2 * ========================LICENSE_START=================================
5 * Copyright (C) 2019 Nordix Foundation
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
11 * http://www.apache.org/licenses/LICENSE-2.0
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===================================
21 package org.oransc.policyagent.tasks;
23 import static org.oransc.policyagent.repository.Ric.RicState;
25 import org.oransc.policyagent.clients.A1Client;
26 import org.oransc.policyagent.clients.A1ClientFactory;
27 import org.oransc.policyagent.clients.AsyncRestClient;
28 import org.oransc.policyagent.repository.ImmutablePolicyType;
29 import org.oransc.policyagent.repository.Lock.LockType;
30 import org.oransc.policyagent.repository.Policies;
31 import org.oransc.policyagent.repository.Policy;
32 import org.oransc.policyagent.repository.PolicyType;
33 import org.oransc.policyagent.repository.PolicyTypes;
34 import org.oransc.policyagent.repository.Ric;
35 import org.oransc.policyagent.repository.Service;
36 import org.oransc.policyagent.repository.Services;
37 import org.slf4j.Logger;
38 import org.slf4j.LoggerFactory;
40 import reactor.core.publisher.BaseSubscriber;
41 import reactor.core.publisher.Flux;
42 import reactor.core.publisher.Mono;
43 import reactor.core.publisher.SignalType;
46 * Synchronizes the content of a RIC with the content in the repository. This
49 * load all policy types
51 * send all policy instances to the RIC
53 * if that fails remove all policy instances
55 * Notify subscribing services
57 @SuppressWarnings("squid:S2629") // Invoke method(s) only conditionally
58 public class RicSynchronizationTask {
60 private static final Logger logger = LoggerFactory.getLogger(RicSynchronizationTask.class);
62 private final A1ClientFactory a1ClientFactory;
63 private final PolicyTypes policyTypes;
64 private final Policies policies;
65 private final Services services;
67 public RicSynchronizationTask(A1ClientFactory a1ClientFactory, PolicyTypes policyTypes, Policies policies,
69 this.a1ClientFactory = a1ClientFactory;
70 this.policyTypes = policyTypes;
71 this.policies = policies;
72 this.services = services;
75 public void run(Ric ric) {
76 logger.debug("Handling ric: {}", ric.getConfig().name());
78 if (ric.getState() == RicState.SYNCHRONIZING) {
79 logger.debug("Ric: {} is already being synchronized", ric.getConfig().name());
83 ric.getLock().lock(LockType.EXCLUSIVE) //
84 .flatMap(notUsed -> setRicState(ric)) //
85 .flatMap(lock -> this.a1ClientFactory.createA1Client(ric)) //
86 .flatMapMany(client -> runSynchronization(ric, client)) //
87 .onErrorResume(throwable -> deleteAllPolicyInstances(ric, throwable))
88 .subscribe(new BaseSubscriber<Object>() {
90 protected void hookOnError(Throwable throwable) {
91 logger.warn("Synchronization failure for ric: {}, reason: {}", ric.name(), throwable.getMessage());
92 ric.setState(RicState.UNDEFINED);
96 protected void hookOnComplete() {
97 onSynchronizationComplete(ric);
101 protected void hookFinally(SignalType type) {
102 ric.getLock().unlockBlocking();
107 @SuppressWarnings("squid:S2445") // Blocks should be synchronized on "private final" fields
108 private Mono<Ric> setRicState(Ric ric) {
110 if (ric.getState() == RicState.SYNCHRONIZING) {
111 logger.debug("Ric: {} is already being synchronized", ric.getConfig().name());
114 ric.setState(RicState.SYNCHRONIZING);
115 return Mono.just(ric);
119 private Flux<Object> runSynchronization(Ric ric, A1Client a1Client) {
120 Flux<PolicyType> synchronizedTypes = synchronizePolicyTypes(ric, a1Client);
121 Flux<?> policiesDeletedInRic = a1Client.deleteAllPolicies();
122 Flux<Policy> policiesRecreatedInRic = recreateAllPoliciesInRic(ric, a1Client);
124 return Flux.concat(synchronizedTypes, policiesDeletedInRic, policiesRecreatedInRic);
127 private void onSynchronizationComplete(Ric ric) {
128 logger.debug("Synchronization completed for: {}", ric.name());
129 ric.setState(RicState.IDLE);
130 notifyAllServices("Synchronization completed for:" + ric.name());
133 private void notifyAllServices(String body) {
134 for (Service service : services.getAll()) {
135 String url = service.getCallbackUrl();
136 if (service.getCallbackUrl().length() > 0) {
137 createNotificationClient(url) //
140 notUsed -> logger.debug("Service {} notified", service.getName()), throwable -> logger
141 .warn("Service notification failed for service: {}", service.getName(), throwable),
142 () -> logger.debug("All services notified"));
147 private Flux<Object> deleteAllPolicyInstances(Ric ric, Throwable t) {
148 logger.warn("Recreation of policies failed for ric: {}, reason: {}", ric.name(), t.getMessage());
149 deleteAllPoliciesInRepository(ric);
151 Flux<PolicyType> synchronizedTypes = this.a1ClientFactory.createA1Client(ric) //
152 .flatMapMany(a1Client -> synchronizePolicyTypes(ric, a1Client));
153 Flux<?> deletePoliciesInRic = this.a1ClientFactory.createA1Client(ric) //
154 .flatMapMany(A1Client::deleteAllPolicies) //
155 .doOnComplete(() -> deleteAllPoliciesInRepository(ric));
157 return Flux.concat(synchronizedTypes, deletePoliciesInRic);
160 AsyncRestClient createNotificationClient(final String url) {
161 return new AsyncRestClient(url);
164 private Flux<PolicyType> synchronizePolicyTypes(Ric ric, A1Client a1Client) {
165 return a1Client.getPolicyTypeIdentities() //
166 .doOnNext(x -> ric.clearSupportedPolicyTypes()) //
167 .flatMapMany(Flux::fromIterable) //
168 .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().name(), typeId)) //
169 .flatMap(policyTypeId -> getPolicyType(policyTypeId, a1Client)) //
170 .doOnNext(ric::addSupportedPolicyType); //
173 private Mono<PolicyType> getPolicyType(String policyTypeId, A1Client a1Client) {
174 if (policyTypes.contains(policyTypeId)) {
175 return Mono.just(policyTypes.get(policyTypeId));
177 return a1Client.getPolicyTypeSchema(policyTypeId) //
178 .flatMap(schema -> createPolicyType(policyTypeId, schema));
181 private Mono<PolicyType> createPolicyType(String policyTypeId, String schema) {
182 PolicyType pt = ImmutablePolicyType.builder().name(policyTypeId).schema(schema).build();
184 return Mono.just(pt);
187 private void deleteAllPoliciesInRepository(Ric ric) {
188 for (Policy policy : policies.getForRic(ric.name())) {
189 this.policies.remove(policy);
193 private Flux<Policy> putPolicy(Policy policy, Ric ric, A1Client a1Client) {
194 logger.debug("Recreating policy: {}, for ric: {}", policy.id(), ric.getConfig().name());
195 return a1Client.putPolicy(policy) //
196 .flatMapMany(notUsed -> Flux.just(policy));
199 private Flux<Policy> recreateAllPoliciesInRic(Ric ric, A1Client a1Client) {
200 return Flux.fromIterable(policies.getForRic(ric.name())) //
201 .flatMap(policy -> putPolicy(policy, ric, a1Client));