gerrit.onap Code Review - ccsdk/oran.git/blob

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * ONAP : ccsdk oran
   4  * ======================================================================
   5  * Copyright (C) 2019-2020 Nordix Foundation. All rights reserved.
   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.onap.ccsdk.oran.a1policymanagementservice.controllers.v1;
  22
  23 import com.google.gson.Gson;
  24 import com.google.gson.GsonBuilder;
  25
  26 import io.swagger.v3.oas.annotations.Operation;
  27 import io.swagger.v3.oas.annotations.Parameter;
  28 import io.swagger.v3.oas.annotations.media.ArraySchema;
  29 import io.swagger.v3.oas.annotations.media.Content;
  30 import io.swagger.v3.oas.annotations.media.Schema;
  31 import io.swagger.v3.oas.annotations.responses.ApiResponse;
  32 import io.swagger.v3.oas.annotations.responses.ApiResponses;
  33 import io.swagger.v3.oas.annotations.tags.Tag;
  34
  35 import java.lang.invoke.MethodHandles;
  36 import java.time.Instant;
  37 import java.util.ArrayList;
  38 import java.util.Collection;
  39 import java.util.List;
  40
  41 import lombok.Getter;
  42
  43 import org.onap.ccsdk.oran.a1policymanagementservice.clients.A1ClientFactory;
  44 import org.onap.ccsdk.oran.a1policymanagementservice.controllers.VoidResponse;
  45 import org.onap.ccsdk.oran.a1policymanagementservice.controllers.v2.ErrorResponse;
  46 import org.onap.ccsdk.oran.a1policymanagementservice.exceptions.EntityNotFoundException;
  47 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Lock.LockType;
  48 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policies;
  49 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policy;
  50 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyType;
  51 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyTypes;
  52 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Ric;
  53 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Rics;
  54 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Service;
  55 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Services;
  56 import org.slf4j.Logger;
  57 import org.slf4j.LoggerFactory;
  58 import org.springframework.beans.factory.annotation.Autowired;
  59 import org.springframework.http.HttpStatus;
  60 import org.springframework.http.ResponseEntity;
  61 import org.springframework.web.bind.annotation.DeleteMapping;
  62 import org.springframework.web.bind.annotation.GetMapping;
  63 import org.springframework.web.bind.annotation.PutMapping;
  64 import org.springframework.web.bind.annotation.RequestBody;
  65 import org.springframework.web.bind.annotation.RequestParam;
  66 import org.springframework.web.bind.annotation.RestController;
  67 import org.springframework.web.reactive.function.client.WebClientResponseException;
  68 import reactor.core.publisher.Mono;
  69
  70 @RestController
  71 @Tag(name = Consts.V1_API_NAME)
  72 public class PolicyController {
  73
  74     public static class RejectionException extends Exception {
  75         private static final long serialVersionUID = 1L;
  76         @Getter
  77         private final HttpStatus status;
  78
  79         public RejectionException(String message, HttpStatus status) {
  80             super(message);
  81             this.status = status;
  82         }
  83     }
  84
  85     @Autowired
  86     private Rics rics;
  87     @Autowired
  88     private PolicyTypes policyTypes;
  89     @Autowired
  90     private Policies policies;
  91     @Autowired
  92     private A1ClientFactory a1ClientFactory;
  93     @Autowired
  94     private Services services;
  95
  96     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  97     private static Gson gson = new GsonBuilder().create();
  98
  99     @GetMapping("/policy_schemas") //
 100     @Operation(summary = "Returns policy type schema definitions") //
 101     @ApiResponses(value = { //
 102             @ApiResponse(responseCode = "200", //
 103                     description = "Policy schemas", //
 104                     content = @Content(array = @ArraySchema(schema = @Schema(implementation = Object.class)))), //
 105             @ApiResponse(responseCode = "404", //
 106                     description = "Near-RT RIC is not found", //
 107                     content = @Content(schema = @Schema(implementation = ErrorResponse.ErrorInfo.class))) //
