(TXT) - Add examples about session values in yml files.

Author: davidjguru

_posts/2022-03-30-drupal-tips-changing-session-lifetime-for-users.md

@@ -70,7 +70,7 @@ session.gc_maxlifetime = 3600
 session.gc_probability = 1
 session.gc_divisor = 1000
 ```
-But in the Drupal context, we can change these values from a Drupal installation, inside the file `services.yml` in `docroot/sites/default/`:
+But in the Drupal context, we can change these values from a Drupal installation, inside the file `default.services.yml` in `web/sites/default/` or in `core.services.yml` in `web/core/`:
 
 ```
 parameters:
@@ -80,7 +80,7 @@ parameters:
     gc_maxlifetime: 200000
     cookie_lifetime: 2000000
 ```
-As you can see expanded in the original block:  
+As you can see expanded in the original block: from  `default.services.yml`:  
 ```
 session.storage.options:
     # Default ini options for sessions.
@@ -134,17 +134,30 @@ gc_maxlifetime: 3600 (only one hour of lifetime for the session).
 cookie_lifetime: 0 (deleted when user close the browser tab).
 ```
 
-## Overwriting default values by switching service class
+## Overwriting default values by switching service class  
 
+**The bad news** is that the above values are statically part of the service container after a Drupal installation, and cannot be modified "dynamically". And these previous values are in the by-default configuration of the Drupal installation.  
 
+**The good news** is that we can add others values by switching with another class to replace the service provision. . Besides this is part of the Container in Drupal, so can only be overwritten from a custom Drupal module using a pair of classes. We can do something like:  
+
+- `gc_maxlifetime: 3600` (only one hour of lifetime for the session, and then make the session available for the garbage collector).
+- `cookie_lifetime: 0 ` (deleted when user closes the browser tab).
+
+Only we need change the class responsible for the sessions management, used in service `session_configuration` as described in `core.services.yml`:  
+
+```
+ session_configuration:
+    class: Drupal\Core\Session\SessionConfiguration
+    arguments: ['%session.storage.options%']
+```
 
 From a ServiceProvider class, by linking the service to our new custom class:  
 
  ```
 public function alter(ContainerBuilder $container) {
     $definition = $container->getDefinition('session_configuration');
-    $definition->setClass('Drupal\st_session_manager\StSessionConfiguration');
-}
+    $definition->setClass('Drupal\custom_session_manager\StSessionConfiguration');
+  }
 ```