Yes, you can - just write some wrapper with re-implementation of run_app.
Here is a simple example. All app-specific parts of run_app are moved to the dedicated class AppWrapper. The MultiApp is responsible only for initialize all configured apps, keep running the loop and clean up.
import asyncio
from aiohttp import web
class AppWrapper:
def __init__(self, aioapp, port, loop):
self.port = port
self.aioapp = aioapp
self.loop = loop
self.uris = []
self.servers = []
def initialize(self):
self.loop.run_until_complete(self.aioapp.startup())
handler = self.aioapp.make_handler(loop=self.loop)
server_creations, self.uris = web._make_server_creators(
handler, loop=self.loop, ssl_context=None,
host=None, port=self.port, path=None, sock=None,
backlog=128)
self.servers = self.loop.run_until_complete(
asyncio.gather(*server_creations, loop=self.loop)
)
def shutdown(self):
server_closures = []
for srv in self.servers:
srv.close()
server_closures.append(srv.wait_closed())
self.loop.run_until_complete(
asyncio.gather(*server_closures, loop=self.loop))
self.loop.run_until_complete(self.aioapp.shutdown())
def cleanup(self):
self.loop.run_until_complete(self.aioapp.cleanup())
def show_info(self):
print("======== Running on {} ========\n".format(', '.join(self.uris)))
class MultiApp:
def __init__(self, loop=None):
self._apps = []
self.user_supplied_loop = loop is not None
if loop is None:
self.loop = asyncio.get_event_loop()
else:
self.loop = loop
def configure_app(self, app, port):
app._set_loop(self.loop)
self._apps.append(
AppWrapper(app, port, self.loop)
)
def run_all(self):
try:
for app in self._apps:
app.initialize()
try:
for app in self._apps:
app.show_info()
print("(Press CTRL+C to quit)")
self.loop.run_forever()
except KeyboardInterrupt: # pragma: no cover
pass
finally:
for app in self._apps:
app.shutdown()
finally:
for app in self._apps:
app.cleanup()
if not self.user_supplied_loop:
self.loop.close()
Note: be aware of the use of internal aiohttp's method, that may be subject of change.
Now let's use it:
from aiohttp import web
async def handle1(request):
return web.Response(text='SERVER 1')
async def handle2(request):
return web.Response(text='SERVER 2')
app1 = web.Application()
app1.router.add_get('/', handle1)
app2 = web.Application()
app2.router.add_get('/', handle2)
ma = MultiApp()
ma.configure_app(app1, port=8081)
ma.configure_app(app2, port=8071)
ma.run_all()
As a side note, think again why you need this. In almost all cases the decoupling is the better choice. Setting many endpoints in the same process make them depend on each other. There's one case that comes to my mind and has "good" reasoning, the internal stats / debug endpoint.