 108     })
 109     public ResponseEntity<String> getPolicySchemas( //
 110             @Parameter(name = "ric", required = false,
 111                     description = "The name of the Near-RT RIC to get the definitions for.") //
 112             @RequestParam(name = "ric", required = false) String ricName) throws EntityNotFoundException {
 113         if (ricName == null) {
 114             Collection<PolicyType> types = this.policyTypes.getAll();
 115             return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
 116         } else {
 117             Collection<PolicyType> types = rics.getRic(ricName).getSupportedPolicyTypes();
 118             return new ResponseEntity<>(toPolicyTypeSchemasJson(types), HttpStatus.OK);
 119         }
 120     }
 121
 122     @GetMapping("/policy_schema")
 123     @Operation(summary = "Returns one policy type schema definition")
 124     @ApiResponses(value = { //
 125             @ApiResponse(responseCode = "200", //
 126                     description = "Policy schema", //
 127                     content = @Content(schema = @Schema(implementation = Object.class))),
 128             @ApiResponse(responseCode = "404", //
 129                     description = "The policy type is not found", //
 130                     content = @Content(schema = @Schema(implementation = ErrorResponse.ErrorInfo.class)))//
 131     })
 132     public ResponseEntity<String> getPolicySchema( //
 133             @Parameter(name = "id", required = true,
 134                     description = "The identity of the policy type to get the definition for.") //
 135             @RequestParam(name = "id", required = true) String id) throws EntityNotFoundException {
 136         PolicyType type = policyTypes.getType(id);
 137         return new ResponseEntity<>(type.getSchema(), HttpStatus.OK);
 138     }
 139
 140     @GetMapping("/policy_types")
 141     @Operation(summary = "Query policy type names")
 142     @ApiResponses(value = { //
 143             @ApiResponse(responseCode = "200", //
 144                     description = "Policy type names", //
 145                     content = @Content(array = @ArraySchema(schema = @Schema(implementation = String.class)))), //
 146             @ApiResponse(responseCode = "404", //
 147                     description = "Near-RT RIC is not found", //
 148                     content = @Content(schema = @Schema(implementation = ErrorResponse.ErrorInfo.class)))//
 149     })
 150     public ResponseEntity<String> getPolicyTypes( //
 151             @Parameter(name = "ric", required = false, description = "The name of the Near-RT RIC to get types for.") //
 152             @RequestParam(name = "ric", required = false) String ricName) throws EntityNotFoundException {
 153         if (ricName == null) {
 154             Collection<PolicyType> types = this.policyTypes.getAll();
 155             return new ResponseEntity<>(toPolicyTypeIdsJson(types), HttpStatus.OK);
 156         } else {
 157             Collection<PolicyType> types = rics.getRic(ricName).getSupportedPolicyTypes();
 158             return new ResponseEntity<>(toPolicyTypeIdsJson(types), HttpStatus.OK);
 159         }
 160     }
 161
 162     @GetMapping("/policy")
 163     @Operation(summary = "Returns a policy configuration") //
 164     @ApiResponses(value = { //
 165             @ApiResponse(responseCode = "200", //
 166                     description = "Policy found", //
 167                     content = @Content(schema = @Schema(implementation = Object.class))), //
 168             @ApiResponse(responseCode = "404", //
 169                     description = "Policy is not found", //
 170                     content = @Content(schema = @Schema(implementation = ErrorResponse.ErrorInfo.class))//
 171             )} //
 172     )
 173     public ResponseEntity<String> getPolicy( //
 174             @Parameter(name = "id", required = true, description = "The identity of the policy instance.") //
 175             @RequestParam(name = "id", required = true) String id) throws EntityNotFoundException {
 176         Policy p = policies.getPolicy(id);
 177         return new ResponseEntity<>(p.getJson(), HttpStatus.OK);
 178     }
 179
 180     @DeleteMapping("/policy")
 181     @Operation(summary = "Delete a policy")
 182     @ApiResponses(value = { //
