Using the AWS Java SDK for Multipart Upload (High-Level API)
The AWS SDK for Java exposes a high-level API, called TransferManager, that
simplifies multipart uploads (see Uploading Objects Using Multipart Upload API). You can upload data from a file or a stream. You
can also set advanced options, such as the part size you want to use for the multipart
upload, or the number of concurrent threads you want to use when uploading the parts.
You
can also set optional object properties, the storage class, or the ACL. You use
the
PutObjectRequest and the TransferManagerConfiguration classes
to set these advanced options.
When possible, TransferManager attempts to use multiple threads to upload
multiple parts of a single upload at once. When dealing with large content sizes
and high
bandwidth, this can increase throughput significantly.
In addition to file-upload functionality, the TransferManager class enables
you to abort an in-progress multipart upload. An upload is considered to be in progress
after you initiate it and until you complete or abort it. The TransferManager
aborts all in-progress multipart uploads on a specified bucket that were initiated
before a
specified date and time.
For more information about multipart uploads, including additional functionality offered by the low-level API methods, see Uploading Objects Using Multipart Upload API.
