/**
* Setup the cell diagnostic context of the calling thread. Threads created from the calling
* thread automatically inherit this information. The old diagnostic context is captured and
* returned.
*/
public static CDC reset(String cellName, String domainName) {
CDC cdc = new CDC();
setMdc(MDC_CELL, cellName);
setMdc(MDC_DOMAIN, domainName);
MDC.remove(MDC_SESSION);
NDC.clear();
return cdc;
}
private void apply() {
setMdc(MDC_DOMAIN, _domain);
setMdc(MDC_CELL, _cell);
setMdc(MDC_SESSION, _session);
if (_ndc == null) {
NDC.clear();
} else {
NDC.set(_ndc);
}
}
/** Execute the given runnable within the context of this CDC. */
public void execute(Runnable r) {
String session = MDC.get(MDC_SESSION);
String cell = MDC.get(MDC_CELL);
String domain = MDC.get(MDC_DOMAIN);
NDC ndc = NDC.cloneNdc();
try {
apply();
r.run();
} finally {
setMdc(MDC_DOMAIN, domain);
setMdc(MDC_CELL, cell);
setMdc(MDC_SESSION, session);
NDC.set(ndc);
}
}
/**
* Setup message related diagnostic context for the calling thread. Adds information about a
* message to the MDC and NDC.
*
* @see clearMessageContext
*/
public static void setMessageContext(CellMessage envelope) {
Object session = envelope.getSession();
NDC.push(getMessageContext(envelope));
setMdc(MDC_SESSION, (session == null) ? null : session.toString());
}
/**
* Sets the session in the MDC for the calling thread.
*
* @param session Session identifier.
*/
public static void setSession(String session) {
setMdc(MDC_SESSION, session);
}