First commit

setup/e2mgr/E2Manager/controllers/e2t_controller.go

@@ -0,0 +1,115 @@
+//
+// Copyright 2019 AT&T Intellectual Property
+// Copyright 2019 Nokia
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+//  This source code is part of the near-RT RIC (RAN Intelligent Controller)
+//  platform project (RICP).
+
+
+package controllers
+
+import (
+	"e2mgr/e2managererrors"
+	"e2mgr/logger"
+	"e2mgr/models"
+	"e2mgr/providers/httpmsghandlerprovider"
+	"encoding/json"
+	"net/http"
+	"net/http/httputil"
+	"strings"
+)
+
+type IE2TController interface {
+	GetE2TInstances(writer http.ResponseWriter, r *http.Request)
+}
+
+type E2TController struct {
+	logger          *logger.Logger
+	handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider
+}
+
+func NewE2TController(logger *logger.Logger, handlerProvider *httpmsghandlerprovider.IncomingRequestHandlerProvider) *E2TController {
+	return &E2TController{
+		logger:          logger,
+		handlerProvider: handlerProvider,
+	}
+}
+
+func (c *E2TController) GetE2TInstances(writer http.ResponseWriter, r *http.Request) {
+	c.logger.Infof("[Client -> E2 Manager] #E2TController.GetE2TInstances - request: %v", c.prettifyRequest(r))
+	c.handleRequest(writer, &r.Header, httpmsghandlerprovider.GetE2TInstancesRequest, nil, false)
+}
+
+func (c *E2TController) handleRequest(writer http.ResponseWriter, header *http.Header, requestName httpmsghandlerprovider.IncomingRequest, request models.Request, validateHeader bool) {
+
+	handler, err := c.handlerProvider.GetHandler(requestName)
+
+	if err != nil {
+		c.handleErrorResponse(err, writer)
+		return
+	}
+
+	response, err := handler.Handle(request)
+
+	if err != nil {
+		c.handleErrorResponse(err, writer)
+		return
+	}
+
+	result, err := response.Marshal()
+
+	if err != nil {
+		c.handleErrorResponse(err, writer)
+		return
+	}
+
+	c.logger.Infof("[E2 Manager -> Client] #E2TController.handleRequest - response: %s", result)
+	writer.Header().Set("Content-Type", "application/json")
+	writer.Write(result)
+}
+
+func (c *E2TController) handleErrorResponse(err error, writer http.ResponseWriter) {
+
+	var errorResponseDetails models.ErrorResponse
+	var httpError int
+
+	if err != nil {
+		switch err.(type) {
+		case *e2managererrors.RnibDbError:
+			e2Error, _ := err.(*e2managererrors.RnibDbError)
+			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
+			httpError = http.StatusInternalServerError
+		default:
+			e2Error := e2managererrors.NewInternalError()
+			errorResponseDetails = models.ErrorResponse{Code: e2Error.Code, Message: e2Error.Message}
+			httpError = http.StatusInternalServerError
+		}
+	}
+
+	errorResponse, _ := json.Marshal(errorResponseDetails)
+
+	c.logger.Errorf("[E2 Manager -> Client] #E2TController.handleErrorResponse - http status: %d, error response: %+v", httpError, errorResponseDetails)
+
+	writer.Header().Set("Content-Type", "application/json")
+	writer.WriteHeader(httpError)
+	_, err = writer.Write(errorResponse)
+}
+
+func (c *E2TController) prettifyRequest(request *http.Request) string {
+	dump, _ := httputil.DumpRequest(request, true)
+	requestPrettyPrint := strings.Replace(string(dump), "\r\n", " ", -1)
+	return strings.Replace(requestPrettyPrint, "\n", "", -1)
+}