I am trying to implement implement pause and resume mechanism for Amazon S3 SDK.
I am using TransferManager to start download and to resume it like the given example in the link
There is a problem with downloadInstance.pause() method.
It does not pause the download like in the uploadInstance.tryPause(true)
I have attached ProgressListener to downloadInstance like following:
TransferProgress progress = myDownload.getProgress();
I have tried to pause progress like following:
PersistableDownload persistableDownload = myDownload.pause();
After this point I have checked progress instance and see the progress changed in debug. So I can say that it is not pausing download operation as intended.
To resume the download from the persistableDownload instance, I have tried the following:
Download resumedDownload = transferManager.resumeDownload(persistableDownload);
I have also attached different TransferProgress instance to resumeDownload instance and I have seen that it is starting from beginning instead of resuming.
I have found the root cause of the problem. S3 is allowing parallel downloads as default and it is not possible to resume download if it is parallel downloaded as parts.