 183             @ApiResponse(responseCode = "200", //
 184                     description = "Not used", //
 185                     content = @Content(schema = @Schema(implementation = VoidResponse.class))),
 186             @ApiResponse(responseCode = "204", //
 187                     description = "Policy deleted", //
 188                     content = @Content(schema = @Schema(implementation = VoidResponse.class))),
 189             @ApiResponse(responseCode = "404", //
 190                     description = "Policy is not found", //
 191                     content = @Content(schema = @Schema(implementation = String.class))),
 192             @ApiResponse(responseCode = "423", //
 193                     description = "Near-RT RIC is not operational", //
 194                     content = @Content(schema = @Schema(implementation = String.class)))})
 195     public Mono<ResponseEntity<Object>> deletePolicy( //
 196             @Parameter(name = "id", required = true, description = "The identity of the policy instance.") //
 197             @RequestParam(name = "id", required = true) String id) throws EntityNotFoundException {
 198         Policy policy = policies.getPolicy(id);
 199         keepServiceAlive(policy.getOwnerServiceId());
 200         Ric ric = policy.getRic();
 201         return ric.getLock().lock(LockType.SHARED) //
 202                 .flatMap(notUsed -> assertRicStateIdle(ric)) //
 203                 .flatMap(notUsed -> a1ClientFactory.createA1Client(policy.getRic())) //
 204                 .doOnNext(notUsed -> policies.remove(policy)) //
 205                 .flatMap(client -> client.deletePolicy(policy)) //
 206                 .doOnNext(notUsed -> ric.getLock().unlockBlocking()) //
 207                 .doOnError(notUsed -> ric.getLock().unlockBlocking()) //
 208                 .flatMap(notUsed -> Mono.just(new ResponseEntity<>(HttpStatus.NO_CONTENT)))
 209                 .onErrorResume(this::handleException);
 210     }
 211
 212     @PutMapping(path = "/policy")
 213     @Operation(summary = "Put a policy")
 214     @ApiResponses(value = { //
 215             @ApiResponse(responseCode = "201", //
 216                     description = "Policy created", //
 217                     content = @Content(schema = @Schema(implementation = VoidResponse.class))), //
 218             @ApiResponse(responseCode = "200", //
 219                     description = "Policy updated", //
 220                     content = @Content(schema = @Schema(implementation = VoidResponse.class))), //
 221             @ApiResponse(responseCode = "423", //
 222                     description = "Near-RT RIC is not operational", //
 223                     content = @Content(schema = @Schema(implementation = String.class))), //
 224             @ApiResponse(responseCode = "404", //
 225                     description = "Near-RT RIC or policy type is not found", //
 226                     content = @Content(schema = @Schema(implementation = String.class))) //
 227     })
 228     public Mono<ResponseEntity<Object>> putPolicy( //
 229             @Parameter(name = "type", required = false, description = "The name of the policy type.") //
 230             @RequestParam(name = "type", required = false, defaultValue = "") String typeName, //
 231             @Parameter(name = "id", required = true, description = "The identity of the policy instance.") //
 232             @RequestParam(name = "id", required = true) String instanceId, //
 233             @Parameter(name = "ric", required = true,
 234                     description = "The name of the Near-RT RIC where the policy will be " + //
 235                             "created.") //
 236             @RequestParam(name = "ric", required = true) String ricName, //
 237             @Parameter(name = "service", required = true, description = "The name of the service creating the policy.") //
 238             @RequestParam(name = "service", required = true) String service, //
 239             @Parameter(name = "transient", required = false,
 240                     description = "If the policy is transient or not (boolean " + //
 241                             "defaulted to false). A policy is transient if it will be forgotten when the service needs to "
 242                             + //
 243                             "reconnect to the Near-RT RIC.") //
