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 import reactor.core.publisher.Flux;
  36 import reactor.core.publisher.Mono;
  37
  38 /**
  39  * Loads information about RealTime-RICs at startup.
  40  */
  41 @Service("startupService")
  42 public class StartupService {
  43
  44     private static final Logger logger = LoggerFactory.getLogger(StartupService.class);
  45
  46     @Autowired
  47     ApplicationConfig applicationConfig;
  48
  49     @Autowired
  50     private Rics rics;
  51
  52     @Autowired
  53     PolicyTypes policyTypes;
  54
  55     @Autowired
  56     private A1Client a1Client;
  57
  58     StartupService(ApplicationConfig appConfig, Rics rics, PolicyTypes policyTypes, A1Client a1Client) {
  59         this.applicationConfig = appConfig;
  60         this.rics = rics;
  61         this.policyTypes = policyTypes;
  62         this.a1Client = a1Client;
  63     }
  64
  65     /**
  66      * Reads the configured Rics and performs the service discovery. The result is put into the repository.
  67      */
  68     public void startup() {
  69         applicationConfig.initialize();
  70         Flux.fromIterable(applicationConfig.getRicConfigs()) //
  71             .map(ricConfig -> new Ric(ricConfig)) //
  72             .doOnNext(ric -> logger.debug("Handling ric: {}", ric.getConfig().name())) //
  73             .flatMap(this::addPolicyTypesForRic) //
  74             .flatMap(this::deletePoliciesForRic) //
  75             .flatMap(this::addRicToRepo) //
  76             .subscribe();
  77     }
  78
  79     private Mono<Ric> addPolicyTypesForRic(Ric ric) {
  80         a1Client.getPolicyTypeIdentities(ric.getConfig().baseUrl()) //
  81             .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().name(), typeId))
  82             .flatMap(this::addTypeToRepo) //
  83             .flatMap(type -> addTypeToRic(ric, type)) //
  84             .subscribe(null, cause -> setRicToNotReachable(ric, cause), () -> setRicToActive(ric));
  85         return Mono.just(ric);
  86     }
  87
  88     private Mono<PolicyType> addTypeToRepo(String policyTypeId) {
  89         ImmutablePolicyType type = ImmutablePolicyType.builder().name(policyTypeId).build();
  90         if (!policyTypes.contains(policyTypeId)) {
  91             policyTypes.put(type);
  92         }
  93         return Mono.just(type);
  94     }
  95
  96     private Mono<Void> addTypeToRic(Ric ric, PolicyType policyType) {
  97         ric.addSupportedPolicyType(policyType);
  98         return Mono.empty();
  99     }
 100
 101     private Mono<Ric> deletePoliciesForRic(Ric ric) {
 102         if (!Ric.RicState.NOT_REACHABLE.equals(ric.state())) {
 103             a1Client.getPolicyIdentities(ric.getConfig().baseUrl()) //
 104                 .doOnNext(
 105                     policyId -> logger.debug("Deleting policy: {}, for ric: {}", policyId, ric.getConfig().name()))
 106                 .flatMap(policyId -> a1Client.deletePolicy(ric.getConfig().baseUrl(), policyId)) //
 107                 .subscribe(null, cause -> setRicToNotReachable(ric, cause), null);
 108         }
 109
 110         return Mono.just(ric);
 111     }
 112
 113     private void setRicToNotReachable(Ric ric, Throwable t) {
 114         ric.setState(Ric.RicState.NOT_REACHABLE);
 115         logger.info("Unable to connect to ric {}. Cause: {}", ric.name(), t.getMessage());
 116     }
 117
 118     private void setRicToActive(Ric ric) {
 119         ric.setState(RicState.ACTIVE);
 120     }
 121
 122     private Mono<Void> addRicToRepo(Ric ric) {
 123         rics.put(ric);
 124
 125         return Mono.empty();
 126     }
 127 }