private String getQueryData() {

        IPentahoSession userSession = PentahoSessionHolder.getSession();
        IPluginManager pluginManager = PentahoSystem.get(IPluginManager.class, userSession);
        IContentGenerator cda;
        try {
            cda = pluginManager.getContentGenerator("cda", userSession);
        } catch (Exception e) {
            logger.error("Failed to acquire CDA plugin to query");
            return null;
        }

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        IOutputHandler outputHandler = new SimpleOutputHandler(outputStream, false);
        IParameterProvider requestParams = new SimpleParameterProvider(requestMap);
        Map<String,Object> pathMap = new HashMap<String,Object>();
        pathMap.put("path", "/doQuery");
        IParameterProvider pathParams = new SimpleParameterProvider(pathMap);
        Map<String, IParameterProvider> paramProvider = new HashMap<String, IParameterProvider>();
        paramProvider.put(IParameterProvider.SCOPE_REQUEST,requestParams);
        paramProvider.put("path",pathParams);

        try {
            cda.setSession(userSession);
            cda.setOutputHandler(outputHandler);
            cda.setParameterProviders(paramProvider);
            cda.createContent();
            return outputStream.toString();
        } catch (Exception e) {
            logger.error("Failed to execute query: " + e.toString());
            return null;
        }
    }