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.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.Rics;
  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 many 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 Rics rics;
  69     private final AsyncRestClientFactory restClientFactory;
  70
  71     public RicSynchronizationTask(A1ClientFactory a1ClientFactory, PolicyTypes policyTypes, Policies policies,
  72             Services services, AsyncRestClientFactory restClientFactory, Rics rics) {
  73         this.a1ClientFactory = a1ClientFactory;
  74         this.policyTypes = policyTypes;
  75         this.policies = policies;
  76         this.services = services;
  77         this.restClientFactory = restClientFactory;
  78         this.rics = rics;
  79     }
  80
  81     public void run(Ric ric) {
  82         logger.debug("Handling ric: {}", ric.getConfig().ricId());
  83
  84         if (ric.getState() == RicState.SYNCHRONIZING) {
  85             logger.debug("Ric: {} is already being synchronized", ric.getConfig().ricId());
  86             return;
  87         }
  88
  89         ric.getLock().lock(LockType.EXCLUSIVE) //
  90                 .flatMap(notUsed -> setRicState(ric)) //
  91                 .flatMap(lock -> this.a1ClientFactory.createA1Client(ric)) //
  92                 .flatMapMany(client -> runSynchronization(ric, client)) //
  93                 .onErrorResume(throwable -> deleteAllPolicyInstances(ric, throwable))
  94                 .subscribe(new BaseSubscriber<Object>() {
  95                     @Override
  96                     protected void hookOnError(Throwable throwable) {
  97                         logger.warn("Synchronization failure for ric: {}, reason: {}", ric.id(),
  98                                 throwable.getMessage());
  99                         ric.setState(RicState.UNAVAILABLE);
 100                     }
 101
 102                     @Override
 103                     protected void hookOnComplete() {
 104                         onSynchronizationComplete(ric);
 105                     }
 106
 107                     @Override
 108                     protected void hookFinally(SignalType type) {
 109                         ric.getLock().unlockBlocking();
 110                     }
 111                 });
 112     }
 113
 114     @SuppressWarnings("squid:S2445") // Blocks should be synchronized on "private final" fields
 115     private Mono<Ric> setRicState(Ric ric) {
 116         synchronized (ric) {
 117             if (ric.getState() == RicState.SYNCHRONIZING) {
 118                 logger.debug("Ric: {} is already being synchronized", ric.getConfig().ricId());
 119                 return Mono.empty();
 120             }
 121             ric.setState(RicState.SYNCHRONIZING);
 122             return Mono.just(ric);
 123         }
 124     }
 125
 126     private Flux<Object> runSynchronization(Ric ric, A1Client a1Client) {
 127         Flux<PolicyType> synchronizedTypes = synchronizePolicyTypes(ric, a1Client);
 128         Flux<?> policiesDeletedInRic = a1Client.deleteAllPolicies();
 129         Flux<Policy> policiesRecreatedInRic = recreateAllPoliciesInRic(ric, a1Client);
 130
 131         return Flux.concat(synchronizedTypes, policiesDeletedInRic, policiesRecreatedInRic);
 132     }
 133
 134     private void onSynchronizationComplete(Ric ric) {
 135         if (this.rics.get(ric.id()) == null) {
 136             logger.debug("Policies removed in removed ric: {}", ric.id());
 137             return;
 138         }
 139         logger.debug("Synchronization completed for: {}", ric.id());
 140         ric.setState(RicState.AVAILABLE);
 141         notifyServices(ric);
 142     }
 143
 144     private Flux<Object> deleteAllPolicyInstances(Ric ric, Throwable t) {
 145         logger.debug("Recreation of policies failed for ric: {}, reason: {}", ric.id(), t.getMessage());
 146         deleteAllPoliciesInRepository(ric);
 147
 148         Flux<PolicyType> synchronizedTypes = this.a1ClientFactory.createA1Client(ric) //
 149                 .flatMapMany(a1Client -> synchronizePolicyTypes(ric, a1Client));
 150         Flux<?> deletePoliciesInRic = this.a1ClientFactory.createA1Client(ric) //
 151                 .flatMapMany(A1Client::deleteAllPolicies) //
 152                 .doOnComplete(() -> deleteAllPoliciesInRepository(ric));
 153
 154         return Flux.concat(synchronizedTypes, deletePoliciesInRic);
 155     }
 156
 157     void notifyServices(Ric ric) {
 158         ServiceCallbacks callbacks = new ServiceCallbacks(this.restClientFactory);
 159         callbacks.notifyServicesRicSynchronized(ric, services);
 160     }
 161
 162     private Flux<PolicyType> synchronizePolicyTypes(Ric ric, A1Client a1Client) {
 163         return a1Client.getPolicyTypeIdentities() //
 164                 .doOnNext(x -> ric.clearSupportedPolicyTypes()) //
 165                 .flatMapMany(Flux::fromIterable) //
 166                 .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().ricId(), typeId)) //
 167                 .flatMap(policyTypeId -> getPolicyType(policyTypeId, a1Client), CONCURRENCY_RIC) //
 168                 .doOnNext(ric::addSupportedPolicyType); //
 169     }
 170
 171     private Mono<PolicyType> getPolicyType(String policyTypeId, A1Client a1Client) {
 172         if (policyTypes.contains(policyTypeId)) {
 173             return Mono.just(policyTypes.get(policyTypeId));
 174         }
 175         return a1Client.getPolicyTypeSchema(policyTypeId) //
 176                 .flatMap(schema -> createPolicyType(policyTypeId, schema));
 177     }
 178
 179     private Mono<PolicyType> createPolicyType(String policyTypeId, String schema) {
 180         PolicyType pt = ImmutablePolicyType.builder().id(policyTypeId).schema(schema).build();
 181         policyTypes.put(pt);
 182         return Mono.just(pt);
 183     }
 184
 185     private void deleteAllPoliciesInRepository(Ric ric) {
 186         for (Policy policy : policies.getForRic(ric.id())) {
 187             this.policies.remove(policy);
 188         }
 189     }
 190
 191     private Flux<Policy> putPolicy(Policy policy, Ric ric, A1Client a1Client) {
 192         logger.debug("Recreating policy: {}, for ric: {}", policy.id(), ric.getConfig().ricId());
 193         return a1Client.putPolicy(policy) //
 194                 .flatMapMany(notUsed -> Flux.just(policy));
 195     }
 196
 197     private boolean checkTransient(Policy policy) {
 198         if (policy.isTransient()) {
 199             this.policies.remove(policy);
 200         }
 201         return policy.isTransient();
 202     }
 203
 204     private Flux<Policy> recreateAllPoliciesInRic(Ric ric, A1Client a1Client) {
 205         return Flux.fromIterable(policies.getForRic(ric.id())) //
 206                 .filter(policy -> !checkTransient(policy)) //
 207                 .flatMap(policy -> putPolicy(policy, ric, a1Client), CONCURRENCY_RIC);
 208     }
 209
 210 }