policy-agent/src/main/java/org/oransc/policyagent/tasks/StartupService.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.A1Client;
  24 import org.oransc.policyagent.configuration.ApplicationConfig;
  25 import org.oransc.policyagent.repository.ImmutablePolicyType;
  26 import org.oransc.policyagent.repository.PolicyType;
  27 import org.oransc.policyagent.repository.PolicyTypes;
  28 import org.oransc.policyagent.repository.Ric;
  29 import org.oransc.policyagent.repository.Ric.RicState;
  30 import org.oransc.policyagent.repository.Rics;
  31 import org.slf4j.Logger;
  32 import org.slf4j.LoggerFactory;
  33 import org.springframework.beans.factory.annotation.Autowired;
  34 import org.springframework.stereotype.Service;
  35
  36 import reactor.core.publisher.Flux;
  37 import reactor.core.publisher.Mono;
  38
  39 /**
  40  * Loads information about RealTime-RICs at startup.
  41  */
  42 @Service("startupService")
  43 public class StartupService {
  44
  45     private static final Logger logger = LoggerFactory.getLogger(StartupService.class);
  46
  47     @Autowired
  48     ApplicationConfig applicationConfig;
  49
  50     @Autowired
  51     private Rics rics;
  52
  53     @Autowired
  54     PolicyTypes policyTypes;
  55
  56     @Autowired
  57     private A1Client a1Client;
  58
  59     StartupService(ApplicationConfig appConfig, Rics rics, PolicyTypes policyTypes, A1Client a1Client) {
  60         this.applicationConfig = appConfig;
  61         this.rics = rics;
  62         this.policyTypes = policyTypes;
  63         this.a1Client = a1Client;
  64     }
  65
  66     /**
  67      * Reads the configured Rics and performs the service discovery. The result is put into the repository.
  68      */
  69     public void startup() {
  70         applicationConfig.initialize();
  71         Flux.fromIterable(applicationConfig.getRicConfigs()) //
  72             .map(ricConfig -> new Ric(ricConfig)) //
  73             .doOnNext(ric -> logger.debug("Handling ric: {}", ric.getConfig().name())) //
  74             .flatMap(this::addPolicyTypesForRic) //
  75             .flatMap(this::deletePoliciesForRic) //
  76             .flatMap(this::setRicToActive) //
  77             .flatMap(this::addRicToRepo) //
  78             .subscribe();
  79     }
  80
  81     private Mono<Ric> addPolicyTypesForRic(Ric ric) {
  82         a1Client.getPolicyTypeIdentities(ric.getConfig().baseUrl()) //
  83             .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().name(), typeId))
  84             .flatMap(this::addTypeToRepo) //
  85             .flatMap(type -> addTypeToRic(ric, type)) //
  86             .subscribe();
  87         return Mono.just(ric);
  88     }
  89
  90     private Mono<PolicyType> addTypeToRepo(String policyTypeId) {
  91         ImmutablePolicyType type = ImmutablePolicyType.builder().name(policyTypeId).build();
  92         if (!policyTypes.contains(policyTypeId)) {
  93             policyTypes.put(type);
  94         }
  95         return Mono.just(type);
  96     }
  97
  98     private Mono<Void> addTypeToRic(Ric ric, PolicyType policyType) {
  99         ric.addSupportedPolicyType(policyType);
 100         return Mono.empty();
 101     }
 102
 103     private Mono<Ric> deletePoliciesForRic(Ric ric) {
 104         a1Client.getPolicyIdentities(ric.getConfig().baseUrl()) //
 105             .doOnNext(policyId -> logger.debug("deleting policy: {}, for ric: {}", policyId, ric.getConfig().name())) //
 106             .flatMap(policyId -> a1Client.deletePolicy(ric.getConfig().baseUrl(), policyId)) //
 107             .subscribe();
 108
 109         return Mono.just(ric);
 110     }
 111
 112     private Mono<Ric> setRicToActive(Ric ric) {
 113         ric.setState(RicState.ACTIVE);
 114
 115         return Mono.just(ric);
 116     }
 117
 118     private Mono<Void> addRicToRepo(Ric ric) {
 119         rics.put(ric);
 120
 121         return Mono.empty();
 122     }
 123 }