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Vadi

Vadi is an IoC Container developed in order to facilitate the usage of dependency injection for Vala developers, but it can be used on any GObject-compatible language, with more or less syntax facilities.

Build & Install

Vadi requires the following dependencies:

• glib-2.0 (>= 2.64)
• gobject-2.0 (>= 2.64)
• gee-0.8
• meson
• vala

Once installed, run the following commands:

meson build --buildtype release --prefix /usr -Dtests=false
sudo ninja -C build install

Usage

In order to use Vadi, you need to declare your dependencies as public construct or construct-only properties:

public class Client : Object {
	public Service service { get; construct; }
}

If you need to specify the concrete classes to use when initializing these dependencies, you can do so by registering them in the container.

// By using register_type (), you're telling the container to use the second argument as type to
// instantiate any construct property that matches the type of the first argument.
container.register_type (typeof (Service), typeof (FoodService));

// You can use register_factory (), if you have specific steps in order to instantiate a dependency,
// or if you want to use a constructor instead of letting the container solve using the construct
// properties
container.register_factory (typeof (Service), container => {
	return new FoodService (container.resolve (typeof (Database)));
});

// Finally, if all you want is for the container to return an instance you already have pre-built,
// you can use register_instance () to pass it to it
container.register_instance (typeof (Service), a_prebuilt_service);

Then, all you need to do is to run resolve () and that's it:

var app = container.resolve (typeof (App));
app.run ();

License

This library is licensed under the GNU Lesser General Public License v3 or any later version.