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.tasks;
  22
  23 import static org.onap.ccsdk.oran.a1policymanagementservice.repository.Ric.RicState;
  24
  25 import org.onap.ccsdk.oran.a1policymanagementservice.clients.A1Client;
  26 import org.onap.ccsdk.oran.a1policymanagementservice.clients.A1ClientFactory;
  27 import org.onap.ccsdk.oran.a1policymanagementservice.clients.AsyncRestClientFactory;
  28 import org.onap.ccsdk.oran.a1policymanagementservice.controllers.ServiceCallbacks;
  29 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Lock.LockType;
  30 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policies;
  31 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policy;
  32 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyType;
  33 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyTypes;
  34 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Ric;
  35 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Rics;
  36 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Services;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 import reactor.core.publisher.Flux;
  41 import reactor.core.publisher.Mono;
  42
  43 /**
  44  * Synchronizes the content of a Near-RT RIC with the content in the repository.
  45  * This means:
  46  * <p>
  47  * load all policy types
  48  * <p>
  49  * send all policy instances to the Near-RT RIC
  50  * <p>
  51  * if that fails remove all policy instances
  52  * <p>
  53  * Notify subscribing services
  54  */
  55 @SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
  56 public class RicSynchronizationTask {
  57
  58     private static final Logger logger = LoggerFactory.getLogger(RicSynchronizationTask.class);
  59     static final int CONCURRENCY_RIC = 1; // How many paralell requests that is sent to one NearRT RIC
  60
  61     private final A1ClientFactory a1ClientFactory;
  62     private final PolicyTypes policyTypes;
  63     private final Policies policies;
  64     private final Services services;
  65     private final Rics rics;
  66     private final AsyncRestClientFactory restClientFactory;
  67
  68     public RicSynchronizationTask(A1ClientFactory a1ClientFactory, PolicyTypes policyTypes, Policies policies,
  69             Services services, AsyncRestClientFactory restClientFactory, Rics rics) {
  70         this.a1ClientFactory = a1ClientFactory;
  71         this.policyTypes = policyTypes;
  72         this.policies = policies;
  73         this.services = services;
  74         this.restClientFactory = restClientFactory;
  75         this.rics = rics;
  76     }
  77
  78     public void run(Ric ric) {
  79         logger.debug("Ric synchronization task created: {}", ric.getConfig().getRicId());
  80
  81         if (ric.getState() == RicState.SYNCHRONIZING) {
  82             logger.debug("Ric: {} is already being synchronized", ric.getConfig().getRicId());
  83             return;
  84         }
  85
  86         ric.getLock().lock(LockType.EXCLUSIVE, "RicSynchronizationTask") //
  87                 .flatMap(notUsed -> synchronizeRic(ric)) //
  88                 .doFinally(sig -> ric.getLock().unlockBlocking()) //
  89                 .subscribe();
  90     }
  91
  92     public Mono<Ric> synchronizeRic(Ric ric) {
  93         return this.a1ClientFactory.createA1Client(ric) //
  94                 .doOnNext(client -> ric.setState(RicState.SYNCHRONIZING)) //
  95                 .flatMapMany(client -> runSynchronization(ric, client)) //
  96                 .onErrorResume(throwable -> deleteAllPolicyInstances(ric, throwable)) //
  97                 .collectList() //
  98                 .map(notUsed -> ric) //
  99                 .doOnError(t -> { //
 100                     logger.warn("Synchronization failure for ric: {}, reason: {}", ric.id(), t.getMessage()); //
 101                     ric.setState(RicState.UNAVAILABLE); //
 102                 }) //
 103                 .flatMap(notUsed -> onSynchronizationComplete(ric)) //
 104                 .onErrorResume(t -> Mono.just(ric));
 105     }
 106
 107     public Flux<PolicyType> synchronizePolicyTypes(Ric ric, A1Client a1Client) {
 108         return a1Client.getPolicyTypeIdentities() //
