diff -r 9a81a11be70e -r e71ae69c68c0 src/main/kotlin/de/uapcore/lightpit/DataSourceProvider.kt
--- a/src/main/kotlin/de/uapcore/lightpit/DataSourceProvider.kt	Sun Dec 12 18:16:46 2021 +0100
+++ b/src/main/kotlin/de/uapcore/lightpit/DataSourceProvider.kt	Wed Dec 15 19:56:05 2021 +0100
@@ -38,7 +38,9 @@
  * Provides access to the database.
  */
 @WebListener
-class DataSourceProvider : ServletContextListener, LoggingTrait {
+class DataSourceProvider : ServletContextListener {
+
+    private val logger = MyLogger()
 
     enum class Dialect {
         Postgres
@@ -100,7 +102,7 @@
                     )
                 }
                 val metaData = conn.metaData
-                logger().info(
+                logger.info(
                     "Connections as {} to {}/{} ready to go.",
                     metaData.userName,
                     metaData.url,
@@ -108,18 +110,18 @@
                 )
             }
         } catch (ex: SQLException) {
-            logger().error("Checking database connection failed", ex)
+            logger.error("Checking database connection failed", ex)
         }
     }
 
     private fun retrieveDataSource(ctx: Context): DataSource? {
         return try {
             val ret = ctx.lookup(DS_JNDI_NAME) as DataSource
-            logger().info("Data source retrieved.")
+            logger.info("Data source retrieved.")
             ret
         } catch (ex: NamingException) {
-            logger().error("Data source {} not available.", DS_JNDI_NAME)
-            logger().error("Reason for the missing data source: ", ex)
+            logger.error("Data source {0} not available.", DS_JNDI_NAME)
+            logger.error("Reason for the missing data source: ", ex)
             null
         }
     }
@@ -132,8 +134,8 @@
             try {
                 dialect = Dialect.valueOf(dbDialect)
             } catch (ex: IllegalArgumentException) {
-                logger().error(
-                    "Unknown or unsupported database dialect {}. Defaulting to {}.",
+                logger.error(
+                    "Unknown or unsupported database dialect {0}. Defaulting to {1}.",
                     dbDialect,
                     dialect
                 )
@@ -141,22 +143,22 @@
         }
 
         dataSource = try {
-            logger().debug("Trying to access JNDI context ...")
+            logger.debug("Trying to access JNDI context ...")
             val initialCtx: Context = InitialContext()
             val ctx = initialCtx.lookup("java:comp/env") as Context
             retrieveDataSource(ctx)
         } catch (ex: NamingException) {
-            logger().error("Cannot access JNDI resources.", ex)
+            logger.error("Cannot access JNDI resources.", ex)
             null
         } catch (ex: ClassCastException) {
-            logger().error("Cannot access JNDI resources.", ex)
+            logger.error("Cannot access JNDI resources.", ex)
             null
         }
 
         dataSource?.let { checkConnection(it, dbSchema) }
 
         sc.setAttribute(SC_ATTR_NAME, this)
-        logger().info("Database facade injected into ServletContext.")
+        logger.info("Database facade injected into ServletContext.")
     }
 
     override fun contextDestroyed(sce: ServletContextEvent?) {