Java tutorial
/** * Copyright 2013 Amazon.com, Inc. or its affiliates. All Rights Reserved. * * 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/ * * or in the "LICENSE" file accompanying this file. 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. */ package awslabs.lab21; import java.io.File; import java.net.URL; import java.util.Date; import java.util.List; import org.joda.time.DateTime; import org.joda.time.Instant; import com.amazonaws.regions.Region; import com.amazonaws.services.s3.AmazonS3; import com.amazonaws.services.s3.model.AccessControlList; import com.amazonaws.services.s3.model.Bucket; import com.amazonaws.services.s3.model.CannedAccessControlList; import com.amazonaws.services.s3.model.CreateBucketRequest; import com.amazonaws.services.s3.model.GeneratePresignedUrlRequest; import com.amazonaws.services.s3.model.ListObjectsRequest; import com.amazonaws.services.s3.model.ObjectListing; import com.amazonaws.services.s3.model.Owner; import com.amazonaws.services.s3.model.PutObjectRequest; import com.amazonaws.services.s3.model.PutObjectResult; import com.amazonaws.services.s3.model.S3ObjectSummary; import com.amazonaws.services.s3.model.SetBucketAclRequest; /** * Project: Lab2.1 * * The primary purpose of this lab is to gain experience working with S3 programmatically. */ @SuppressWarnings("unused") public class StudentCode extends SolutionCode { /** * Use the provided S3 client object to create the specified bucket. * Hint: Use the createBucket() method of the client object. * If the region is anything other than us-east-1, it needs to be * explicitly specified in the request. * * @param s3Client The S3 client object. * @param bucketName The name of the bucket to create. */ @Override public void createBucket(AmazonS3 s3Client, String bucketName, Region region) { //TODO: Replace this call to the super class with your own implementation of the method. if (!s3Client.doesBucketExist(bucketName)) s3Client.createBucket(bucketName, region.getName()); } /** * Upload the provided item to the specified bucket. * Hint: Use the putObject() method of the client object. * * @param s3Client The S3 client object. * @param bucketName The name of the target bucket. * @param sourceFile The name of the file to upload. * @param objectKey The key to assign to the new S3 object. */ @Override public void putObject(AmazonS3 s3Client, String bucketName, String sourceFile, String objectKey) { //TODO: Replace this call to the super class with your own implementation of the method. if (s3Client.doesBucketExist(bucketName)) { PutObjectResult result = s3Client.putObject(bucketName, objectKey, new File(sourceFile)); } else { System.out.println("The bucket you specified does not exist"); } } /** * List the contents of the specified bucket by writing the object key and item size to the console. * Hint: Use the listObjects() method of the client object. * * @param s3Client The S3 client object. * @param bucketName The name of the bucket containing the objects to list. */ @Override public void listObjects(AmazonS3 s3Client, String bucketName) { //TODO: Replace this call to the super class with your own implementation of the method. ObjectListing bucketObjects = s3Client.listObjects(bucketName); System.out.println(bucketObjects.getObjectSummaries()); } /** * Change the ACL for the specified object to make it publicly readable. * Hint: Call the setObjectAcl() method of the client object. Use the CannedAccessControlList * enumeration to set the ACL for the object to PublicRead. * * @param s3Client The S3 client object. * @param bucketName The name of the bucket containing the object. * @param key The key used to identify the object. */ @Override public void makeObjectPublic(AmazonS3 s3Client, String bucketName, String key) { //TODO: Replace this call to the super class with your own implementation of the method. s3Client.setObjectAcl(bucketName, key, CannedAccessControlList.PublicRead); } /** * Create and return a pre-signed URL for the specified item. Set the URL to expire one hour from the * moment it was generated. * Hint: Use the generatePresignedUrl() method of the client object. * * @param s3Client The S3 client object. * @param bucketName The name of the bucket containing the object. * @param key The key used to identify the object. * @return The pre-signed URL for the object. */ @Override public String generatePreSignedUrl(AmazonS3 s3Client, String bucketName, String key) { //TODO: Replace this call to the super class with your own implementation of the method. DateTime dt = new DateTime(); URL preSignedURL = s3Client.generatePresignedUrl(bucketName, key, dt.plusMinutes(30).toDate()); System.out.println(preSignedURL); return preSignedURL.toString(); } /** * Delete the specified bucket. You will use the deleteBucket() method of the client object to * delete the bucket, but first you will need to delete the bucket contents. To delete the contents, * you will need to list the objects and delete them individually (DeleteObject() method) or as a * batch (DeleteObjects() method). * * The purpose of this task is to gain experience writing applications that remove unused AWS resources * in an automated manner. * * @param s3Client The S3 client object. * @param bucketName The name of the bucket to delete. */ @Override public void deleteBucket(AmazonS3 s3Client, String bucketName) { //TODO: Replace this call to the super class with your own implementation of the method. List<Bucket> listing = s3Client.listBuckets(); if (listing.contains(bucketName)) { s3Client.deleteBucket(bucketName); } else { System.out.println("The specified bucket cannot be found to preform delete"); } } }