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.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 many 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     private final Rics rics;
  68     private final AsyncRestClientFactory restClientFactory;
  69
  70     public RicSynchronizationTask(A1ClientFactory a1ClientFactory, PolicyTypes policyTypes, Policies policies,
  71             Services services, AsyncRestClientFactory restClientFactory, Rics rics) {
  72         this.a1ClientFactory = a1ClientFactory;
  73         this.policyTypes = policyTypes;
  74         this.policies = policies;
  75         this.services = services;
  76         this.restClientFactory = restClientFactory;
  77         this.rics = rics;
  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         if (this.rics.get(ric.id()) == null) {
 135             logger.debug("Policies removed in removed ric: {}", ric.id());
 136             return;
 137         }
 138         logger.debug("Synchronization completed for: {}", ric.id());
 139         ric.setState(RicState.AVAILABLE);
 140         notifyServices(ric);
 141     }
 142
 143     private Flux<Object> deleteAllPolicyInstances(Ric ric, Throwable t) {
 144         logger.debug("Recreation of policies failed for ric: {}, reason: {}", ric.id(), t.getMessage());
 145         deleteAllPoliciesInRepository(ric);
 146
 147         Flux<PolicyType> synchronizedTypes = this.a1ClientFactory.createA1Client(ric) //
 148                 .flatMapMany(a1Client -> synchronizePolicyTypes(ric, a1Client));
 149         Flux<?> deletePoliciesInRic = this.a1ClientFactory.createA1Client(ric) //
 150                 .flatMapMany(A1Client::deleteAllPolicies) //
 151                 .doOnComplete(() -> deleteAllPoliciesInRepository(ric));
 152
 153         return Flux.concat(synchronizedTypes, deletePoliciesInRic);
 154     }
 155
 156     void notifyServices(Ric ric) {
 157         ServiceCallbacks callbacks = new ServiceCallbacks(this.restClientFactory);
 158         callbacks.notifyServicesRicSynchronized(ric, services);
 159     }
 160
 161     private Flux<PolicyType> synchronizePolicyTypes(Ric ric, A1Client a1Client) {
 162         return a1Client.getPolicyTypeIdentities() //
 163                 .doOnNext(x -> ric.clearSupportedPolicyTypes()) //
 164                 .flatMapMany(Flux::fromIterable) //
 165                 .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().ricId(), typeId)) //
 166                 .flatMap(policyTypeId -> getPolicyType(policyTypeId, a1Client), CONCURRENCY_RIC) //
 167                 .doOnNext(ric::addSupportedPolicyType); //
 168     }
 169
 170     private Mono<PolicyType> getPolicyType(String policyTypeId, A1Client a1Client) {
 171         if (policyTypes.contains(policyTypeId)) {
 172             return Mono.just(policyTypes.get(policyTypeId));
 173         }
 174         return a1Client.getPolicyTypeSchema(policyTypeId) //
 175                 .flatMap(schema -> createPolicyType(policyTypeId, schema));
 176     }
 177
 178     private Mono<PolicyType> createPolicyType(String policyTypeId, String schema) {
 179         PolicyType pt = PolicyType.builder().id(policyTypeId).schema(schema).build();
 180         policyTypes.put(pt);
 181         return Mono.just(pt);
 182     }
 183
 184     private void deleteAllPoliciesInRepository(Ric ric) {
 185         for (Policy policy : policies.getForRic(ric.id())) {
 186             this.policies.remove(policy);
 187         }
 188     }
 189
 190     private Flux<Policy> putPolicy(Policy policy, Ric ric, A1Client a1Client) {
 191         logger.debug("Recreating policy: {}, for ric: {}", policy.getId(), ric.getConfig().ricId());
 192         return a1Client.putPolicy(policy) //
 193                 .flatMapMany(notUsed -> Flux.just(policy));
 194     }
 195
 196     private boolean checkTransient(Policy policy) {
 197         if (policy.isTransient()) {
 198             this.policies.remove(policy);
 199         }
 200         return policy.isTransient();
 201     }
 202
 203     private Flux<Policy> recreateAllPoliciesInRic(Ric ric, A1Client a1Client) {
 204         return Flux.fromIterable(policies.getForRic(ric.id())) //
 205                 .filter(policy -> !checkTransient(policy)) //
 206                 .flatMap(policy -> putPolicy(policy, ric, a1Client), CONCURRENCY_RIC);
 207     }
 208
 209 }