code: public Object execute(TargetMetaDef targetMetaDef, MethodMetaArgs methodMetaArgs, AppContextWrapper acw) throws Exception {
  		Debug.logVerbose("[JdonFramework]enter service execution core ", module);
  		userTargetMetaDefFactory.createTargetMetaRequest(targetMetaDef, acw);
  		TargetMetaRequest targetMetaRequest = userTargetMetaDefFactory.targetMetaRequestsHolder.getTargetMetaRequest();
  		targetMetaRequest.setMethodMetaArgs(methodMetaArgs);
  		return webServiceAccessor.execute();
  	}
docs: running the service, and return the result