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.AsyncRestClient;
  28 import org.onap.ccsdk.oran.a1policymanagementservice.clients.AsyncRestClientFactory;
  29 import org.onap.ccsdk.oran.a1policymanagementservice.configuration.ApplicationConfig;
  30 import org.onap.ccsdk.oran.a1policymanagementservice.repository.ImmutablePolicyType;
  31 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Lock.LockType;
  32 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policies;
  33 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Policy;
  34 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyType;
  35 import org.onap.ccsdk.oran.a1policymanagementservice.repository.PolicyTypes;
  36 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Ric;
  37 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Service;
  38 import org.onap.ccsdk.oran.a1policymanagementservice.repository.Services;
  39 import org.slf4j.Logger;
  40 import org.slf4j.LoggerFactory;
  41
  42 import reactor.core.publisher.BaseSubscriber;
  43 import reactor.core.publisher.Flux;
  44 import reactor.core.publisher.Mono;
  45 import reactor.core.publisher.SignalType;
  46
  47 /**
  48  * Synchronizes the content of a Near-RT RIC with the content in the repository.
  49  * This means:
  50  * <p>
  51  * load all policy types
  52  * <p>
  53  * send all policy instances to the Near-RT RIC
  54  * <p>
  55  * if that fails remove all policy instances
  56  * <p>
  57  * Notify subscribing services
  58  */
  59 @SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
  60 public class RicSynchronizationTask {
  61
  62     private static final Logger logger = LoggerFactory.getLogger(RicSynchronizationTask.class);
  63     static final int CONCURRENCY_RIC = 1; // How may paralell requests that is sent to one NearRT RIC
  64
  65     private final A1ClientFactory a1ClientFactory;
  66     private final PolicyTypes policyTypes;
  67     private final Policies policies;
  68     private final Services services;
  69     private final AsyncRestClientFactory restClientFactory;
  70
  71     public RicSynchronizationTask(A1ClientFactory a1ClientFactory, PolicyTypes policyTypes, Policies policies,
  72             Services services, ApplicationConfig config) {
  73         this.a1ClientFactory = a1ClientFactory;
  74         this.policyTypes = policyTypes;
  75         this.policies = policies;
  76         this.services = services;
  77         this.restClientFactory = new AsyncRestClientFactory(config.getWebClientConfig());
  78     }
  79
  80     public void run(Ric ric) {
  81         logger.debug("Handling ric: {}", ric.getConfig().ricId());
  82
  83         if (ric.getState() == RicState.SYNCHRONIZING) {
  84             logger.debug("Ric: {} is already being synchronized", ric.getConfig().ricId());
  85             return;
  86         }
  87
  88         ric.getLock().lock(LockType.EXCLUSIVE) //
  89                 .flatMap(notUsed -> setRicState(ric)) //
  90                 .flatMap(lock -> this.a1ClientFactory.createA1Client(ric)) //
  91                 .flatMapMany(client -> runSynchronization(ric, client)) //
  92                 .onErrorResume(throwable -> deleteAllPolicyInstances(ric, throwable))
  93                 .subscribe(new BaseSubscriber<Object>() {
  94                     @Override
  95                     protected void hookOnError(Throwable throwable) {
  96                         logger.warn("Synchronization failure for ric: {}, reason: {}", ric.id(),
  97                                 throwable.getMessage());
  98                         ric.setState(RicState.UNAVAILABLE);
  99                     }
 100
 101                     @Override
 102                     protected void hookOnComplete() {
 103                         onSynchronizationComplete(ric);
 104                     }
 105
 106                     @Override
 107                     protected void hookFinally(SignalType type) {
 108                         ric.getLock().unlockBlocking();
 109                     }
 110                 });
 111     }
 112
 113     @SuppressWarnings("squid:S2445") // Blocks should be synchronized on "private final" fields
 114     private Mono<Ric> setRicState(Ric ric) {
 115         synchronized (ric) {
 116             if (ric.getState() == RicState.SYNCHRONIZING) {
 117                 logger.debug("Ric: {} is already being synchronized", ric.getConfig().ricId());
 118                 return Mono.empty();
 119             }
 120             ric.setState(RicState.SYNCHRONIZING);
 121             return Mono.just(ric);
 122         }
 123     }
 124
 125     private Flux<Object> runSynchronization(Ric ric, A1Client a1Client) {
