Parallec
Fast Parallel Async HTTP/SSH/TCP/UDP/Ping Client Java Library
... requests exceedingly easy. Input target hosts from list, string, text, json path, and cms query from local or URLs. Auto progress polling to handle async APIs such as "download packages" or "create compute", enabling task-level concurrency control and orchestration. Infinite scalability with flexible task-level concurrency control without creating 1,000 threads thread pools. Ping / HTTP 8,000 servers with response aggregation in 12 seconds.