Example usage for com.amazonaws.services.s3.model S3ObjectSummary getKey

Introduction

In this page you can find the example usage for com.amazonaws.services.s3.model S3ObjectSummary getKey.

Prototype

public String getKey()

Source Link

Document

Gets the key under which this object is stored in Amazon S3.

Usage

From source file:thinkbig.util.Util.java

License:Open Source License

/**
 * returns (and prints) all (only non-empty objects if excludeBlanks is true) objects 
 * in an S3 bucket as list of Strings//from   w w w .j a  v  a  2  s .co  m
 * null if no such bucket exists
 * @param s3
 * @param bucketName
 * @param excludeBlanks
 * @return
 */
public static List<String> getAllObjectKeysInBucket(AmazonS3 s3, String bucketName, boolean excludeBlanks) {

    // check if the client is valid
    if (s3 == null) {
        System.out.println("Not a valid S3 Client");
        return null;
    }
    // check if the bucket exists
    if (!s3.doesBucketExist(bucketName)) {
        System.out.println("The bucket '" + bucketName + "' does not exist!");
        return null;
    }
    System.out.println("Listing objects in bucket '" + bucketName + "' ");
    ObjectListing objectListing = s3.listObjects(new ListObjectsRequest().withBucketName(bucketName));
    if (objectListing == null) {
        return null;
    }
    List<String> objectKeys = new ArrayList<String>();
    for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
        String key = objectSummary.getKey();
        if (!excludeBlanks || objectSummary.getSize() > 0) {
            objectKeys.add(key);
            System.out.println(" - " + key + "  " + "(size = " + objectSummary.getSize() + ")");
        }
    }
    return objectKeys;
}

From source file:updaters.S3FeedStorer.java

License:Open Source License

/**
 * Get all the feeds in S3.//from   www .jav  a2 s . com
 */
public List<String> getFeedIds() {
    List<String> feedIds = new ArrayList<String>();
    List<S3ObjectSummary> summaries;

    ObjectListing listing = this.s3Client.listObjects(this.bucket);
    summaries = listing.getObjectSummaries();

    for (S3ObjectSummary summary : summaries) {
        feedIds.add(summary.getKey());
    }

    while (listing.isTruncated()) {
        listing = this.s3Client.listNextBatchOfObjects(listing);
        summaries = listing.getObjectSummaries();

        for (S3ObjectSummary summary : summaries) {
            feedIds.add(summary.getKey());
        }
    }

    return feedIds;
}

From source file:yn.aws.S3Sample.java

License:Open Source License

public static void main(String[] args) throws IOException {
    /*//from  w  w  w .j  a  va  2s. c om
     * This credentials provider implementation loads your AWS credentials
     * from a properties file at the root of your classpath.
     * 
     * Important: Be sure to fill in your AWS access credentials in the
     *            AwsCredentials.properties file before you try to run this
     *            sample.
     * http://aws.amazon.com/security-credentials
     */
    AmazonS3 s3 = new AmazonS3Client(new ClasspathPropertiesFileCredentialsProvider());

    String bucketName = "my-first-s3-bucket-" + UUID.randomUUID();
    String key = "MyObjectKey";

    System.out.println("===========================================");
    System.out.println("Getting Started with Amazon S3");
    System.out.println("===========================================\n");

    try {
        /*
         * Create a new S3 bucket - Amazon S3 bucket names are globally unique,
         * so once a bucket name has been taken by any user, you can't create
         * another bucket with that same name.
         *
         * You can optionally specify a location for your bucket if you want to
         * keep your data closer to your applications or users.
         */
        System.out.println("Creating bucket " + bucketName + "\n");
        s3.createBucket(bucketName);

        /*
         * List the buckets in your account
         */
        System.out.println("Listing buckets");
        for (Bucket bucket : s3.listBuckets()) {
            System.out.println(" - " + bucket.getName());
        }
        System.out.println();

        /*
         * Upload an object to your bucket - You can easily upload a file to
         * S3, or upload directly an InputStream if you know the length of
         * the data in the stream. You can also specify your own metadata
         * when uploading to S3, which allows you set a variety of options
         * like content-type and content-encoding, plus additional metadata
         * specific to your applications.
         */
        System.out.println("Uploading a new object to S3 from a file\n");
        s3.putObject(new PutObjectRequest(bucketName, key, createSampleFile()));

        /*
         * Download an object - When you download an object, you get all of
         * the object's metadata and a stream from which to read the contents.
         * It's important to read the contents of the stream as quickly as
         * possibly since the data is streamed directly from Amazon S3 and your
         * network connection will remain open until you read all the data or
         * close the input stream.
         *
         * GetObjectRequest also supports several other options, including
         * conditional downloading of objects based on modification times,
         * ETags, and selectively downloading a range of an object.
         */
        System.out.println("Downloading an object");
        S3Object object = s3.getObject(new GetObjectRequest(bucketName, key));
        System.out.println("Content-Type: " + object.getObjectMetadata().getContentType());
        displayTextInputStream(object.getObjectContent());

        /*
         * List objects in your bucket by prefix - There are many options for
         * listing the objects in your bucket.  Keep in mind that buckets with
         * many objects might truncate their results when listing their objects,
         * so be sure to check if the returned object listing is truncated, and
         * use the AmazonS3.listNextBatchOfObjects(...) operation to retrieve
         * additional results.
         */
        System.out.println("Listing objects");
        ObjectListing objectListing = s3
                .listObjects(new ListObjectsRequest().withBucketName(bucketName).withPrefix("My"));
        for (S3ObjectSummary objectSummary : objectListing.getObjectSummaries()) {
            System.out.println(
                    " - " + objectSummary.getKey() + "  " + "(size = " + objectSummary.getSize() + ")");
        }
        System.out.println();

        /*
         * Delete an object - Unless versioning has been turned on for your bucket,
         * there is no way to undelete an object, so use caution when deleting objects.
         */
        System.out.println("Deleting an object\n");
        s3.deleteObject(bucketName, key);

        /*
         * Delete a bucket - A bucket must be completely empty before it can be
         * deleted, so remember to delete any objects from your buckets before
         * you try to delete them.
         */
        System.out.println("Deleting bucket " + bucketName + "\n");
        s3.deleteBucket(bucketName);
    } 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.");
        System.out.println("Error Message:    " + ase.getMessage());
        System.out.println("HTTP Status Code: " + ase.getStatusCode());
        System.out.println("AWS Error Code:   " + ase.getErrorCode());
        System.out.println("Error Type:       " + ase.getErrorType());
        System.out.println("Request ID:       " + ase.getRequestId());
    } catch (AmazonClientException ace) {
        System.out.println("Caught an AmazonClientException, which means the client encountered "
                + "a serious internal problem while trying to communicate with S3, "
                + "such as not being able to access the network.");
        System.out.println("Error Message: " + ace.getMessage());
    }
}