SEBSERV-885 better logging

Author: anhefti

src/main/java/ch/ethz/seb/sps/server/datalayer/dao/impl/SessionDAOBatis.java

@@ -513,6 +513,9 @@ public Result<EntityKey> secureDeleteSession(final String sessionUUID) {
                     .execute();
 
             // secure delete all images
+            if (log.isDebugEnabled()) {
+                log.debug("Secure delete all Screenshots for session {}, screenshots: {}", sessionUUID, screenShotPKs);
+            }
             this.screenshotDAO
                     .secureDeleteAllForSession(sessionUUID, screenShotPKs)
                     .getOrThrow();
@@ -531,6 +534,7 @@ public Result<EntityKey> secureDeleteSession(final String sessionUUID) {
 
             sessionRecordMapper.deleteByPrimaryKey(sessionPK);
 
+            log.info("Successfully and securely delete user session data: {}", sessionUUID);
             return new EntityKey(sessionUUID, EntityType.SESSION);
         });
     }

src/main/java/ch/ethz/seb/sps/server/weblayer/AdminSessionController.java

@@ -169,6 +169,8 @@ protected Session createNew(final POSTMapper postParams) {
             produces = MediaType.APPLICATION_JSON_VALUE)
     public Collection<EntityKey> secureDelete(@PathVariable final String modelId) {
 
+        log.info("Got secure session deletion request for session:  {}", modelId);
+
         return this.entityDAO.byModelId(modelId)
                 .flatMap(this::checkWriteAccess)
                 .flatMap(this::validForDelete)