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::addRicToRepo) //
  77             .subscribe();
  78     }
  79
  80     private Mono<Ric> addPolicyTypesForRic(Ric ric) {
  81         a1Client.getPolicyTypeIdentities(ric.getConfig().baseUrl()) //
  82             .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().name(), typeId))
  83             .flatMap(this::addTypeToRepo) //
  84             .flatMap(type -> addTypeToRic(ric, type)) //
  85             .subscribe(null, cause -> setRicToNotReachable(ric, cause), () -> setRicToActive(ric));
  86         return Mono.just(ric);
  87     }
  88
  89     private Mono<PolicyType> addTypeToRepo(String policyTypeId) {
  90         ImmutablePolicyType type = ImmutablePolicyType.builder().name(policyTypeId).build();
  91         if (!policyTypes.contains(policyTypeId)) {
  92             policyTypes.put(type);
  93         }
  94         return Mono.just(type);
  95     }
  96
  97     private Mono<Void> addTypeToRic(Ric ric, PolicyType policyType) {
  98         ric.addSupportedPolicyType(policyType);
  99         return Mono.empty();
 100     }
 101
 102     private Mono<Ric> deletePoliciesForRic(Ric ric) {
 103         if (!Ric.RicState.NOT_REACHABLE.equals(ric.state())) {
 104             a1Client.getPolicyIdentities(ric.getConfig().baseUrl()) //
 105                 .doOnNext(
 106                     policyId -> logger.debug("Deleting policy: {}, for ric: {}", policyId, ric.getConfig().name()))
 107                 .flatMap(policyId -> a1Client.deletePolicy(ric.getConfig().baseUrl(), policyId)) //
 108                 .subscribe(null, cause -> setRicToNotReachable(ric, cause), null);
 109         }
 110
 111         return Mono.just(ric);
 112     }
 113
 114     private void setRicToNotReachable(Ric ric, Throwable t) {
 115         ric.setState(Ric.RicState.NOT_REACHABLE);
 116         logger.info("Unable to connect to ric {}. Cause: {}", ric.name(), t.getMessage());
 117     }
 118
 119     private void setRicToActive(Ric ric) {
 120         ric.setState(RicState.ACTIVE);
 121     }
 122
 123     private Mono<Void> addRicToRepo(Ric ric) {
 124         rics.put(ric);
 125
 126         return Mono.empty();
 127     }
 128 }