .build(); // Get the existing object ACL that we want to modify. AccessControlList acl = s3Client.getObjectAcl(bucketName, keyName); // Clear the existing list of grants. acl.getGrantsAsList().clear(); // Grant a sample set of permissions, using the existing ACL owner for Full Control permissions. acl.grantPermission(new CanonicalGrantee(acl.getOwner().getId()), Permission.FullControl); acl.grantPermission(new EmailAddressGrantee(emailGrantee), Permission.WriteAcp); // Save the modified ACL back to the object. s3Client.setObjectAcl(bucketName, keyName, acl); } catch(AmazonServiceException e) { // The call was transmitted successfully, but Amazon S3 couldn't process // it, so it returned an error response. e.printStackTrace(); } catch(SdkClientException e) { // Amazon S3 couldn't be contacted for a response, or the client // couldn't parse the response from Amazon S3. e.printStackTrace(); } } }

Sample Details

Service: s3

Last tested: 2019-01-28

Author: AWS

Type: full-example

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