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Update docs for order of listeners #1805 (#1834)

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Prasanna Walimbe 2020-04-26 05:33:23 +05:30 committed by GitHub
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docs/sanic/middleware.rst
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@ -132,6 +132,17 @@ For example:
async def close_db(app, loop): async def close_db(app, loop):
await app.db.close() await app.db.close()
Note:
The listeners are deconstructed in the reverse order of being constructed.
For example:
If the first listener in before_server_start handler setups a database connection,
ones registered after it can rely on that connection being alive both when they are started
and stopped, because stopping is done in reverse order, and the database connection is
torn down last.
It's also possible to register a listener using the `register_listener` method. It's also possible to register a listener using the `register_listener` method.
This may be useful if you define your listeners in another module besides This may be useful if you define your listeners in another module besides
the one you instantiate your app in. the one you instantiate your app in.