Provision in session maintenance

Is there any method available for the following scenario?

1. Connect to SFTP Server through sshj implementation and upload some files.
2. Next time we need to upload one file. It should use the existing session and upload the file.
The session created in first step should maintain for the particular time. The next upload files should just re-use the session. If there is no upload in the particular period, the session will be closed. The next upload should connect, authenticate and reuse the session.