Merge "Swagger documentation"

[nonrtric.git] / policy-agent / src / main / java / org / oransc / policyagent / configuration / ApplicationConfig.java

diff --git a/policy-agent/src/main/java/org/oransc/policyagent/configuration/ApplicationConfig.java b/policy-agent/src/main/java/org/oransc/policyagent/configuration/ApplicationConfig.java
index 79c82a7..e41f55e 100644 (file)
--- a/policy-agent/src/main/java/org/oransc/policyagent/configuration/ApplicationConfig.java
+++ b/policy-agent/src/main/java/org/oransc/policyagent/configuration/ApplicationConfig.java
@@ -32,6 +32,7 @@ import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.time.Duration;
 import java.util.Optional;
 import java.util.Properties;
 import java.util.ServiceLoader;
@@ -40,6 +41,12 @@ import java.util.Vector;
 import javax.validation.constraints.NotEmpty;
 import javax.validation.constraints.NotNull;
 
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClient;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsClientFactory;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.api.CbsRequests;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.CbsRequest;
+import org.onap.dcaegen2.services.sdk.rest.services.cbs.client.model.EnvProperties;
+import org.onap.dcaegen2.services.sdk.rest.services.model.logging.RequestDiagnosticContext;
 import org.oransc.policyagent.exceptions.ServiceException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -47,10 +54,11 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
-import org.springframework.stereotype.Component;
+
+import reactor.core.Disposable;
+import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
-@Component
 @EnableConfigurationProperties
 @ConfigurationProperties("app")
 public class ApplicationConfig {
@@ -59,6 +67,8 @@ public class ApplicationConfig {
     @Value("#{systemEnvironment}")
     Properties systemEnvironment;
 
+    private Disposable refreshConfigTask = null;
+
     @NotEmpty
     private String filepath;
 
@@ -76,28 +86,89 @@ public class ApplicationConfig {
         return this.ricConfigs;
     }
 
-    public Optional<RicConfig> getRicConfig(String managedElementId) {
+    public Optional<RicConfig> lookupRicConfigForManagedElement(String managedElementId) {
         for (RicConfig ricConfig : getRicConfigs()) {
             if (ricConfig.managedElementIds().contains(managedElementId)) {
                 return Optional.of(ricConfig);
-
             }
         }
         return Optional.empty();
     }
 
+    public RicConfig getRic(String ricName) throws ServiceException {
+        for (RicConfig ricConfig : getRicConfigs()) {
+            if (ricConfig.name().equals(ricName)) {
+                return ricConfig;
+            }
+        }
+        throw new ServiceException("Could not find ric: " + ricName);
+    }
+
     public void initialize() {
-        loadConfigurationFromFile();
+        stop();
+        loadConfigurationFromFile(this.filepath);
+
+        refreshConfigTask = createRefreshTask() //
+            .subscribe(e -> logger.info("Refreshed configuration data"),
+                throwable -> logger.error("Configuration refresh terminated due to exception", throwable),
+                () -> logger.error("Configuration refresh terminated"));
+    }
+
+    Mono<EnvProperties> getEnvironment(Properties systemEnvironment) {
+        return EnvironmentProcessor.readEnvironmentVariables(systemEnvironment);
     }
 
-    Mono<Environment.Variables> getEnvironment(Properties systemEnvironment) {
-        return Environment.readEnvironmentVariables(systemEnvironment);
+    Flux<ApplicationConfig> createRefreshTask() {
+        return getEnvironment(systemEnvironment) //
+            .flatMap(this::createCbsClient) //
+            .flatMapMany(this::periodicConfigurationUpdates) //
+            .map(this::parseRicConfigurationfromConsul) //
+            .onErrorResume(this::onErrorResume);
+    }
+
+    Mono<CbsClient> createCbsClient(EnvProperties env) {
+        return CbsClientFactory.createCbsClient(env);
+    }
+
+    private Flux<JsonObject> periodicConfigurationUpdates(CbsClient cbsClient) {
+        final Duration initialDelay = Duration.ZERO;
+        final Duration refreshPeriod = Duration.ofMinutes(1);
+        final CbsRequest getConfigRequest = CbsRequests.getAll(RequestDiagnosticContext.create());
+        return cbsClient.updates(getConfigRequest, initialDelay, refreshPeriod);
+    }
+
+    private <R> Mono<R> onErrorResume(Throwable trowable) {
+        logger.error("Could not refresh application configuration {}", trowable.toString());
+        return Mono.empty();
+    }
+
+    private ApplicationConfig parseRicConfigurationfromConsul(JsonObject jsonObject) {
+        try {
+            ApplicationConfigParser parser = new ApplicationConfigParser();
+            parser.parse(jsonObject);
+            setConfiguration(parser.getRicConfigs());
+
+        } catch (ServiceException e) {
+            logger.error("Could not parse configuration {}", e.toString(), e);
+        }
+        return this;
+    }
+
+    private synchronized void setConfiguration(@NotNull Vector<RicConfig> ricConfigs) {
+        this.ricConfigs = ricConfigs;
+    }
+
+    public void stop() {
+        if (refreshConfigTask != null) {
+            refreshConfigTask.dispose();
+            refreshConfigTask = null;
+        }
     }
 
     /**
      * Reads the configuration from file.
      */
-    void loadConfigurationFromFile() {
+    protected void loadConfigurationFromFile(String filepath) {
         GsonBuilder gsonBuilder = new GsonBuilder();
         ServiceLoader.load(TypeAdapterFactory.class).forEach(gsonBuilder::registerTypeAdapterFactory);
 
@@ -123,5 +194,4 @@ public class ApplicationConfig {
     InputStream createInputStream(@NotNull String filepath) throws IOException {
         return new BufferedInputStream(new FileInputStream(filepath));
     }
-
 }