 109                 .doOnNext(x -> ric.clearSupportedPolicyTypes()) //
 110                 .flatMapMany(Flux::fromIterable) //
 111                 .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().getRicId(), typeId)) //
 112                 .flatMap(policyTypeId -> getPolicyType(policyTypeId, a1Client), CONCURRENCY_RIC) //
 113                 .doOnNext(ric::addSupportedPolicyType); //
 114     }
 115
 116     private Flux<Object> runSynchronization(Ric ric, A1Client a1Client) {
 117         Flux<PolicyType> synchronizedTypes = synchronizePolicyTypes(ric, a1Client);
 118         Flux<?> policiesDeletedInRic = a1Client.deleteAllPolicies();
 119         Flux<Policy> policiesRecreatedInRic = recreateAllPoliciesInRic(ric, a1Client);
 120
 121         return Flux.concat(synchronizedTypes, policiesDeletedInRic, policiesRecreatedInRic);
 122     }
 123
 124     private Mono<Ric> onSynchronizationComplete(Ric ric) {
 125         if (this.rics.get(ric.id()) == null) {
 126             logger.debug("Policies removed in removed ric: {}", ric.id());
 127             return Mono.empty();
 128         }
 129         logger.debug("Synchronization completed for: {}", ric.id());
 130         ric.setState(RicState.AVAILABLE);
 131         ServiceCallbacks callbacks = new ServiceCallbacks(this.restClientFactory);
 132         return callbacks.notifyServicesRicAvailable(ric, services) //
 133                 .collectList() //
 134                 .map(list -> ric);
 135     }
 136
 137     private Flux<Object> deleteAllPolicyInstances(Ric ric, Throwable t) {
 138         logger.warn("Recreation of policies failed for ric: {}, reason: {}", ric.id(), t.getMessage());
 139         deleteAllPoliciesInRepository(ric);
 140
 141         Flux<PolicyType> synchronizedTypes = this.a1ClientFactory.createA1Client(ric) //
 142                 .flatMapMany(a1Client -> synchronizePolicyTypes(ric, a1Client));
 143         Flux<?> deletePoliciesInRic = this.a1ClientFactory.createA1Client(ric) //
 144                 .flatMapMany(A1Client::deleteAllPolicies) //
 145                 .doOnComplete(() -> deleteAllPoliciesInRepository(ric));
 146
 147         return Flux.concat(synchronizedTypes, deletePoliciesInRic);
 148     }
 149
 150     private Mono<PolicyType> getPolicyType(String policyTypeId, A1Client a1Client) {
 151         if (policyTypes.contains(policyTypeId)) {
 152             return Mono.just(policyTypes.get(policyTypeId));
 153         }
 154         return a1Client.getPolicyTypeSchema(policyTypeId) //
 155                 .map(schema -> createPolicyType(policyTypeId, schema));
 156     }
 157
 158     private PolicyType createPolicyType(String policyTypeId, String schema) {
 159         PolicyType pt = PolicyType.builder().id(policyTypeId).schema(schema).build();
 160         policyTypes.put(pt);
 161         return pt;
 162     }
 163
 164     private void deleteAllPoliciesInRepository(Ric ric) {
 165         for (Policy policy : policies.getForRic(ric.id())) {
 166             this.policies.remove(policy);
 167         }
 168     }
 169
 170     private Flux<Policy> putPolicy(Policy policy, Ric ric, A1Client a1Client) {
 171         logger.trace("Recreating policy: {}, for ric: {}", policy.getId(), ric.getConfig().getRicId());
 172         return a1Client.putPolicy(policy) //
 173                 .flatMapMany(notUsed -> Flux.just(policy));
 174     }
 175
 176     private boolean checkTransient(Policy policy) {
 177         if (policy.isTransient()) {
 178             this.policies.remove(policy);
 179         }
 180         return policy.isTransient();
 181     }
 182
 183     private Flux<Policy> recreateAllPoliciesInRic(Ric ric, A1Client a1Client) {
 184         return Flux.fromIterable(policies.getForRic(ric.id())) //
 185                 .doOnNext(policy -> logger.debug("Recreating policy: {}, ric: {}", policy.getId(), ric.id())) //
 186                 .filter(policy -> !checkTransient(policy)) //
 187                 .flatMap(policy -> putPolicy(policy, ric, a1Client), CONCURRENCY_RIC)
 188                 .doOnError(t -> logger.warn("Recreating policy failed, ric: {}, reason: {}", ric.id(), t.getMessage()));
 189     }
 190
 191 }