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Update example of pool usage with aiohttp #878

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merged 2 commits into from
Oct 9, 2023
Merged

Update example of pool usage with aiohttp #878

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eadc86b
Use cleanup_ctx in pool usage doc
ir4y Jan 17, 2022
bc522ce
Merge branch 'master' into master
elprans Mar 25, 2022
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18 changes: 12 additions & 6 deletions docs/usage.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -399,20 +399,26 @@ Web service that computes the requested power of two.
text="2 ^ {} is {}".format(power, result))


async def init_app():
async def init_db(app):
"""Initialize a connection pool."""
app['pool'] = await asyncpg.create_pool(database='postgres',
user='postgres')
yield
app['pool'].close()


def init_app():
"""Initialize the application server."""
app = web.Application()
# Create a database connection pool
app['pool'] = await asyncpg.create_pool(database='postgres',
user='postgres')
# Create a database context
app.cleanup_ctx.append(init_db)
# Configure service routes
app.router.add_route('GET', '/{power:\d+}', handle)
app.router.add_route('GET', '/', handle)
return app


loop = asyncio.get_event_loop()
app = loop.run_until_complete(init_app())
app = init_app()
web.run_app(app)

See :ref:`asyncpg-api-pool` API documentation for more information.