Lindorm:Use Amazon S3 API for Java to develop applications

Create a connection.

String s3Endpoint = "http://ld-bp17j28j2y7pm****-proxy-blob.lindorm.rds.aliyuncs.com:9053"; // Specify the endpoint that is required to connect to LindormTable by using the S3 protocol.
String bucketName = "testbucket";

// Establish a connection.
AmazonS3 client = AmazonS3ClientBuilder.standard()
        .withEndpointConfiguration(new AwsClientBuilder.EndpointConfiguration(s3Endpoint, null))
        .withPathStyleAccessEnabled(true)
        .withCredentials(new AWSStaticCredentialsProvider(new BasicAWSCredentials("AK", "SK")))
        .build();

Perform operations on buckets.

// Create a bucket.
Bucket bucket = client.createBucket(bucketName);

// Check whether the bucket exists.
HeadBucketResult result = client.headBucket(new HeadBucketRequest(bucketName));

// List all buckets.
List<Bucket> buckets = client.listBuckets(new ListBucketsRequest());

Perform operations on objects.

String content = "content";
// Upload an object.
client.putObject(bucketName, key_name, content);

// Read data from an object.
S3Object object = client.getObject(bucketName, keyName);

// List all objects in a bucket.
// list v1
ObjectListing objects = client.listObjects(bucketName);
// list v2
ListObjectsV2Result results = client.listObjectsV2(bucketName);

// Delete an object.
client.deleteObject(bucketName, keyName);

// Delete multiple objects at a time.
client.deleteObjects(new DeleteObjectsRequest(bucketName).withKeys(keyName));

Perform a multipart upload task.

// Configure the file that you want to upload.
File file = new File(filePath);
long contentLength = file.length();
long partSize = 5 * 1024 * 1024; // Set the size of each part to 5 MB.

List<PartETag> partETags = new ArrayList<PartETag>();

// Initialize the multipart upload task.
InitiateMultipartUploadRequest initRequest = new InitiateMultipartUploadRequest(bucketName, keyName);
InitiateMultipartUploadResult initResponse = client.initiateMultipartUpload(initRequest);

// Upload parts.
long filePosition = 0;
for (int i = 1; filePosition < contentLength; i++) {
    partSize = Math.min(partSize, (contentLength - filePosition));

    // Send the multipart upload request.
    UploadPartRequest uploadRequest = new UploadPartRequest()
        .withBucketName(bucketName)
        .withKey(keyName)
        .withUploadId(initResponse.getUploadId())
        .withPartNumber(i)
        .withFileOffset(filePosition)
        .withFile(file)
        .withPartSize(partSize);

    UploadPartResult uploadResult = client.uploadPart(uploadRequest);
    partETags.add(uploadResult.getPartETag());

    filePosition += partSize;
}

// Complete the multipart upload task. After the task is complete, the object is visible.
CompleteMultipartUploadRequest compRequest = new CompleteMultipartUploadRequest(bucketName, keyName,
                                                                                initResponse.getUploadId(), partETags);
client.completeMultipartUpload(compRequest);

Create a connection.

String s3Endpoint = "http://ld-bp17j28j2y7pm****-proxy-blob.lindorm.rds.aliyuncs.com:9053"; // Specify the endpoint that is required to connect to LindormTable by using the S3 protocol.
String bucketName = "testbucket";

// Create a connection.
AwsBasicCredentials creds = AwsBasicCredentials.create("AK", "SK");

S3Client client = S3Client.builder()
    .serviceConfiguration(b -> b.checksumValidationEnabled(false))
    .region(Region.AP_EAST_1)
    .credentialsProvider(StaticCredentialsProvider.create(creds))
    .endpointOverride(new URI(s3Endpoint))
    .build();

// Close the connection.
client.close();

Perform operations on buckets.

// Create a bucket.
S3Waiter s3Waiter = client.waiter();
CreateBucketRequest bucketRequest = CreateBucketRequest.builder()
    .bucket(bucketName)
    .build();

// Check whether the bucket exists.
client.createBucket(bucketRequest);
HeadBucketRequest bucketRequestWait = HeadBucketRequest.builder()
    .bucket(bucketName)
    .build();

WaiterResponse<HeadBucketResponse> waiterResponse = s3Waiter.waitUntilBucketExists(bucketRequestWait);
waiterResponse.matched().response().ifPresent(System.out::println);

Perform operations on objects.

// Write data to an object.
PutObjectRequest putOb = PutObjectRequest.builder()
        .bucket(bucketName)
        .key(keyName)
        .build();

PutObjectResponse response = client.putObject(putOb,
        RequestBody.fromString("content"));

// Read data from an object.
GetObjectRequest objectRequest = GetObjectRequest
        .builder()
        .key(keyName)
        .bucket(bucketName)
        .build();

ResponseBytes<GetObjectResponse> objectBytes = client.getObjectAsBytes(objectRequest);
    byte[] data = objectBytes.asByteArray();

// List objects.
ListObjectsRequest listObjects = ListObjectsRequest
                    .builder()
                    .bucket(bucketName)
                    .build();

ListObjectsResponse res = client.listObjects(listObjects);
List<S3Object> objects = res.contents();

Perform a multipart upload task.

// Initialize the multipart upload task.
CreateMultipartUploadRequest createMultipartUploadRequest = CreateMultipartUploadRequest.builder()
    .bucket(bucketName)
    .key(keyName)
    .build();

CreateMultipartUploadResponse response = client.createMultipartUpload(createMultipartUploadRequest);
String uploadId = response.uploadId();
System.out.println(uploadId);

// Upload part 1 of the object.
UploadPartRequest uploadPartRequest1 = UploadPartRequest.builder().bucket(bucketName).key(keyName)
    .uploadId(uploadId)
    .partNumber(1).build();
String etag1 = client.uploadPart(uploadPartRequest1, RequestBody.fromString("content1")).eTag();
CompletedPart part1 = CompletedPart.builder().partNumber(1).eTag(etag1).build();

// Upload part 2 of the object.
UploadPartRequest uploadPartRequest2 = UploadPartRequest.builder().bucket(bucketName).key(keyName)
    .uploadId(uploadId)
    .partNumber(2).build();
String etag2 = client.uploadPart(uploadPartRequest2, RequestBody.fromString("content2")).eTag();
CompletedPart part2 = CompletedPart.builder().partNumber(2).eTag(etag2).build();

// Complete the multipart upload task. After the task is complete, the object is visible.
CompletedMultipartUpload completedMultipartUpload = CompletedMultipartUpload.builder()
    .parts(part1, part2)
    .build();

CompleteMultipartUploadRequest completeMultipartUploadRequest =
    CompleteMultipartUploadRequest.builder()
    .bucket(bucketName)
    .key(keyName)
    .uploadId(uploadId)
    .multipartUpload(completedMultipartUpload)
    .build();

client.completeMultipartUpload(completeMultipartUploadRequest);