code: @Override
  	public void filter(final ContainerRequestContext containerRequestContext) {
  
  		if (backend.getConfiguration().shouldProcessContext(IncomingRequest)) {
  			final List<String> serializedTraceeHeaders = containerRequestContext.getHeaders().get(TraceeConstants.TPIC_HEADER);
  			if (serializedTraceeHeaders != null && !serializedTraceeHeaders.isEmpty()) {
  				final Map<String, String> parsed = transportSerialization.parse(serializedTraceeHeaders);
  				backend.putAll(backend.getConfiguration().filterDeniedParams(parsed, IncomingRequest));
  			}
  		}
  
  		Utilities.generateInvocationIdIfNecessary(backend);
  	}
docs: This method handles the incoming request