4.0.0 cornerstone-connection-api cornerstone-connection-api Cornerstone Connection API 2.1 2001 cornerstone-sockets cornerstone-sockets-api 2.1 cornerstone-threads cornerstone-threads-api 2.1 avalon-framework avalon-framework-api 4.3 excalibur-pool excalibur-pool-api 2.1 excalibur-thread excalibur-thread-api 2.1