Light modules can be built with a simple text editor, with no special tools (such as Maven) required. A light module cannot incorporate java classes.
Light module structure
Example of light module structure:
Light modules can contain more or fewer folders compared to this example.
Light modules folder:
Magnolia light modules must reside within the Magnolia resources directory; this directory is also often referred to as the Magnolia light modules folder. The name and the location of this directory are arbitrary, but you must provide the path to the folder via configuration.
magnolia.resources.dir is a property defining the directory from which resources are loaded in a Magnolia instance. This directory is used for file-based resources such as light modules and for overriding classpath resources. The property is configured in
WEB-INF/config/default/magnolia.properties and has the default value
$magnolia.home/modules. To see the current value of the property, go to the Config Info tab in the About Magnolia app.
You can use symbolic links (a.k.a symlinks or soft links) in the resources directory to include light modules located elsewhere on your system.
Set the property
magnolia.resources.filesystem.observation.excludedDirectories to exclude directories from being observed for changes. (See Configuration management - magnolia.resources.filesystem.observation.excludedDirectories.)
A change in the light modules folder may also flush the server cache. You can configure this behavior under
/modules/cache/config/contentCaching/defaultPageCache/flushPolicy/policies/lightModule/pathToCacheMappings/defaultPageCache with the
pattern property, which specifies the pattern for the operation. The default value is
What items can be defined in a light module?
- App definitions
- Content type definitions
- Dialog definitions
- Field type definitions
- Media editor definitions
- Message view definitions
- Renderer definitions
- Template definitions
- Theme definitions
- Virtual URI mappings
- REST endpoint definitions
Other non YAML-based items which can be in a light module:
Creating a light module with Magnolia CLI
Using the Magnolia CLI you can create the folder structure for a light module with the command
create-light-module. Open a shell,
cd to your light modules directory, and execute the following command:
üor special characters (e.g. slashes
\and so on). The name must match the regular expression
Note that this only works if you have installed Magnolia CLI, see Magnolia CLI Installation.