@Override
public Session createSession(
final HttpServerExchange serverExchange, final SessionConfig config) {
if (evictionQueue != null) {
if (expireOldestUnusedSessionOnMax) {
while (sessions.size() >= maxSize && !evictionQueue.isEmpty()) {
String key = evictionQueue.poll();
UndertowLogger.REQUEST_LOGGER.debugf("Removing session %s as max size has been hit", key);
SessionImpl toRemove = sessions.get(key);
if (toRemove != null) {
toRemove.invalidate(
null, SessionListener.SessionDestroyedReason.TIMEOUT); // todo: better reason
}
}
} else if (sessions.size() >= maxSize) {
if (statisticsEnabled) {
rejectedSessionCount.incrementAndGet();
}
throw UndertowMessages.MESSAGES.tooManySessions(maxSize);
}
}
if (config == null) {
throw UndertowMessages.MESSAGES.couldNotFindSessionCookieConfig();
}
String sessionID = config.findSessionId(serverExchange);
int count = 0;
while (sessionID == null) {
sessionID = sessionIdGenerator.createSessionId();
if (sessions.containsKey(sessionID)) {
sessionID = null;
}
if (count++ == 100) {
// this should never happen
// but we guard against pathalogical session id generators to prevent an infinite loop
throw UndertowMessages.MESSAGES.couldNotGenerateUniqueSessionId();
}
}
Object evictionToken;
if (evictionQueue != null) {
evictionToken = evictionQueue.offerLastAndReturnToken(sessionID);
} else {
evictionToken = null;
}
if (statisticsEnabled) {
createdSessionCount.incrementAndGet();
}
final SessionImpl session =
new SessionImpl(
this,
sessionID,
config,
serverExchange.getIoThread(),
serverExchange.getConnection().getWorker(),
evictionToken,
defaultSessionTimeout);
sessions.put(sessionID, session);
config.setSessionId(serverExchange, session.getId());
session.lastAccessed = System.currentTimeMillis();
session.bumpTimeout();
sessionListeners.sessionCreated(session, serverExchange);
serverExchange.putAttachment(NEW_SESSION, session);
return session;
}
