Example usage for com.amazonaws.services.s3 AmazonS3 listObjectsV2

Introduction

In this page you can find the example usage for com.amazonaws.services.s3 AmazonS3 listObjectsV2.

Prototype

public ListObjectsV2Result listObjectsV2(ListObjectsV2Request listObjectsV2Request)
            throws SdkClientException, AmazonServiceException;

Source Link

Usage

From source file:oulib.aws.s3.S3Util.java

public static void generateTifDerivativesByS3Bucket(AmazonS3 s3client, S3BookInfo bookInfo) {

    String sourceBucketName = bookInfo.getBucketSourceName();
    String targetBucketName = bookInfo.getBucketTargetName();
    String bookName = bookInfo.getBookName();

    try {//from ww w  .  ja v a  2 s  .  c om

        // Every book has a folder in the target bucket:
        Map targetBucketKeyMap = S3Util.getBucketObjectKeyMap(targetBucketName, bookName, s3client);
        if (!S3Util.folderExitsts(bookName, targetBucketKeyMap)) {
            S3Util.createFolder(targetBucketName, bookName, s3client);
        }

        final ListObjectsV2Request req = new ListObjectsV2Request().withBucketName(sourceBucketName)
                .withPrefix(bookName + "/data/");
        ListObjectsV2Result result;

        do {
            result = s3client.listObjectsV2(req);

            for (S3ObjectSummary objectSummary : result.getObjectSummaries()) {
                String key = objectSummary.getKey();
                if (key.contains(".tif") && (key.contains("047") || key.contains("049") || key.contains("054"))
                        && !targetBucketKeyMap.containsKey(key + ".tif")) {
                    S3Object object = s3client.getObject(new GetObjectRequest(sourceBucketName, key));
                    System.out.println("Start to generate smaller tif image for the object " + key + "\n");
                    S3Util.generateSmallTiffWithTargetSize(s3client, object, targetBucketName,
                            bookInfo.getCompressionSize());
                    //                   S3Util.copyS3ObjectTiffMetadata(s3client, object, s3client.getObject(new GetObjectRequest(targetBucketName, key)), targetBucketName, key+".tif");
                    System.out.println("Finished to generate smaller tif image for the object " + key + "\n");
                    //                   break;
                }
            }
            System.out.println("Next Continuation Token : " + result.getNextContinuationToken() + "\n");
            req.setContinuationToken(result.getNextContinuationToken());
        } while (result.isTruncated() == true);

    } catch (AmazonServiceException ase) {
        System.out.println(
                "Caught an AmazonServiceException, which means your request made it to Amazon S3, but was rejected with an error response for some reason.\n");
        System.out.println("Error Message:    " + ase.getMessage() + "\n");
        System.out.println("HTTP Status Code: " + ase.getStatusCode() + "\n");
        System.out.println("AWS Error Code:   " + ase.getErrorCode() + "\n");
        System.out.println("Error Type:       " + ase.getErrorType() + "\n");
        System.out.println("Request ID:       " + ase.getRequestId() + "\n");
    } catch (AmazonClientException ace) {
        System.out.println(
                "Caught an AmazonClientException, which means the client encountered an internal error while trying to communicate with S3, \nsuch as not being able to access the network.\n");
        System.out.println("Error Message: " + ace.getMessage() + "\n");
    }
}

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