Good evening,
In a custom WebSocketServlet in Jetty 9.4.37.v20210219 I would like to
maintain Session objects in a shared data structure.
Is a static data structure like
public final static Map<Integer, Session> SESSIONS = new
ConcurrentHashMap<>();
a good choice for that?
I have a feeling it does not work reliably. Maybe Jetty starts several
Linux process and thus the static data structure is not shared among them?
Because in my custom WebSocketListener I have a code:
@Override
public void onWebSocketText(String str) {
// here the user is authenticated and mUid is found
Session oldSession = SESSIONS.put(mUid, mSession);
disconnect(oldSession);
}
private void disconnect(Session session) {
LOG.info("disconnect: session={}", session); // surprisingly often
session is null
try {
session.close();
session.disconnect();
} catch (Exception ex) {
// ignore
}
}
And often the old session printed by the above LOG is null, even though I
would expect it be non-null.
Best regards
Alex
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