 244             @RequestParam(name = "transient", required = false, defaultValue = "false") boolean isTransient, //
 245             @RequestBody Object jsonBody) {
 246
 247         String jsonString = gson.toJson(jsonBody);
 248         Ric ric = rics.get(ricName);
 249         PolicyType type = policyTypes.get(typeName);
 250         keepServiceAlive(service);
 251         if (ric == null || type == null) {
 252             return Mono.just(new ResponseEntity<>(HttpStatus.NOT_FOUND));
 253         }
 254         Policy policy = Policy.builder() //
 255                 .id(instanceId) //
 256                 .json(jsonString) //
 257                 .type(type) //
 258                 .ric(ric) //
 259                 .ownerServiceId(service) //
 260                 .lastModified(Instant.now()) //
 261                 .isTransient(isTransient) //
 262                 .statusNotificationUri("") //
 263                 .build();
 264
 265         final boolean isCreate = this.policies.get(policy.getId()) == null;
 266
 267         return ric.getLock().lock(LockType.SHARED) //
 268                 .flatMap(notUsed -> assertRicStateIdle(ric)) //
 269                 .flatMap(notUsed -> checkSupportedType(ric, type)) //
 270                 .flatMap(notUsed -> validateModifiedPolicy(policy)) //
 271                 .flatMap(notUsed -> a1ClientFactory.createA1Client(ric)) //
 272                 .flatMap(client -> client.putPolicy(policy)) //
 273                 .doOnNext(notUsed -> policies.put(policy)) //
 274                 .doOnNext(notUsed -> ric.getLock().unlockBlocking()) //
 275                 .doOnError(trowable -> ric.getLock().unlockBlocking()) //
 276                 .flatMap(notUsed -> Mono.just(new ResponseEntity<>(isCreate ? HttpStatus.CREATED : HttpStatus.OK))) //
 277                 .onErrorResume(this::handleException);
 278     }
 279
 280     @SuppressWarnings({"unchecked"})
 281     private <T> Mono<ResponseEntity<T>> createResponseEntity(String message, HttpStatus status) {
 282         ResponseEntity<T> re = new ResponseEntity<>((T) message, status);
 283         return Mono.just(re);
 284     }
 285
 286     private <T> Mono<ResponseEntity<T>> handleException(Throwable throwable) {
 287         if (throwable instanceof WebClientResponseException) {
 288             WebClientResponseException e = (WebClientResponseException) throwable;
 289             return createResponseEntity(e.getResponseBodyAsString(), e.getStatusCode());
 290         } else if (throwable instanceof RejectionException) {
 291             RejectionException e = (RejectionException) throwable;
 292             return createResponseEntity(e.getMessage(), e.getStatus());
 293         } else {
 294             return createResponseEntity(throwable.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
 295         }
 296     }
 297
 298     private Mono<Object> validateModifiedPolicy(Policy policy) {
 299         // Check that ric is not updated
 300         Policy current = this.policies.get(policy.getId());
 301         if (current != null && !current.getRic().id().equals(policy.getRic().id())) {
 302             RejectionException e = new RejectionException("Policy cannot change RIC, policyId: " + current.getId() + //
 303                     ", RIC name: " + current.getRic().id() + //
 304                     ", new name: " + policy.getRic().id(), HttpStatus.CONFLICT);
 305             logger.debug("Request rejected, {}", e.getMessage());
 306             return Mono.error(e);
 307         }
 308         return Mono.just("OK");
 309     }
 310
 311     private Mono<Object> checkSupportedType(Ric ric, PolicyType type) {
 312         if (!ric.isSupportingType(type.getId())) {
 313             logger.debug("Request rejected, type not supported, RIC: {}", ric);
 314             RejectionException e = new RejectionException(
 315                     "Type: " + type.getId() + " not supported by RIC: " + ric.id(), HttpStatus.NOT_FOUND);
 316             return Mono.error(e);
 317         }
 318         return Mono.just("OK");
 319     }
 320
 321     private Mono<Object> assertRicStateIdle(Ric ric) {
 322         if (ric.getState() == Ric.RicState.AVAILABLE) {
 323             return Mono.just("OK");
 324         } else {
 325             logger.debug("Request rejected RIC not IDLE, ric: {}", ric);
