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75 lines
2.0 KiB
ReStructuredText
75 lines
2.0 KiB
ReStructuredText
Bundles mini application example
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.. currentmodule:: dependency_injector.containers
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"Bundles" is an example mini application that is intended to demonstrate the
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power of dependency injection for creation of re-usable application components
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("bundles") with 100% transparency of their dependencies.
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Example application
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~~~~~~~~~~~~~~~~~~~
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"Bundles" mini application has next structure:
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.. code-block:: bash
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bundles/
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bundles/ <-- Bundles package
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photos/ <-- Photos bundle
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__init__.py <-- Photos bundle dependency injection container
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entities.py
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repositories.py
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users/ <-- Users bundle
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__init__.py <-- Users bundle dependency injection container
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entities.py
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repositories.py
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run.py <-- Entrypoint
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IoC containers
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~~~~~~~~~~~~~~
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Next two listings show :py:class:`DeclarativeContainer`'s for "users" and
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"photos" bundles.
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Listing of ``bundles/users/__init__.py``:
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.. literalinclude:: ../../examples/miniapps/bundles/bundles/users/__init__.py
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:language: python
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.. note::
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- ``Users`` container has dependency on database.
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Listing of ``bundles/photos/__init__.py``:
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.. literalinclude:: ../../examples/miniapps/bundles/bundles/photos/__init__.py
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:language: python
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.. note::
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- ``Photos`` container has dependencies on database and file storage.
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Run application
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~~~~~~~~~~~~~~~
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Finally, both "bundles" are initialized by providing needed dependencies.
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Initialization of dependencies happens right in the runtime, not earlier.
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Generally, it means, that any part of any bundle could be overridden on the
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fly.
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Listing of ``run.py``:
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.. literalinclude:: ../../examples/miniapps/bundles/run.py
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:language: python
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Links
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~~~~~
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+ `Dependency Injector <https://github.com/ets-labs/python-dependency-injector/>`_
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+ `Full example sources <https://github.com/ets-labs/python-dependency-injector/tree/master/examples/miniapps/bundles>`_
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.. disqus::
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