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