Here's my suggestion on graceful shutdown. 1) Modify your I/O Handler (or ProtocolHandler) to maintain the list of connected sessions. sessionOpened() and sessionClosed() would be the best place to do this. 2) Unbind the service so there cannot be more new sessions. The existing sessions will not be disconnected at this moment. 3) Close all sessions in the list you've been maintaining at step (1).
Regarding the timeout stuff, it depends on the contract between clients and a server, so the implementation can change depending on it. My suggestion is just to close the sessions immediately because a server that takes minutes to shut itself down makes administrators unhappy. HTH, Trustin On 8/6/06, Hanson Char <[EMAIL PROTECTED]> wrote:
Hi, I am interested in your thoughts and suggestions in implementing a graceful shutdown of a Mina server. Please read below for details. Hanson Char Implementing Graceful Shutdown ======================== We have a server implemented in Mina 0.8.2, and are thinking of implementing a graceful shutdown of the server upon certain event (such as trapping a SIGINT or SIGTERM). The shutdown basically needs to: 1) stop any new connection from being made, and 2) closes all existing open sessions; For (2), however, I am thinking instead of closing the outstanding open sessions immediately, maybe a better approach would be to wait for the existing write's to finish prior to closing the sessions ? Specifically, for each existing open session, 1) check if it is idle and if so close the session immediately; 2) if not, wait for up to 10 seconds (or whatever timeout parameter), or until it's idle, then close the session; Thoughts ? Suggestions ? Thanks in advance.
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