 326             RejectionException e = new RejectionException(
 327                     "Ric is not operational, RIC name: " + ric.id() + ", state: " + ric.getState(), HttpStatus.LOCKED);
 328             return Mono.error(e);
 329         }
 330     }
 331
 332     @GetMapping("/policies")
 333     @Operation(summary = "Query policies")
 334     @ApiResponses(value = { //
 335             @ApiResponse(responseCode = "200", //
 336                     description = "Policies", //
 337                     content = @Content(array = @ArraySchema(schema = @Schema(implementation = PolicyInfo.class)))), //
 338             @ApiResponse(responseCode = "404", //
 339                     description = "Near-RT RIC or type not found", //
 340                     content = @Content(schema = @Schema(implementation = String.class)))})
 341     public ResponseEntity<String> getPolicies( //
 342             @Parameter(name = "type", required = false,
 343                     description = "The name of the policy type to get policies for.") //
 344             @RequestParam(name = "type", required = false) String type, //
 345             @Parameter(name = "ric", required = false, description = "The name of the Near-RT RIC to get policies for.") //
 346             @RequestParam(name = "ric", required = false) String ric, //
 347             @Parameter(name = "service", required = false, description = "The name of the service to get policies for.") //
 348             @RequestParam(name = "service", required = false) String service) //
 349     {
 350         if ((type != null && this.policyTypes.get(type) == null)) {
 351             return new ResponseEntity<>("Policy type not found", HttpStatus.NOT_FOUND);
 352         }
 353         if ((ric != null && this.rics.get(ric) == null)) {
 354             return new ResponseEntity<>("Near-RT RIC not found", HttpStatus.NOT_FOUND);
 355         }
 356
 357         String filteredPolicies = policiesToJson(filter(type, ric, service));
 358         return new ResponseEntity<>(filteredPolicies, HttpStatus.OK);
 359     }
 360
 361     @GetMapping("/policy_ids")
 362     @Operation(summary = "Query policies, only policy identities returned")
 363     @ApiResponses(value = { //
 364             @ApiResponse(responseCode = "200", //
 365                     description = "Policy identitiess", //
 366                     content = @Content(array = @ArraySchema(schema = @Schema(implementation = String.class)))),
 367             @ApiResponse(responseCode = "404", //
 368                     description = "Near-RT RIC or type not found", //
 369                     content = @Content(schema = @Schema(implementation = String.class)))})
 370     public ResponseEntity<String> getPolicyIds( //
 371             @Parameter(name = "type", required = false,
 372                     description = "The name of the policy type to get policies for.") //
 373             @RequestParam(name = "type", required = false) String type, //
 374             @Parameter(name = "ric", required = false, description = "The name of the Near-RT RIC to get policies for.") //
 375             @RequestParam(name = "ric", required = false) String ric, //
 376             @Parameter(name = "service", required = false, description = "The name of the service to get policies for.") //
 377             @RequestParam(name = "service", required = false) String service) //
 378     {
 379         if ((type != null && this.policyTypes.get(type) == null)) {
 380             return new ResponseEntity<>("Policy type not found", HttpStatus.NOT_FOUND);
 381         }
 382         if ((ric != null && this.rics.get(ric) == null)) {
 383             return new ResponseEntity<>("Near-RT RIC not found", HttpStatus.NOT_FOUND);
 384         }
 385
 386         String policyIdsJson = toPolicyIdsJson(filter(type, ric, service));
 387         return new ResponseEntity<>(policyIdsJson, HttpStatus.OK);
 388     }
 389
 390     @GetMapping("/policy_status")
 391     @Operation(summary = "Returns a policy status") //
 392     @ApiResponses(value = { //
 393             @ApiResponse(responseCode = "200", //
 394                     description = "Policy status", //
 395                     content = @Content(schema = @Schema(implementation = Object.class))), //
 396             @ApiResponse(responseCode = "404", //
