Question: How can I keep SFTP connection active between AJAX calls? about fun_sftp HOT 5 CLOSED

@crysper,

So, global variables in general are known to cause some issues when used in a multi-threaded environment. A thread-safe way may be to just reinitialize the connection when used in the code.

For example, each time reinitialize the connection like such:

conn = SFTPClient.new(server, username, password)
# the `.new` above should achieve that

Do you see any problems doing it this way? If you need additional help, please paste some sample code and I'd be glad to take a look and make any further suggestions.

Thanks,
George

from fun_sftp.

Thanks for the reply.

The issue is speed and connection management. Each of our users has a SFTP account linked and can connect to their server. For example if they need to upload 20 items, it may require a more than 3 new SFTP connections initalizations in a multi-threaded environment, which takes a long time. It's also hard to disconnect all of them when there are multiple connections in different threads.

from fun_sftp.

Okay. This may be a more general ruby thing to solve . I haven't heard issues around this gem just yet around speed / connection issues. I'm glad you're bringing it up though.

The fun-sftp gem is a wrapper around Ruby's Net::SFTP library. So, anything you can do here, should funnel down to this library: http://www.rubydoc.info/gems/net-sftp/2.0.5/Net/SFTP. If there's a feature you need added to this gem from that library, we can surely add if it helps.

As for your use case, the fact that it worked in a single-threaded environment how you wanted seems promising and is now just a matter of figuring out for a multi-threaded environment, correct?

So, perhaps sharing information across threads is what you need? It's hard for me to truly understand the problem at whole without some kind of sample code -- here's a link that may help give you some inspiration with how folks used the ConnectionPool to spread connections: http://stackoverflow.com/questions/28113940/what-is-the-best-way-to-use-redis-in-a-multi-threaded-rails-environment-puma. Hope this helps.

from fun_sftp.

@crysper were you able to find a workaround? I can close this issue if you did.

from fun_sftp.

Closing due to no response.

from fun_sftp.