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62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
"""Creation of dynamic container based on some configuration example."""
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import dependency_injector.containers as containers
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# Defining several example services:
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class UsersService(object):
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"""Example users service."""
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class AuthService(object):
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"""Example auth service."""
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def import_cls(cls_name):
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"""Import class by its fully qualified name.
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In terms of current example it is just a small helper function. Please,
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don't use it in production approaches.
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"""
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path_components = cls_name.split('.')
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module = __import__('.'.join(path_components[:-1]),
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locals(),
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globals(),
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fromlist=path_components[-1:])
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return getattr(module, path_components[-1])
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# "Parsing" some configuration:
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config = {
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'services': {
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'users': {
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'class': '__main__.UsersService',
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'provider_class': 'dependency_injector.providers.Factory',
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},
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'auth': {
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'class': '__main__.AuthService',
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'provider_class': 'dependency_injector.providers.Factory',
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}
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}
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}
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# Creating empty container of service providers:
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services = containers.DynamicContainer()
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# Filling dynamic container with service providers using configuration:
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for service_name, service_info in config['services'].iteritems():
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# Runtime importing of service and service provider classes:
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service_cls = import_cls(service_info['class'])
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service_provider_cls = import_cls(service_info['provider_class'])
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# Binding service provider to the dynamic service providers catalog:
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setattr(services, service_name, service_provider_cls(service_cls))
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# Creating some objects:
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users_service = services.users()
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auth_service = services.auth()
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# Making some asserts:
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assert isinstance(users_service, UsersService)
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assert isinstance(auth_service, AuthService)
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