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");
}
}
/**
* This method should only be called if you can propagate the context id from another CallContext.
*
* @param callingUser calling user
* @param callingAccount calling account
* @param contextId context id propagated from another call context
* @return CallContext
*/
public static CallContext register(User callingUser, Account callingAccount, String contextId) {
/*
Unit tests will have multiple times of setup/tear-down call to this, remove assertions to all unit test to run
assert s_currentContext.get() == null : "There's a context already so what does this new register context mean? " + s_currentContext.get().toString();
if (s_currentContext.get() != null) { // FIXME: This should be removed soon. I added this check only to surface all the places that have this problem.
throw new CloudRuntimeException("There's a context already so what does this new register context mean? " + s_currentContext.get().toString());
}
*/
CallContext callingContext = new CallContext(callingUser, callingAccount, contextId);
s_currentContext.set(callingContext);
NDC.push("ctx-" + UuidUtils.first(contextId));
if (s_logger.isTraceEnabled()) {
s_logger.trace("Registered: " + callingContext);
}
s_currentContextStack.get().push(callingContext);
return callingContext;
}
public static CallContext current() {
return s_currentContext.get();
}