Add E2 manager client and controller

[portal/ric-dashboard.git] / webapp-backend / src / main / java / org / oranosc / ric / portal / dash / controller / E2ManagerController.java

diff --git a/webapp-backend/src/main/java/org/oranosc/ric/portal/dash/controller/E2ManagerController.java b/webapp-backend/src/main/java/org/oranosc/ric/portal/dash/controller/E2ManagerController.java
new file mode 100644 (file)
index 0000000..c76d4aa
--- /dev/null
+++ b/webapp-backend/src/main/java/org/oranosc/ric/portal/dash/controller/E2ManagerController.java
@@ -0,0 +1,111 @@
+/*-
+ * ========================LICENSE_START=================================
+ * ORAN-OSC
+ * %%
+ * Copyright (C) 2019 AT&T Intellectual Property and 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.
+ * ========================LICENSE_END===================================
+ */
+package org.oranosc.ric.portal.dash.controller;
+
+import java.lang.invoke.MethodHandles;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.servlet.http.HttpServletResponse;
+
+import org.oranosc.ric.e2mgr.client.api.DefaultApi;
+import org.oranosc.ric.e2mgr.client.model.RanSetupRequest;
+import org.oranosc.ric.portal.dash.DashboardConstants;
+import org.oranosc.ric.portal.dash.model.SuccessTransport;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.MediaType;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestMethod;
+import org.springframework.web.bind.annotation.RestController;
+
+import io.swagger.annotations.ApiOperation;
+
+/**
+ * Provides methods to contact the E2 Manager.
+ * 
+ * As of this writing the E2 interface only supports setup connection and check
+ * health actions; it does not support query or close operations on existing
+ * connections. So this class mocks up some of that needed functionality.
+ */
+@Configuration
+@RestController
+@RequestMapping(value = DashboardConstants.ENDPOINT_PREFIX + "/e2mgr", produces = MediaType.APPLICATION_JSON_VALUE)
+public class E2ManagerController {
+
+       private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
+
+       @Autowired
+       private DefaultApi e2ManagerClient;
+
+       // Tracks the requests previously submitted.
+       // TODO remove when the E2 manager is extended.
+       private Set<RanSetupRequest> requests = new HashSet<>();
+
+       private void assertNotNull(Object o) {
+               if (o == null)
+                       throw new IllegalArgumentException("Null not permitted");
+       }
+
+       private void assertNotEmpty(String s) {
+               assertNotNull(s);
+               if (s.isEmpty())
+                       throw new IllegalArgumentException("Empty not permitted");
+       }
+
+       @ApiOperation(value = "Gets the health from the E2 manager, expressed as the response code.", response = String.class)
+       @RequestMapping(value = "/health", method = RequestMethod.GET)
+       public SuccessTransport getHealth() {
+               logger.debug("getHealth");
+               return new SuccessTransport();
+       }
+
+       @ApiOperation(value = "Gets the unique requests submitted to the E2 manager.", response = RanSetupRequest.class, responseContainer = "List")
+       @RequestMapping(value = "/setup", method = RequestMethod.GET)
+       public Iterable<RanSetupRequest> getRequests() {
+               logger.debug("getRequests");
+               return requests;
+       }
+
+       @ApiOperation(value = "Sets up a RAN connection via the E2 manager.")
+       @RequestMapping(value = "/setup", method = RequestMethod.POST)
+       public void setup(@RequestBody RanSetupRequest rsr, HttpServletResponse response) {
+               logger.debug("setup {}", rsr);
+               try {
+                       assertNotEmpty(rsr.getRanIp());
+                       assertNotEmpty(rsr.getRanName());
+                       assertNotNull(rsr.getRanPort());
+               } catch (Exception ex) {
+                       logger.error("Bad request", ex);
+                       response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+               }
+               try {
+                       requests.add(rsr);
+                       e2ManagerClient.setupRan(rsr);
+               } catch (Exception ex) {
+                       logger.error("Failed", ex);
+                       response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
+               }
+       }
+
+}