Add config example and remove useless function

application.properties.example

@@ -32,8 +32,6 @@ server_socket_port = 8080
 server_socket_protocol = https
 # date format
 date_format = %d/%m/%Y
-# data retention time (in years)
-retention_time = 2
 
 #optional : key for jflow server ssl configuration
 ssl_certificate = certificate.crt
@@ -87,6 +85,19 @@ work_directory = <path>/work
 # accessible by all cluster nodes
 tmp_directory = <path>/tmp
 
+# Configure different storage directory 
+# and associate retention date or duration
+#
+# eg with a duration
+[space_default]
+dir_name=default
+retention_period=3
+#
+# eg with a fix date
+[space_final]
+dir_name=directory
+retention_date=12/03/2021
+
 [ui]
 # This must be an absolute path of a directory mounted and accessible by the server 
 user_base_directory = /work/

src/ng6/config_reader.py

@@ -203,12 +203,3 @@ class NG6ConfigReader(object):
         except :
             raise Exception("Failed when parsing the config file get_server_parameters !")
         
-    def get_retention_time(self):
-        """
-        return the retention time parameter
-          @return:    retention_time
-        """
-        try:
-            return self.reader.get('global', 'retention_time')
-        except :
-            raise Exception("Failed when parsing the config file get_retention_time!")