Use UploadPart
with an AWS SDK
The following code example shows how to use UploadPart
.
- SDK for Java 2.x
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Note
There's more on GitHub. Find the complete example and learn how to set up and run in the AWS Code Examples Repository
. Upload part of a multipart upload for a directory bucket.
import org.slf4j.Logger; import org.slf4j.LoggerFactory; import software.amazon.awssdk.core.sync.RequestBody; import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.s3.S3Client; import software.amazon.awssdk.services.s3.model.CompletedPart; import software.amazon.awssdk.services.s3.model.S3Exception; import software.amazon.awssdk.services.s3.model.UploadPartRequest; import software.amazon.awssdk.services.s3.model.UploadPartResponse; import java.io.IOException; import java.io.RandomAccessFile; import java.nio.ByteBuffer; import java.nio.file.Path; import java.util.ArrayList; import java.util.List; import static com.example.s3.util.S3DirectoryBucketUtils.abortDirectoryBucketMultipartUploads; import static com.example.s3.util.S3DirectoryBucketUtils.createDirectoryBucket; import static com.example.s3.util.S3DirectoryBucketUtils.createDirectoryBucketMultipartUpload; import static com.example.s3.util.S3DirectoryBucketUtils.createS3Client; import static com.example.s3.util.S3DirectoryBucketUtils.deleteAllObjectsInDirectoryBucket; import static com.example.s3.util.S3DirectoryBucketUtils.deleteDirectoryBucket; import static com.example.s3.util.S3DirectoryBucketUtils.getFilePath; /** * This method creates part requests and uploads individual parts to S3. * While it uses the UploadPart API to upload a single part, it does so * sequentially to handle multiple parts of a file, returning all the completed * parts. * * @param s3Client The S3 client used to interact with S3 * @param bucketName The name of the directory bucket * @param objectKey The key (name) of the object to be uploaded * @param uploadId The upload ID used to track the multipart upload * @param filePath The path to the file to be uploaded * @return A list of uploaded parts * @throws IOException if an I/O error occurs */ public static List<CompletedPart> multipartUploadForDirectoryBucket(S3Client s3Client, String bucketName, String objectKey, String uploadId, Path filePath) throws IOException { logger.info("Uploading parts for object: {} in bucket: {}", objectKey, bucketName); int partNumber = 1; List<CompletedPart> uploadedParts = new ArrayList<>(); ByteBuffer bb = ByteBuffer.allocate(1024 * 1024 * 5); // 5 MB byte buffer // Read the local file, break down into chunks and process try (RandomAccessFile file = new RandomAccessFile(filePath.toFile(), "r")) { long fileSize = file.length(); int position = 0; // Sequentially upload parts of the file while (position < fileSize) { file.seek(position); int read = file.getChannel().read(bb); bb.flip(); // Swap position and limit before reading from the buffer UploadPartRequest uploadPartRequest = UploadPartRequest.builder() .bucket(bucketName) .key(objectKey) .uploadId(uploadId) .partNumber(partNumber) .build(); UploadPartResponse partResponse = s3Client.uploadPart( uploadPartRequest, RequestBody.fromByteBuffer(bb)); // Build the uploaded part CompletedPart uploadedPart = CompletedPart.builder() .partNumber(partNumber) .eTag(partResponse.eTag()) .build(); // Add the uploaded part to the list uploadedParts.add(uploadedPart); // Log to indicate the part upload is done logger.info("Uploaded part number: {} with ETag: {}", partNumber, partResponse.eTag()); bb.clear(); position += read; partNumber++; } } catch (S3Exception e) { logger.error("Failed to list parts: {} - Error code: {}", e.awsErrorDetails().errorMessage(), e.awsErrorDetails().errorCode()); throw e; } return uploadedParts; }
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For API details, see UploadPart in AWS SDK for Java 2.x API Reference.
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For a complete list of AWS SDK developer guides and code examples, see Developing with Amazon S3 using the AWS SDKs. This topic also includes information about getting started and details about previous SDK versions.