Hi all,
I am relatively new to concept of using SL4J and Apache Sling Commons Logging Framework in AEM.
I need to try and write a SlingFilter in AEM that puts a MDC Key say a uuid into the request chain and then in one of my OSGI Servlets - I need to be able to log the MDC Key out as the user progresses through the journey.
Is there a sample that I can refer to or a series of configuration steps that I can try out to achieve this?
To add specifics to above, I am using AEM 6.2 and in the felix console, I made a configuration as below:
Apache Sling Logger Logging Configuration:
Log Level: Debug
Log File: logs/project-myapp-name-debug.log
Message Pattern: %d{dd.MM.yyyy HH:mm:ss.SSS} *%p* [%X{UUID}] [%t] %c %msg%n
Logger: com.myappbrand.myapp-parent-package
Additiv : I left the checkbox as unchecked
---------------
Also in my Custom Sling Filter named LoggingFilter I have added these lines to add a UUID per request:
@SlingFilter(order = -700, scope = SlingFilterScope.REQUEST)
public class LoggingFilter implements Filter {
private final Logger logger = LoggerFactory.getLogger(getClass());
private static final String HEADERS_TO_TRY = "X-Forwarded-For";
@Override
public void doFilter(final ServletRequest request, final ServletResponse response,
final FilterChain filterChain) throws IOException, ServletException {
final SlingHttpServletRequest slingRequest = (SlingHttpServletRequest) request;
UUID uuidNo = java.util.UUID.randomUUID();
logger.debug("Adding UUID as: {}", uuidNo);
MDC.put("UUID", uuidNo.toString());
filterChain.doFilter(request, response);
}
@Override
public void init(FilterConfig filterConfig) {}
@Override
public void destroy() {}
}
My expectation was that once the above is done, I would see the UUID appear in all my application specific DEBUG log statements in configured log file, however the same does not happen.
Any pointers towards a probable reason or correction to my expected result are greatly appreciated.
Thanks,
Hemant
