webapp-backend/src/main/java/org/oransc/ric/portal/dashboard/controller/E2ManagerController.java

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  * %%
   5  * Copyright (C) 2019 AT&T Intellectual Property and Nokia
   6  * %%
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  * ========================LICENSE_END===================================
  19  */
  20 package org.oransc.ric.portal.dashboard.controller;
  21
  22 import java.lang.invoke.MethodHandles;
  23 import java.util.HashSet;
  24 import java.util.Set;
  25
  26 import javax.servlet.http.HttpServletResponse;
  27
  28 import org.oransc.ric.e2mgr.client.api.HealthCheckApi;
  29 import org.oransc.ric.e2mgr.client.api.NodebApi;
  30 import org.oransc.ric.e2mgr.client.model.GetNodebResponse;
  31 import org.oransc.ric.e2mgr.client.model.SetupRequest;
  32 import org.oransc.ric.portal.dashboard.DashboardApplication;
  33 import org.oransc.ric.portal.dashboard.DashboardConstants;
  34 import org.oransc.ric.portal.dashboard.model.E2SetupRequestType;
  35 import org.oransc.ric.portal.dashboard.model.E2SetupResponse;
  36 import org.oransc.ric.portal.dashboard.model.SuccessTransport;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39 import org.springframework.beans.factory.annotation.Autowired;
  40 import org.springframework.context.annotation.Configuration;
  41 import org.springframework.http.MediaType;
  42 import org.springframework.http.ResponseEntity;
  43 import org.springframework.util.Assert;
  44 import org.springframework.web.bind.annotation.PathVariable;
  45 import org.springframework.web.bind.annotation.RequestBody;
  46 import org.springframework.web.bind.annotation.RequestMapping;
  47 import org.springframework.web.bind.annotation.RequestMethod;
  48 import org.springframework.web.bind.annotation.RestController;
  49 import org.springframework.web.client.HttpStatusCodeException;
  50
  51 import io.swagger.annotations.ApiOperation;
  52
  53 /**
  54  * Proxies calls from the front end to the E2 Manager API. All methods answer
  55  * 502 on failure: <blockquote>HTTP server received an invalid response from a
  56  * server it consulted when acting as a proxy or gateway.</blockquote>
  57  *
  58  * As of this writing the E2 interface does not support get-all, so this class
  59  * mocks up some of that functionality.
  60  */
  61 @Configuration
  62 @RestController
  63 @RequestMapping(value = DashboardConstants.ENDPOINT_PREFIX + "/e2mgr", produces = MediaType.APPLICATION_JSON_VALUE)
  64 public class E2ManagerController {
  65
  66         private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  67
  68         // Path parameters
  69         private static final String PP_RANNAME = "ranName";
  70
  71         // Populated by the autowired constructor
  72         private final HealthCheckApi e2HealthCheckApi;
  73         private final NodebApi e2NodebApi;
  74
  75         // Stores the requests and results.
  76         // TODO remove when the E2 manager is extended.
  77         private Set<E2SetupResponse> responses = new HashSet<>();
  78
  79         @Autowired
  80         public E2ManagerController(final HealthCheckApi e2HealthCheckApi, final NodebApi e2NodebApi) {
  81                 Assert.notNull(e2HealthCheckApi, "API must not be null");
  82                 Assert.notNull(e2NodebApi, "API must not be null");
  83                 this.e2HealthCheckApi = e2HealthCheckApi;
  84                 this.e2NodebApi = e2NodebApi;
  85         }
  86
  87         private void assertNotNull(Object o) {
  88                 if (o == null)
  89                         throw new IllegalArgumentException("Null not permitted");
  90         }
  91
  92         private void assertNotEmpty(String s) {
  93                 assertNotNull(s);
  94                 if (s.isEmpty())
  95                         throw new IllegalArgumentException("Empty not permitted");
  96         }
  97
  98         @ApiOperation(value = "Gets the E2 manager client library MANIFEST.MF property Implementation-Version.", response = SuccessTransport.class)
  99         @RequestMapping(value = DashboardConstants.VERSION_PATH, method = RequestMethod.GET)
 100         public SuccessTransport getE2ManagerClientVersion() {
 101                 return new SuccessTransport(200, DashboardApplication.getImplementationVersion(HealthCheckApi.class));
 102         }
 103
 104         @ApiOperation(value = "Gets the health from the E2 manager, expressed as the response code.")
