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server-backend/base_external_system/readme/USAGE.rst
2019-06-20 18:20:31 +02:00

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The credentials for systems are stored in the ``external.system`` model, and are to
be configured by the user. This model is the unified interface for the underlying
adapters.
Using the Interface
~~~~~~~~~~~~~~~~~~~
Given an ``external.system`` singleton called ``external_system``, you would do the
following to get the underlying system client:
.. code-block:: python
with external_system.client() as client:
client.do_something()
The client will be destroyed once the context has completed. Destruction takes place
in the adapter's ``external_destroy_client`` method.
The only unified aspect of this interface is the client connection itself. Other more
opinionated interface/adapter mechanisms can be implemented in other modules, such as
the file system interface in `OCA/server-tools/external_file_location
<https://github.com/OCA/server-tools/tree/9.0/external_file_location>`_.
Creating an Adapter
~~~~~~~~~~~~~~~~~~~
Modules looking to add an external system adapter should inherit the
``external.system.adapter`` model and override the following methods:
* ``external_get_client``: Returns a usable client for the system
* ``external_destroy_client``: Destroy the connection, if applicable. Does not need
to be defined if the connection destroys itself.