Add webserver support for mr simulator

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

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/tasks/RefreshConfigTask.java b/policy-agent/src/main/java/org/oransc/policyagent/tasks/RefreshConfigTask.java
index de4a771..05bcb0f 100644 (file)
--- a/policy-agent/src/main/java/org/oransc/policyagent/tasks/RefreshConfigTask.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/tasks/RefreshConfigTask.java
@@ -24,7 +24,6 @@ import com.google.gson.GsonBuilder;
 import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
-import com.google.gson.JsonSyntaxException;
 import com.google.gson.TypeAdapterFactory;
 
 import java.io.BufferedInputStream;
@@ -70,7 +69,8 @@ import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
 /**
- * Regularly refreshes the configuration from Consul.
+ * Regularly refreshes the configuration from Consul or from a local
+ * configuration file.
  */
 @Component
 public class RefreshConfigTask {
@@ -109,7 +109,7 @@ public class RefreshConfigTask {
         stop();
         refreshTask = createRefreshTask() //
             .subscribe(notUsed -> logger.debug("Refreshed configuration data"),
-                throwable -> logger.error("Configuration refresh terminated due to exception", throwable),
+                throwable -> logger.error("Configuration refresh terminated due to exception {}", throwable.toString()),
                 () -> logger.error("Configuration refresh terminated"));
     }
 
@@ -121,20 +121,20 @@ public class RefreshConfigTask {
 
     Flux<RicConfigUpdate.Type> createRefreshTask() {
         Flux<JsonObject> loadFromFile = Flux.interval(Duration.ZERO, FILE_CONFIG_REFRESH_INTERVAL) //
-            .filter(notUsed -> configFileExists()) //
             .filter(notUsed -> !this.isConsulUsed) //
             .flatMap(notUsed -> loadConfigurationFromFile()) //
-            .onErrorResume(this::ignoreError) //
-            .doOnNext(json -> logger.debug("loadFromFile")) //
+            .onErrorResume(this::ignoreErrorFlux) //
+            .doOnNext(json -> logger.debug("loadFromFile succeeded")) //
             .doOnTerminate(() -> logger.error("loadFromFile Terminate"));
 
-        Flux<JsonObject> loadFromConsul = getEnvironment(systemEnvironment) //
+        Flux<JsonObject> loadFromConsul = Flux.interval(Duration.ZERO, CONSUL_CONFIG_REFRESH_INTERVAL) //
+            .flatMap(i -> getEnvironment(systemEnvironment)) //
             .flatMap(this::createCbsClient) //
-            .flatMapMany(this::periodicConfigurationUpdates) //
-            .onErrorResume(this::ignoreError) //
-            .doOnNext(json -> logger.debug("loadFromConsul")) //
+            .flatMap(this::getFromCbs) //
+            .onErrorResume(this::ignoreErrorMono) //
+            .doOnNext(json -> logger.debug("loadFromConsul succeeded")) //
             .doOnNext(json -> this.isConsulUsed = true) //
-            .doOnTerminate(() -> logger.error("loadFromConsul Terminate"));
+            .doOnTerminate(() -> logger.error("loadFromConsul Terminated"));
 
         return Flux.merge(loadFromFile, loadFromConsul) //
             .flatMap(this::parseConfiguration) //
@@ -145,43 +145,53 @@ public class RefreshConfigTask {
     }
 
     Mono<EnvProperties> getEnvironment(Properties systemEnvironment) {
-        return EnvironmentProcessor.readEnvironmentVariables(systemEnvironment);
+        return EnvironmentProcessor.readEnvironmentVariables(systemEnvironment) //
+            .onErrorResume(t -> Mono.empty());
     }
 
     Mono<CbsClient> createCbsClient(EnvProperties env) {
-        return CbsClientFactory.createCbsClient(env);
+        return CbsClientFactory.createCbsClient(env) //
+            .onErrorResume(this::ignoreErrorMono);
     }
 
-    private Flux<JsonObject> periodicConfigurationUpdates(CbsClient cbsClient) {
-        final Duration initialDelay = Duration.ZERO;
+    private Mono<JsonObject> getFromCbs(CbsClient cbsClient) {
         final CbsRequest getConfigRequest = CbsRequests.getAll(RequestDiagnosticContext.create());
-        return cbsClient.updates(getConfigRequest, initialDelay, CONSUL_CONFIG_REFRESH_INTERVAL);
+        try {
+            return cbsClient.get(getConfigRequest) //
+                .onErrorResume(this::ignoreErrorMono);
+        } catch (Exception e) {
+            return ignoreErrorMono(e);
+        }
+    }
+
+    private <R> Flux<R> ignoreErrorFlux(Throwable throwable) {
+        String errMsg = throwable.toString();
+        logger.warn("Could not refresh application configuration. {}", errMsg);
+        return Flux.empty();
     }
 
-    private <R> Mono<R> ignoreError(Throwable throwable) {
+    private <R> Mono<R> ignoreErrorMono(Throwable throwable) {
         String errMsg = throwable.toString();
         logger.warn("Could not refresh application configuration. {}", errMsg);
         return Mono.empty();
     }
 
-    private Mono<ApplicationConfigParser> parseConfiguration(JsonObject jsonObject) {
+    private Mono<ApplicationConfigParser.ConfigParserResult> parseConfiguration(JsonObject jsonObject) {
         try {
             ApplicationConfigParser parser = new ApplicationConfigParser();
-            parser.parse(jsonObject);
-            return Mono.just(parser);
-        } catch (ServiceException e) {
-            logger.error("Could not parse configuration {}", e.toString(), e);
-            return Mono.error(e);
+            return Mono.just(parser.parse(jsonObject));
+        } catch (Exception e) {
+            String str = e.toString();
+            logger.error("Could not parse configuration {}", str);
+            return Mono.empty();
         }
     }
 
-    private Flux<RicConfigUpdate> updateConfig(ApplicationConfigParser config) {
-        return this.appConfig.setConfiguration(config.getRicConfigs(), config.getDmaapPublisherConfig(),
-            config.getDmaapConsumerConfig());
+    private Flux<RicConfigUpdate> updateConfig(ApplicationConfigParser.ConfigParserResult config) {
+        return this.appConfig.setConfiguration(config);
     }
 
-    boolean configFileExists() {
-        String filepath = appConfig.getLocalConfigurationFilePath();
+    boolean fileExists(String filepath) {
         return (filepath != null && (new File(filepath).exists()));
     }
 
@@ -223,6 +233,10 @@ public class RefreshConfigTask {
      */
     Flux<JsonObject> loadConfigurationFromFile() {
         String filepath = appConfig.getLocalConfigurationFilePath();
+        if (!fileExists(filepath)) {
+            return Flux.empty();
+        }
+
         GsonBuilder gsonBuilder = new GsonBuilder();
         ServiceLoader.load(TypeAdapterFactory.class).forEach(gsonBuilder::registerTypeAdapterFactory);
 
@@ -232,8 +246,8 @@ public class RefreshConfigTask {
             appParser.parse(rootObject);
             logger.debug("Local configuration file loaded: {}", filepath);
             return Flux.just(rootObject);
-        } catch (JsonSyntaxException | ServiceException | IOException e) {
-            logger.debug("Local configuration file not loaded: {}", filepath, e);
+        } catch (IOException | ServiceException e) {
+            logger.error("Local configuration file not loaded: {}, {}", filepath, e.getMessage());
             return Flux.empty();
         }
     }