 126         Flux<PolicyType> synchronizedTypes = synchronizePolicyTypes(ric, a1Client);
 127         Flux<?> policiesDeletedInRic = a1Client.deleteAllPolicies();
 128         Flux<Policy> policiesRecreatedInRic = recreateAllPoliciesInRic(ric, a1Client);
 129
 130         return Flux.concat(synchronizedTypes, policiesDeletedInRic, policiesRecreatedInRic);
 131     }
 132
 133     private void onSynchronizationComplete(Ric ric) {
 134         logger.debug("Synchronization completed for: {}", ric.id());
 135         ric.setState(RicState.AVAILABLE);
 136         notifyAllServices("Synchronization completed for:" + ric.id());
 137     }
 138
 139     private void notifyAllServices(String body) {
 140         for (Service service : services.getAll()) {
 141             String url = service.getCallbackUrl();
 142             if (url.length() > 0) {
 143                 createNotificationClient(url) //
 144                         .put("", body) //
 145                         .subscribe( //
 146                                 notUsed -> logger.debug("Service {} notified", service.getName()),
 147                                 throwable -> logger.warn("Service notification failed for service: {}. Cause: {}",
 148                                         service.getName(), throwable.getMessage()),
 149                                 () -> logger.debug("All services notified"));
 150             }
 151         }
 152     }
 153
 154     private Flux<Object> deleteAllPolicyInstances(Ric ric, Throwable t) {
 155         logger.debug("Recreation of policies failed for ric: {}, reason: {}", ric.id(), t.getMessage());
 156         deleteAllPoliciesInRepository(ric);
 157
 158         Flux<PolicyType> synchronizedTypes = this.a1ClientFactory.createA1Client(ric) //
 159                 .flatMapMany(a1Client -> synchronizePolicyTypes(ric, a1Client));
 160         Flux<?> deletePoliciesInRic = this.a1ClientFactory.createA1Client(ric) //
 161                 .flatMapMany(A1Client::deleteAllPolicies) //
 162                 .doOnComplete(() -> deleteAllPoliciesInRepository(ric));
 163
 164         return Flux.concat(synchronizedTypes, deletePoliciesInRic);
 165     }
 166
 167     AsyncRestClient createNotificationClient(final String url) {
 168         return restClientFactory.createRestClient(url);
 169     }
 170
 171     private Flux<PolicyType> synchronizePolicyTypes(Ric ric, A1Client a1Client) {
 172         return a1Client.getPolicyTypeIdentities() //
 173                 .doOnNext(x -> ric.clearSupportedPolicyTypes()) //
 174                 .flatMapMany(Flux::fromIterable) //
 175                 .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().ricId(), typeId)) //
 176                 .flatMap(policyTypeId -> getPolicyType(policyTypeId, a1Client), CONCURRENCY_RIC) //
 177                 .doOnNext(ric::addSupportedPolicyType); //
 178     }
 179
 180     private Mono<PolicyType> getPolicyType(String policyTypeId, A1Client a1Client) {
 181         if (policyTypes.contains(policyTypeId)) {
 182             return Mono.just(policyTypes.get(policyTypeId));
 183         }
 184         return a1Client.getPolicyTypeSchema(policyTypeId) //
 185                 .flatMap(schema -> createPolicyType(policyTypeId, schema));
 186     }
 187
 188     private Mono<PolicyType> createPolicyType(String policyTypeId, String schema) {
 189         PolicyType pt = ImmutablePolicyType.builder().id(policyTypeId).schema(schema).build();
 190         policyTypes.put(pt);
 191         return Mono.just(pt);
 192     }
 193
 194     private void deleteAllPoliciesInRepository(Ric ric) {
 195         for (Policy policy : policies.getForRic(ric.id())) {
 196             this.policies.remove(policy);
 197         }
 198     }
 199
 200     private Flux<Policy> putPolicy(Policy policy, Ric ric, A1Client a1Client) {
 201         logger.debug("Recreating policy: {}, for ric: {}", policy.id(), ric.getConfig().ricId());
 202         return a1Client.putPolicy(policy) //
 203                 .flatMapMany(notUsed -> Flux.just(policy));
 204     }
 205
 206     private boolean checkTransient(Policy policy) {
 207         if (policy.isTransient()) {
 208             this.policies.remove(policy);
 209         }
 210         return policy.isTransient();
 211     }
 212
 213     private Flux<Policy> recreateAllPoliciesInRic(Ric ric, A1Client a1Client) {
 214         return Flux.fromIterable(policies.getForRic(ric.id())) //
 215                 .filter(policy -> !checkTransient(policy)) //
 216                 .flatMap(policy -> putPolicy(policy, ric, a1Client), CONCURRENCY_RIC);
 217     }
 218
 219 }