public static CallContext unregister() {
CallContext context = s_currentContext.get();
if (context == null) {
return null;
}
s_currentContext.remove();
if (s_logger.isTraceEnabled()) {
s_logger.trace("Unregistered: " + context);
}
String contextId = context.getContextId();
String sessionIdOnStack = null;
String sessionIdPushedToNDC = "ctx-" + UuidUtils.first(contextId);
while ((sessionIdOnStack = NDC.pop()) != null) {
if (sessionIdPushedToNDC.equals(sessionIdOnStack)) {
break;
}
if (s_logger.isTraceEnabled()) {
s_logger.trace("Popping from NDC: " + contextId);
}
}
Stack<CallContext> stack = s_currentContextStack.get();
stack.pop();
if (!stack.isEmpty()) {
s_currentContext.set(stack.peek());
}
return context;
}
public static CallContext registerSystemCallContextOnceOnly() {
try {
CallContext context = s_currentContext.get();
if (context == null) {
return register(User.UID_SYSTEM, Account.ACCOUNT_ID_SYSTEM);
}
assert context.getCallingUserId() == User.UID_SYSTEM
: "You are calling a very specific method that registers a one time system context. This method is meant for background threads that does processing.";
return context;
} catch (Exception e) {
s_logger.fatal(
"Exiting the system because we're unable to register the system call context.", e);
System.exit(1);
throw new CloudRuntimeException("Should never hit this");
}
}
public static CallContext current() {
return s_currentContext.get();
}