policy-agent/src/main/java/org/oransc/policyagent/controllers/PolicyController.java

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  * %%
   5  * Copyright (C) 2019 Nordix Foundation
   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
  21 package org.oransc.policyagent.controllers;
  22
  23 import com.google.gson.Gson;
  24 import com.google.gson.GsonBuilder;
  25
  26 import java.util.Collection;
  27 import java.util.Vector;
  28
  29 import org.oransc.policyagent.configuration.ApplicationConfig;
  30 import org.oransc.policyagent.exceptions.ServiceException;
  31 import org.oransc.policyagent.repository.ImmutablePolicy;
  32 import org.oransc.policyagent.repository.Policies;
  33 import org.oransc.policyagent.repository.Policy;
  34 import org.oransc.policyagent.repository.PolicyType;
  35 import org.oransc.policyagent.repository.PolicyTypes;
  36 import org.oransc.policyagent.repository.Ric;
  37 import org.oransc.policyagent.repository.Rics;
  38 import org.oransc.policyagent.repository.Services;
  39 import org.springframework.beans.factory.annotation.Autowired;
  40 import org.springframework.http.HttpStatus;
  41 import org.springframework.http.ResponseEntity;
  42 import org.springframework.web.bind.annotation.DeleteMapping;
  43 import org.springframework.web.bind.annotation.GetMapping;
  44 import org.springframework.web.bind.annotation.PutMapping;
  45 import org.springframework.web.bind.annotation.RequestBody;
  46 import org.springframework.web.bind.annotation.RequestParam;
  47 import org.springframework.web.bind.annotation.RestController;
  48
  49 @RestController
  50 public class PolicyController {
  51
  52     private final ApplicationConfig appConfig;
  53     private final Rics rics;
  54     private final PolicyTypes policyTypes;
  55     private final Policies policies;
  56     private final Services services;
  57     private static Gson gson = new GsonBuilder() //
  58         .serializeNulls() //
  59         .create(); //
  60
  61     @Autowired
  62     PolicyController(ApplicationConfig config, PolicyTypes types, Policies policies, Rics rics, Services services) {
  63         this.appConfig = config;
  64         this.policyTypes = types;
  65         this.policies = policies;
  66         this.rics = rics;
  67         this.services = services;
  68     }
  69
  70     @GetMapping("/policy_types")
  71     public ResponseEntity<String> getPolicyTypes() {
  72
  73         Collection<PolicyType> types = this.policyTypes.getAll();
  74         return new ResponseEntity<String>(policyTypesToJson(types), HttpStatus.OK);
  75     }
  76
  77     @GetMapping("/policy")
  78     public ResponseEntity<String> getPolicy( //
  79         @RequestParam(name = "instance", required = true) String instance) {
  80         try {
  81             Policy p = policies.get(instance);
  82             return new ResponseEntity<String>(p.json(), HttpStatus.OK);
  83         } catch (ServiceException e) {
  84             return new ResponseEntity<String>(e.getMessage(), HttpStatus.NO_CONTENT);
  85         }
  86     }
  87
  88     @DeleteMapping("/policy")
  89     public ResponseEntity<String> deletePolicy( //
  90         @RequestParam(name = "instance", required = true) String instance) {
  91
  92         Policy p = policies.removeId(instance);
  93         return new ResponseEntity<String>("OK", HttpStatus.OK);
  94     }
  95
  96     @GetMapping("/policies")
  97     public ResponseEntity<String> getPolicies( //
  98         @RequestParam(name = "type", required = false) String type, //
  99         @RequestParam(name = "ric", required = false) String ric, //
 100         @RequestParam(name = "service", required = false) String service) //
 101     {
 102         Collection<Policy> result = null;
 103
 104         if (type != null) {
 105             result = policies.getForType(type);
 106             result = filter(result, null, ric, service);
 107         } else if (service != null) {
 108             result = policies.getForService(service);
 109             result = filter(result, type, ric, null);
 110         } else if (ric != null) {
 111             result = policies.getForRic(ric);
 112             result = filter(result, type, null, service);
 113         } else {
 114             result = policies.getAll();
 115         }
 116
 117         return new ResponseEntity<String>(policiesToJson(result), HttpStatus.OK);
 118     }
 119
 120     private boolean include(String filter, String value) {
 121         return filter == null || value.equals(filter);
 122     }
 123
 124     private Collection<Policy> filter(Collection<Policy> collection, String type, String ric, String service) {
 125         if (type == null && ric == null && service == null) {
 126             return collection;
 127         }
 128         Vector<Policy> filtered = new Vector<>();
 129         for (Policy p : collection) {
 130             if (include(type, p.type().name()) && include(ric, p.ric().name())
 131                 && include(service, p.ownerServiceName())) {
 132                 filtered.add(p);
 133             }
 134         }
 135         return filtered;
 136     }
 137
 138     private String policiesToJson(Collection<Policy> policies) {
 139         Vector<PolicyInfo> v = new Vector<>(policies.size());
 140         for (Policy p : policies) {
 141             PolicyInfo policyInfo = ImmutablePolicyInfo.builder() //
 142                 .json(p.json()) //
 143                 .id(p.id()) //
 144                 .ric(p.ric().name()) //
 145                 .type(p.type().name()) //
 146                 .service(p.ownerServiceName()) //
 147                 .lastModified(p.lastModified()) //
 148                 .build();
 149             v.add(policyInfo);
 150         }
 151         return gson.toJson(v);
 152     }
 153
 154     private String policyTypesToJson(Collection<PolicyType> types) {
 155         Vector<PolicyTypeInfo> v = new Vector<>(types.size());
 156         for (PolicyType t : types) {
 157             PolicyTypeInfo policyInfo = ImmutablePolicyTypeInfo.builder() //
 158                 .name(t.name()) //
 159                 .build();
 160             v.add(policyInfo);
 161         }
 162         return gson.toJson(v);
 163     }
 164
 165     private String getTimeStampUTC() {
 166         return java.time.Instant.now().toString();
 167     }
 168
 169     @PutMapping(path = "/policy")
 170     public ResponseEntity<String> putPolicy( //
 171         @RequestParam(name = "type", required = true) String type, //
 172         @RequestParam(name = "instance", required = true) String instanceId, //
 173         @RequestParam(name = "ric", required = true) String ric, //
 174         @RequestParam(name = "service", required = true) String service, //
 175         @RequestBody String jsonBody) {
 176
 177         try {
 178             // services.getService(service).ping();
 179             Ric ricObj = rics.getRic(ric);
 180             Policy policy = ImmutablePolicy.builder() //
 181                 .id(instanceId) //
 182                 .json(jsonBody) //
 183                 .type(policyTypes.getType(type)) //
 184                 .ric(ricObj) //
 185                 .ownerServiceName(service) //
 186                 .lastModified(getTimeStampUTC()) //
 187                 .build();
 188             policies.put(policy);
 189             return new ResponseEntity<String>(HttpStatus.OK);
 190         } catch (ServiceException e) {
 191             return new ResponseEntity<String>(e.getMessage(), HttpStatus.NOT_FOUND);
 192         }
 193     }
 194
 195 }