 105         @RequestMapping(value = "/health", method = RequestMethod.GET)
 106         public Object healthGet(HttpServletResponse response) {
 107                 logger.debug("healthGet");
 108                 try {
 109                         e2HealthCheckApi.healthGet();
 110                         response.setStatus(e2HealthCheckApi.getApiClient().getStatusCode().value());
 111                         return null;
 112                 } catch (HttpStatusCodeException ex) {
 113                         logger.warn("healthGet failed: {}", ex.toString());
 114                         return ResponseEntity.status(HttpServletResponse.SC_BAD_GATEWAY).body(ex.getResponseBodyAsString());
 115                 }
 116         }
 117
 118         // TODO replace with actual functionality
 119         @ApiOperation(value = "Gets the unique requests submitted to the E2 manager.", response = E2SetupResponse.class, responseContainer = "List")
 120         @RequestMapping(value = "/setup", method = RequestMethod.GET)
 121         public Iterable<E2SetupResponse> getRequests() {
 122                 logger.debug("getRequests");
 123                 return responses;
 124         }
 125
 126         @ApiOperation(value = "Get RAN by name.", response = GetNodebResponse.class)
 127         @RequestMapping(value = "/nodeb/{" + PP_RANNAME + "}", method = RequestMethod.GET)
 128         public Object getNb(@PathVariable(PP_RANNAME) String ranName) {
 129                 logger.debug("getNb {}", ranName);
 130                 try {
 131                         return e2NodebApi.getNb(ranName);
 132                 } catch (HttpStatusCodeException ex) {
 133                         logger.warn("getNb failed: {}", ex.toString());
 134                         return ResponseEntity.status(HttpServletResponse.SC_BAD_GATEWAY).body(ex.getResponseBodyAsString());
 135                 }
 136         }
 137
 138         // TODO replace with actual functionality
 139         @ApiOperation(value = "Disconnect all RAN Connections.")
 140         @RequestMapping(value = "/disconnectAllRAN", method = RequestMethod.DELETE)
 141         public void disconnectAllRANConnections() {
 142                 logger.debug("disconnectAllRANConnections");
 143                 responses.clear();
 144         }
 145
 146         @ApiOperation(value = "Sets up an EN-DC RAN connection via the E2 manager.", response = E2SetupResponse.class)
 147         @RequestMapping(value = "/endcSetup", method = RequestMethod.POST)
 148         public Object endcSetup(@RequestBody SetupRequest setupRequest) {
 149                 logger.debug("endcSetup {}", setupRequest);
 150                 try {
 151                         assertNotEmpty(setupRequest.getRanIp());
 152                         assertNotEmpty(setupRequest.getRanName());
 153                         assertNotNull(setupRequest.getRanPort());
 154                 } catch (Exception ex) {
 155                         return new E2SetupResponse(E2SetupRequestType.ENDC, setupRequest, HttpServletResponse.SC_BAD_REQUEST);
 156                 }
 157                 try {
 158                         e2NodebApi.endcSetup(setupRequest);
 159                         E2SetupResponse r = new E2SetupResponse(E2SetupRequestType.ENDC, setupRequest,
 160                                         e2NodebApi.getApiClient().getStatusCode().value());
 161                         responses.add(r);
 162                         return r;
 163                 } catch (HttpStatusCodeException ex) {
 164                         logger.warn("endcSetup failed: {}", ex.toString());
 165                         return ResponseEntity.status(HttpServletResponse.SC_BAD_GATEWAY).body(ex.getResponseBodyAsString());
 166                 }
 167         }
 168
 169         @ApiOperation(value = "Sets up an X2 RAN connection via the E2 manager.", response = E2SetupResponse.class)
 170         @RequestMapping(value = "/x2Setup", method = RequestMethod.POST)
 171         public Object x2Setup(@RequestBody SetupRequest setupRequest) {
 172                 logger.debug("x2Setup {}", setupRequest);
 173                 try {
 174                         assertNotEmpty(setupRequest.getRanIp());
 175                         assertNotEmpty(setupRequest.getRanName());
 176                         assertNotNull(setupRequest.getRanPort());
 177                 } catch (Exception ex) {
 178                         return new E2SetupResponse(E2SetupRequestType.ENDC, setupRequest, HttpServletResponse.SC_BAD_REQUEST);
 179                 }
 180                 try {
 181                         e2NodebApi.x2Setup(setupRequest);
 182                         E2SetupResponse r = new E2SetupResponse(E2SetupRequestType.X2, setupRequest,
 183                                         e2NodebApi.getApiClient().getStatusCode().value());
 184                         responses.add(r);
 185                         return r;
 186                 } catch (HttpStatusCodeException ex) {
 187                         logger.warn("x2Setup failed: {}", ex.toString());
 188                         return ResponseEntity.status(HttpServletResponse.SC_BAD_GATEWAY).body(ex.getResponseBodyAsString());
 189                 }
 190         }
 191
 192 }