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54 lines
1.8 KiB
Python
54 lines
1.8 KiB
Python
"""Example of dependency injection in Python."""
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import logging
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import sqlite3
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import boto.s3.connection
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import example.main
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import example.services
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import dependency_injector.containers as containers
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import dependency_injector.providers as providers
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class Platform(containers.DeclarativeContainer):
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"""IoC container of platform service providers."""
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configuration = providers.Configuration('config')
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logger = providers.Singleton(logging.Logger, name='example')
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database = providers.Singleton(sqlite3.connect, configuration.database.dsn)
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s3 = providers.Singleton(boto.s3.connection.S3Connection,
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configuration.aws.access_key_id,
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configuration.aws.secret_access_key)
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class Services(containers.DeclarativeContainer):
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"""IoC container of business service providers."""
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users = providers.Factory(example.services.UsersService,
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logger=Platform.logger,
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db=Platform.database)
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auth = providers.Factory(example.services.AuthService,
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logger=Platform.logger,
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db=Platform.database,
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token_ttl=Platform.configuration.auth.token_ttl)
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photos = providers.Factory(example.services.PhotosService,
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logger=Platform.logger,
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db=Platform.database,
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s3=Platform.s3)
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class Application(containers.DeclarativeContainer):
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"""IoC container of application component providers."""
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main = providers.Callable(example.main.main,
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users_service=Services.users,
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auth_service=Services.auth,
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photos_service=Services.photos)
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