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