 397                     description = "Policy is not found", //
 398                     content = @Content(schema = @Schema(implementation = String.class))) //
 399     })
 400     public Mono<ResponseEntity<String>> getPolicyStatus( //
 401             @Parameter(name = "id", required = true, description = "The identity of the policy.") @RequestParam(
 402                     name = "id", //
 403                     required = true) String id)
 404             throws EntityNotFoundException {
 405         Policy policy = policies.getPolicy(id);
 406
 407         return a1ClientFactory.createA1Client(policy.getRic()) //
 408                 .flatMap(client -> client.getPolicyStatus(policy)) //
 409                 .flatMap(status -> Mono.just(new ResponseEntity<>(status, HttpStatus.OK)))
 410                 .onErrorResume(this::handleException);
 411     }
 412
 413     private void keepServiceAlive(String name) {
 414         Service s = this.services.get(name);
 415         if (s != null) {
 416             s.keepAlive();
 417         }
 418     }
 419
 420     private boolean include(String filter, String value) {
 421         return filter == null || value.equals(filter);
 422     }
 423
 424     private Collection<Policy> filter(Collection<Policy> collection, String type, String ric, String service) {
 425         if (type == null && ric == null && service == null) {
 426             return collection;
 427         }
 428         List<Policy> filtered = new ArrayList<>();
 429         for (Policy p : collection) {
 430             if (include(type, p.getType().getId()) && include(ric, p.getRic().id())
 431                     && include(service, p.getOwnerServiceId())) {
 432                 filtered.add(p);
 433             }
 434         }
 435         return filtered;
 436     }
 437
 438     private Collection<Policy> filter(String type, String ric, String service) {
 439         if (type != null) {
 440             return filter(policies.getForType(type), null, ric, service);
 441         } else if (service != null) {
 442             return filter(policies.getForService(service), type, ric, null);
 443         } else if (ric != null) {
 444             return filter(policies.getForRic(ric), type, null, service);
 445         } else {
 446             return policies.getAll();
 447         }
 448     }
 449
 450     private String policiesToJson(Collection<Policy> policies) {
 451         List<PolicyInfo> v = new ArrayList<>(policies.size());
 452         for (Policy p : policies) {
 453             PolicyInfo policyInfo = new PolicyInfo();
 454             policyInfo.id = p.getId();
 455             policyInfo.json = fromJson(p.getJson());
 456             policyInfo.ric = p.getRic().id();
 457             policyInfo.type = p.getType().getId();
 458             policyInfo.service = p.getOwnerServiceId();
 459             policyInfo.lastModified = p.getLastModified().toString();
 460             if (!policyInfo.validate()) {
 461                 logger.error("BUG, all fields must be set");
 462             }
 463             v.add(policyInfo);
 464         }
 465         return gson.toJson(v);
 466     }
 467
 468     private Object fromJson(String jsonStr) {
 469         return gson.fromJson(jsonStr, Object.class);
 470     }
 471
 472     private String toPolicyTypeSchemasJson(Collection<PolicyType> types) {
 473         StringBuilder result = new StringBuilder();
 474         result.append("[");
 475         boolean first = true;
 476         for (PolicyType t : types) {
 477             if (!first) {
 478                 result.append(",");
 479             }
 480             first = false;
 481             result.append(t.getSchema());
 482         }
 483         result.append("]");
 484         return result.toString();
 485     }
 486
 487     private String toPolicyTypeIdsJson(Collection<PolicyType> types) {
 488         List<String> v = new ArrayList<>(types.size());
 489         for (PolicyType t : types) {
 490             v.add(t.getId());
 491         }
 492         return gson.toJson(v);
 493     }
 494
 495     private String toPolicyIdsJson(Collection<Policy> policies) {
 496         List<String> v = new ArrayList<>(policies.size());
 497         for (Policy p : policies) {
 498             v.add(p.getId());
 499         }
 500         return gson.toJson(v);
 501     }
 502
 503 }