policy-agent/src/main/java/org/oransc/policyagent/tasks/ServiceSupervision.java

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  * %%
   5  * Copyright (C) 2019 Nordix Foundation
   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.oransc.policyagent.tasks;
  22
  23 import org.oransc.policyagent.clients.A1ClientFactory;
  24 import org.oransc.policyagent.repository.Policies;
  25 import org.oransc.policyagent.repository.Policy;
  26 import org.oransc.policyagent.repository.Service;
  27 import org.oransc.policyagent.repository.Services;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30 import org.springframework.beans.factory.annotation.Autowired;
  31 import org.springframework.scheduling.annotation.EnableScheduling;
  32 import org.springframework.scheduling.annotation.Scheduled;
  33 import org.springframework.stereotype.Component;
  34
  35 import reactor.core.publisher.Flux;
  36 import reactor.core.publisher.Mono;
  37
  38 @Component
  39 @EnableScheduling
  40 public class ServiceSupervision {
  41     private static final Logger logger = LoggerFactory.getLogger(ServiceSupervision.class);
  42     private final Services services;
  43     private final Policies policies;
  44     private A1ClientFactory a1ClientFactory;
  45
  46     @Autowired
  47     public ServiceSupervision(Services services, Policies policies, A1ClientFactory a1ClientFactory) {
  48         this.services = services;
  49         this.policies = policies;
  50         this.a1ClientFactory = a1ClientFactory;
  51     }
  52
  53     @Scheduled(fixedRate = 1000 * 60)
  54     public void checkAllServices() {
  55         logger.debug("Checking services starting");
  56         createTask().subscribe(this::onPolicyDeleted, this::onError, this::onComplete);
  57     }
  58
  59     private void onPolicyDeleted(Policy policy) {
  60         logger.info("Policy deleted due to inactivity: " + policy.id() + ", service: " + policy.ownerServiceName());
  61     }
  62
  63     private void onError(Throwable t) {
  64         logger.error("Service supervision failed", t);
  65     }
  66
  67     private void onComplete() {
  68         logger.debug("Checking services completed");
  69     }
  70
  71     private Flux<Policy> createTask() {
  72         synchronized (services) {
  73             return Flux.fromIterable(services.getAll()) //
  74                 .filter(service -> service.isExpired()) //
  75                 .doOnNext(service -> logger.info("Service is expired:" + service.getName())) //
  76                 .flatMap(service -> getAllPolicies(service)) //
  77                 .doOnNext(policy -> this.policies.remove(policy)) //
  78                 .flatMap(policy -> deletePolicyInRic(policy));
  79         }
  80     }
  81
  82     private Flux<Policy> getAllPolicies(Service service) {
  83         synchronized (policies) {
  84             return Flux.fromIterable(policies.getForService(service.getName()));
  85         }
  86     }
  87
  88     private Mono<Policy> deletePolicyInRic(Policy policy) {
  89         return a1ClientFactory.createA1Client(policy.ric()) //
  90             .flatMap(client -> client.deletePolicy(policy) //
  91                 .onErrorResume(exception -> handleDeleteFromRicFailure(policy, exception)) //
  92                 .map((nothing) -> policy));
  93     }
  94
  95     private Mono<String> handleDeleteFromRicFailure(Policy policy, Throwable e) {
  96         logger.warn("Could not delete policy: {} from ric: {}", policy.id(), policy.ric().name(), e);
  97         return Mono.empty();
  98     }
  99 }