Here’s a link to download from my talk on JRuby and Threads.

If you just want the “exercises”, here they are:

Echo Server

• Listen on a port
• Respond to each request in a new Thread
• Extra Credit: Record stats on requests in a shared data structure

Connection Pool

• Allow N clients to access X shared instances of, say, Redis (where N > X)
• Clients “check out” a connection and get exclusive access
• Clients “check in” when done
• Instances get re-used