Re: RoutesDispatches causing Controller Class init to execute twice

I ended up moving my setup_routes function into the app class as a method. 
 Here I now refer "self" instead of a new instance of "Echo_v1".  This 
works and my app does not end up having double the open connections to the 
database any more.

On Thursday, November 3, 2016 at 11:36:55 PM UTC+2, Johan Hartzenberg wrote:
>
> I have always wondered about the need to specify the controller in the 
> dispatches connect and in the tree.mount call.
>
> It is a bit of a pain since I initiate a pool of DB connections in my app 
> class.
>
> So in the main program I have
>
> import cherrypy
> from routehandlers import Echo_v1, setup_routes
>
>
>
> if __name__ == '__main__':
>     general_conf = {'/': {'tools.gzip.on': True,
>                  'tools.trailing_slash.on': False,
>                  'log.screen': False}}
>     api_routes_conf = {}
>     api_routes_conf.update(dict(general_conf))
>     api_routes_conf['/'].update({'request.dispatch': setup_routes()})
>
>     cherrypy.tree.mount(Echo_v1(), "/v1/", api_routes_conf)
>     cherrypy.engine.start()
>     cherrypy.engine.block()
>
> And in the class def I have
>
>
>
>
> import cherrypy
>
> *# [...snip...]*
>
> class Echo_v1(object):
>
>     def __init__(self):
>         dbname, dbuser, dbpass, dbhost = get_db_parameters()
>         poolsize = cherrypy.config.get("db_conn_poolsize")
>         self.dbpool = ConnectionPool(dbname, dbuser, dbpass, dbhost, poolsize)
>         print("Created pool with %d Open DB connections" % self.dbpool.get_poolsize())
>
>
> # [ ... snip ...]
>
> def setup_routes():
>     testCntrl = Echo_v1()
>     d = cherrypy.dispatch.RoutesDispatcher()
>     d.connect(name='echoback_route', route='/echoback',
>               controller=testCntrl,
>               action='echoaction')
>     d.connect(name='index_route', route='/x',
>               controller=testCntrl,
>               action='index')
>
>
>
> It works.... but the debug message appears twice and I see double the 
> expected nr of open connections on the database.
>
> So clearly the class __init__ runs twice, once in setup_routes and once in 
> the main program when mounting the app.
>
> I'm thinking I could create a class instance in the main and pass that to 
> setup_routes and to the tree.mount call
>
> But maybe setup_routes aught to be a special method in the app class.  And 
> maybe I can have it update the app config all in one go?
>
> Suggestions please!
>

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