Introduce error handling in StartupService

[nonrtric.git] / policy-agent / src / main / java / org / oransc / policyagent / tasks / StartupService.java

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/tasks/StartupService.java b/policy-agent/src/main/java/org/oransc/policyagent/tasks/StartupService.java
index a6accbb..8bfa81e 100644 (file)
--- a/policy-agent/src/main/java/org/oransc/policyagent/tasks/StartupService.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/tasks/StartupService.java
@@ -20,10 +20,9 @@
 
 package org.oransc.policyagent.tasks;
 
-import java.util.Vector;
-import org.oransc.policyagent.clients.RicClient;
+import org.oransc.policyagent.clients.A1Client;
 import org.oransc.policyagent.configuration.ApplicationConfig;
-import org.oransc.policyagent.configuration.RicConfig;
+import org.oransc.policyagent.repository.ImmutablePolicyType;
 import org.oransc.policyagent.repository.PolicyType;
 import org.oransc.policyagent.repository.PolicyTypes;
 import org.oransc.policyagent.repository.Ric;
@@ -33,6 +32,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
 
 /**
  * Loads information about RealTime-RICs at startup.
@@ -52,13 +53,13 @@ public class StartupService {
     PolicyTypes policyTypes;
 
     @Autowired
-    private RicClient ricClient;
+    private A1Client a1Client;
 
-    StartupService(ApplicationConfig appConfig, Rics rics, PolicyTypes policyTypes, RicClient ricClient) {
+    StartupService(ApplicationConfig appConfig, Rics rics, PolicyTypes policyTypes, A1Client a1Client) {
         this.applicationConfig = appConfig;
         this.rics = rics;
         this.policyTypes = policyTypes;
-        this.ricClient = ricClient;
+        this.a1Client = a1Client;
     }
 
     /**
@@ -66,22 +67,61 @@ public class StartupService {
      */
     public void startup() {
         applicationConfig.initialize();
-        Vector<RicConfig> ricConfigs = applicationConfig.getRicConfigs();
-        for (RicConfig ricConfig : ricConfigs) {
-            Ric ric = new Ric(ricConfig);
-            String baseUrl = ricConfig.baseUrl();
-            ricClient.deleteAllPolicies(baseUrl);
-            Vector<PolicyType> types = ricClient.getPolicyTypes(baseUrl);
-            for (PolicyType policyType : types) {
-                if (!policyTypes.contains(policyType)) {
-                    policyTypes.put(policyType);
-                }
-            }
-            ric.addSupportedPolicyTypes(types);
-            ric.setState(RicState.ACTIVE);
-            rics.put(ric);
+        Flux.fromIterable(applicationConfig.getRicConfigs()) //
+            .map(ricConfig -> new Ric(ricConfig)) //
+            .doOnNext(ric -> logger.debug("Handling ric: {}", ric.getConfig().name())) //
+            .flatMap(this::addPolicyTypesForRic) //
+            .flatMap(this::deletePoliciesForRic) //
+            .flatMap(this::addRicToRepo) //
+            .subscribe();
+    }
+
+    private Mono<Ric> addPolicyTypesForRic(Ric ric) {
+        a1Client.getPolicyTypeIdentities(ric.getConfig().baseUrl()) //
+            .doOnNext(typeId -> logger.debug("For ric: {}, handling type: {}", ric.getConfig().name(), typeId))
+            .flatMap(this::addTypeToRepo) //
+            .flatMap(type -> addTypeToRic(ric, type)) //
+            .subscribe(null, cause -> setRicToNotReachable(ric, cause), () -> setRicToActive(ric));
+        return Mono.just(ric);
+    }
+
+    private Mono<PolicyType> addTypeToRepo(String policyTypeId) {
+        ImmutablePolicyType type = ImmutablePolicyType.builder().name(policyTypeId).build();
+        if (!policyTypes.contains(policyTypeId)) {
+            policyTypes.put(type);
         }
+        return Mono.just(type);
+    }
 
+    private Mono<Void> addTypeToRic(Ric ric, PolicyType policyType) {
+        ric.addSupportedPolicyType(policyType);
+        return Mono.empty();
     }
 
+    private Mono<Ric> deletePoliciesForRic(Ric ric) {
+        if (!Ric.RicState.NOT_REACHABLE.equals(ric.state())) {
+            a1Client.getPolicyIdentities(ric.getConfig().baseUrl()) //
+                .doOnNext(
+                    policyId -> logger.debug("Deleting policy: {}, for ric: {}", policyId, ric.getConfig().name()))
+                .flatMap(policyId -> a1Client.deletePolicy(ric.getConfig().baseUrl(), policyId)) //
+                .subscribe(null, cause -> setRicToNotReachable(ric, cause), null);
+        }
+
+        return Mono.just(ric);
+    }
+
+    private void setRicToNotReachable(Ric ric, Throwable t) {
+        ric.setState(Ric.RicState.NOT_REACHABLE);
+        logger.info("Unable to connect to ric {}. Cause: {}", ric.name(), t.getMessage());
+    }
+
+    private void setRicToActive(Ric ric) {
+        ric.setState(RicState.ACTIVE);
+    }
+
+    private Mono<Void> addRicToRepo(Ric ric) {
+        rics.put(ric);
+
+        return Mono.empty();
+    }
 }