added the use of smartgears application managers

gcube/extra-resources/WEB-INF/web.xml

@@ -3,8 +3,7 @@
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
                       http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
-  version="4.0"
-  metadata-complete="true">
+  version="4.0">
 	  <display-name>Hello World</display-name>
 	  <description>
 		A gcube HelloWorld service - smartgears 4

src/main/java/manager/HelloWorldManager.java

@@ -0,0 +1,37 @@
+package manager;
+
+import org.gcube.common.security.providers.SecretManagerProvider;
+import org.gcube.common.security.secrets.Secret;
+import org.gcube.smartgears.ApplicationManager;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * 
+ * This class is use to Manage the application initialization and shutdown per context;
+ * The init and shutdown methods are called one per context in which the app is running 
+ * respectively at init and a shutdown time.
+ * It is connected to the app declaring it via the @ManagedBy annotation. (@see HelloWorld class)
+ * 
+ * 
+ * @author lucio
+ *
+ */
+public class HelloWorldManager implements ApplicationManager {
+
+	Logger logger = LoggerFactory.getLogger(HelloWorldManager.class); 
+	
+	@Override
+	public void onInit() {
+		Secret secret = SecretManagerProvider.get();
+		logger.debug("init called in context {}", secret.getContext());
+		
+	}
+
+	@Override
+	public void onShutdown() {
+		Secret secret = SecretManagerProvider.get();
+		logger.debug("shutDown called in context {}", secret.getContext());
+	}
+
+}

src/main/java/org/gcube/service/helloworld/services/HelloService.java

@@ -7,10 +7,15 @@ import javax.ws.rs.core.MediaType;
 
 import org.gcube.common.security.providers.SecretManagerProvider;
 import org.gcube.common.security.secrets.Secret;
+import org.gcube.smartgears.annotations.ManagedBy;
 import org.gcube.smartgears.utils.InnerMethodName;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import manager.HelloWorldManager;
+
+
+@ManagedBy(HelloWorldManager.class)
 @Path("hello")
 public class HelloService {