@Override
protected JsonArray serve(String filter, int limit) {
JsonArray array = new JsonArray();
try {
AmazonS3 s3 = PersistS3.getClient();
filter = Strings.nullToEmpty(filter);
for( Bucket b : s3.listBuckets() ) {
if( b.getName().startsWith(filter) )
array.add(new JsonPrimitive(b.getName()));
if( array.size() == limit) break;
}
} catch( IllegalArgumentException _ ) { }
return array;
}
// 列出所有buckets
public static void listAllBuckets() {
List<Bucket> buckets = conn.listBuckets();
for (Bucket bucket : buckets) {
System.out.println(
bucket.getName() + "\t\t" + StringUtils.fromDate(bucket.getCreationDate()));
}
}
// 获取名为name的bucket
public static Bucket getBucketByName(String name) {
List<Bucket> buckets = conn.listBuckets();
for (Bucket bucket : buckets) {
if (bucket.getName().equalsIgnoreCase(name)) return bucket;
}
return null;
}
public static void createBucket(AmazonS3Client s3, String bucketName, String zone) {
try {
List<Bucket> bucketList = s3.listBuckets();
for (Bucket bucket : bucketList) {
// System.out.println(bucket.getName());
if (bucketName.equalsIgnoreCase(bucket.getName())) {
System.out.println("Using bucket " + bucketName);
return;
}
}
System.out.println("Created s3 bucket " + bucketName);
s3.createBucket(bucketName);
return;
} catch (AmazonServiceException ase) {
System.out.println("Caught Exception: " + ase.getMessage());
System.out.println("Reponse Status Code: " + ase.getStatusCode());
System.out.println("Error Code: " + ase.getErrorCode());
System.out.println("Request ID: " + ase.getRequestId());
}
}
// 列出某个bucket的所有objects
public static void listObjectInBucket(Bucket bucket) {
List<Bucket> buckets = conn.listBuckets();
ObjectListing objects = conn.listObjects(bucket.getName());
do {
for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) {
System.out.println(
objectSummary.getKey()
+ "\t"
+ objectSummary.getSize()
+ "\t"
+ StringUtils.fromDate(objectSummary.getLastModified()));
}
objects = conn.listNextBatchOfObjects(objects);
} while (objects.isTruncated());
}
// 列出有prefix前缀的所有objects
public static void listObjectInBucketWithPrefix(Bucket bucket, String prefix) {
ListObjectsRequest listObjectsRequest =
new ListObjectsRequest().withBucketName(bucket.getName()).withPrefix(prefix);
ObjectListing objects = conn.listObjects(listObjectsRequest);
do {
for (S3ObjectSummary objectSummary : objects.getObjectSummaries()) {
System.out.println(
objectSummary.getKey()
+ "\t"
+ objectSummary.getSize()
+ "\t"
+ StringUtils.fromDate(objectSummary.getLastModified()));
}
objects = conn.listNextBatchOfObjects(objects);
} while (objects.isTruncated());
}
public static void main(String[] args) throws Exception {
System.out.println("===========================================");
System.out.println("Welcome to the AWS Java SDK!");
System.out.println("===========================================");
init();
try {
/*
* The Amazon EC2 client allows you to easily launch and configure
* computing capacity in AWS datacenters.
*
* In this sample, we use the EC2 client to list the availability zones
* in a region, and then list the instances running in those zones.
*/
DescribeAvailabilityZonesResult availabilityZonesResult = ec2.describeAvailabilityZones();
List<AvailabilityZone> availabilityZones = availabilityZonesResult.getAvailabilityZones();
System.out.println("You have access to " + availabilityZones.size() + " availability zones:");
for (AvailabilityZone zone : availabilityZones) {
System.out.println(" - " + zone.getZoneName() + " (" + zone.getRegionName() + ")");
}
DescribeInstancesResult describeInstancesResult = ec2.describeInstances();
Set<Instance> instances = new HashSet<Instance>();
for (Reservation reservation : describeInstancesResult.getReservations()) {
instances.addAll(reservation.getInstances());
}
System.out.println("You have " + instances.size() + " Amazon EC2 instance(s) running.");
/*
* The Amazon S3 client allows you to manage and configure buckets
* and to upload and download data.
*
* In this sample, we use the S3 client to list all the buckets in
* your account, and then iterate over the object metadata for all
* objects in one bucket to calculate the total object count and
* space usage for that one bucket. Note that this sample only
* retrieves the object's metadata and doesn't actually download the
* object's content.
*
* In addition to the low-level Amazon S3 client in the SDK, there
* is also a high-level TransferManager API that provides
* asynchronous management of uploads and downloads with an easy to
* use API:
* http://docs.aws.amazon.com/AWSJavaSDK/latest/javadoc/com/amazonaws/services/s3/transfer/TransferManager.html
*/
List<Bucket> buckets = s3.listBuckets();
System.out.println("You have " + buckets.size() + " Amazon S3 bucket(s).");
if (buckets.size() > 0) {
Bucket bucket = buckets.get(0);
long totalSize = 0;
long totalItems = 0;
/*
* The S3Objects and S3Versions classes provide convenient APIs
* for iterating over the contents of your buckets, without
* having to manually deal with response pagination.
*/
for (S3ObjectSummary objectSummary : S3Objects.inBucket(s3, bucket.getName())) {
totalSize += objectSummary.getSize();
totalItems++;
}
System.out.println(
"The bucket '"
+ bucket.getName()
+ "' contains "
+ totalItems
+ " objects "
+ "with a total size of "
+ totalSize
+ " bytes.");
}
} catch (AmazonServiceException ase) {
/*
* AmazonServiceExceptions represent an error response from an AWS
* services, i.e. your request made it to AWS, but the AWS service
* either found it invalid or encountered an error trying to execute
* it.
*/
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) {
/*
* AmazonClientExceptions represent an error that occurred inside
* the client on the local host, either while trying to send the
* request to AWS or interpret the response. For example, if no
* network connection is available, the client won't be able to
* connect to AWS to execute a request and will throw an
* AmazonClientException.
*/
System.out.println("Error Message: " + ace.getMessage());
}
}
public static void main(String[] args) throws IOException {
/*
* 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());
}
}
// 将文件f放到bucket中，名为name； 权限为公共读写。
public static void putObjectInBucket(Bucket bucket, String name, File f) {
conn.putObject(bucket.getName(), name, f);
conn.setObjectAcl(bucket.getName(), name, CannedAccessControlList.PublicReadWrite);
}
// 获取bucket中名为name的object的下载地址
public static URL genarateUrlInBucketForObject(Bucket bucket, String name) {
GeneratePresignedUrlRequest request = new GeneratePresignedUrlRequest(bucket.getName(), name);
// System.out.println(conn.generatePresignedUrl(request));
return conn.generatePresignedUrl(request);
}
// 从bucket中删除名为name的object
public static void delObjectFromBucket(Bucket bucket, String name) {
conn.deleteObject(bucket.getName(), name);
}
// 从bucket中下载object name，并放在"/home/zforCeph/download"文件夹下
public static void getObjectFromBucket(Bucket bucket, String path, String name) {
conn.getObject(new GetObjectRequest(bucket.getName(), name), new File(path + name));
}