Initiates a complete multi-part upload request for a
TransferManager multi-part parallel upload.
The upload id associated with the multi-part upload.
The reference to underlying Amazon S3 client to be used for initiating
requests to Amazon S3.
The reference to the request initiated by the user.
The futures of threads that upload individual parts.
The eTags of the parts that had been successfully uploaded before
resuming a paused upload.
The monitor to which the upload progress has to be communicated.
Collects the Part ETags for initiating the complete multi-part upload
request. This is blocking as it waits until all the upload part threads
"Unable to complete multi-part upload. Individual part upload failed : "