Python Programming Blueprints

Creating the Dependency Provider

We will now need to expose our TemplateRenderer as a Nameko Dependency Provider. In the jinja2.py file we made earlier, update our imports to include the following:

from nameko.extensions import DependencyProvider 

Then add the following code:

class Jinja2(DependencyProvider): 
 
    def setup(self): 
        self.template_renderer = TemplateRenderer( 
            'temp_messenger', 'templates' 
        ) 
 
    def get_dependency(self, worker_ctx): 
        return self.template_renderer 

This is extremely similar to our previous Redis dependency. We specify a setup method that creates an instance of our TemplateRenderer and a get_dependency method that will inject it into the worker.

This is now ready to be used by our WebServer.