private static void logStartupBanner(Server server) {
  Object banner = null;

  ContextHandler contextHandler = server.getChildHandlerByClass(ContextHandler.class);
  if (contextHandler != null) {
    Context context = contextHandler.getServletContext();
    if (context != null) {
      banner = context.getAttribute("nexus-banner");
    }
  }

  StringBuilder buf = new StringBuilder();
  buf.append("\n-------------------------------------------------\n\n");
  buf.append("Started ").append(banner instanceof String ? banner : "Nexus Repository Manager");
  buf.append("\n\n-------------------------------------------------");
  log.info(buf.toString());
}
 

@Override
public void enterScope(Context context, Request request, Object reason) {
  if (logger.isLoggable(Level.FINE)) {
    logger.fine("enterScope " + context);
  }
  if (request != null) {
    Integer depth = contextDepth.get();
    if (depth == null || depth.intValue() == 0) {
      contextDepth.set(1);
      String currentTraceId = (String) request.getAttribute(X_CLOUD_TRACE);
      if (currentTraceId == null) {
        // extract xCloud Trace in format: TRACE_ID/SPAN_ID;o=TRACE_TRUE
        String cloudTrace = request.getHeader(X_CLOUD_TRACE);
        if (cloudTrace != null) {
          int split = cloudTrace.indexOf('/');
          if (split < 0) {
            split = cloudTrace.indexOf(';');
          }
          String traceId = split >= 0 ? cloudTrace.substring(0, split) : cloudTrace;
          if (traceId != null) {
            currentTraceId = String.format("projects/%s/traces/%s", projectId, traceId);
            request.setAttribute(X_CLOUD_TRACE, currentTraceId);
            TraceLoggingEnhancer.setCurrentTraceId(currentTraceId);
          }
        }
      }
    } else {
      contextDepth.set(depth + 1);
    }
  }
}
 

@Override
public void exitScope(Context context, Request request) {
  if (logger.isLoggable(Level.FINE)) {
    logger.fine("exitScope " + context);
  }
  Integer depth = contextDepth.get();
  if (depth != null) {
    if (depth > 1) {
      contextDepth.set(depth - 1);
    } else {
      contextDepth.remove();
      TraceLoggingEnhancer.setCurrentTraceId(null);
    }
  }
}