added logging to initializer service

chatto/src/main/java/org/ros/chatto/service/DBInitializerService.java

@@ -15,6 +15,8 @@ import java.util.stream.Collectors;
 import org.ros.chatto.model.ApplicationStatus;
 import org.ros.chatto.model.UserSession;
 import org.ros.chatto.repository.UserSessionRepository;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.context.event.ApplicationReadyEvent;
@@ -53,6 +55,8 @@ public class DBInitializerService {
 	@Autowired
 	private UserSessionRepository userSessionRepository;
 	
+	private final Logger logger = LoggerFactory.getLogger(DBInitializerService.class);
+	
 
 	public void connectDB() throws SQLException {
 		connection = DriverManager.getConnection(url, userName, password);
@@ -79,13 +83,14 @@ public class DBInitializerService {
 		
 		connectDB();
 
-		System.out.println("Hello world, I have just started up");
-		
+		logger.info("Application Started - running initializer service");
 //		System.out.println("Checking database and application state");
 //
 
-		if (getNumTables() == 0)
+		if (getNumTables() == 0) {
+			logger.info("Database is empty. Populating tables and roles");
 			populateDB();
+		}
 		closeConnection();
 
 		resetAllUserSessions(userSessionRepository.findAll());