def sub(self, uri, prefix=''):
"""
subscribe the web client to this socket
"""
ident = self.ident(uri, prefix)
idents = self.recievers.iterkeys()
self.log('subscribe:', 'requested', ident)
# we don't need to actually create more filtered sockets if we
# already have a general one on the books.
# the javascript end will handle choosing the most specific
# subscriber callback for any message we send over the wire
if ident in self.recievers or self.any_has_prefix(ident, idents):
# already subscribed
self.write_message({'success': 'already subscribed'})
self.log('subscribe:', 'already has', ident)
return
# create a new reciever and a callback for it
self.log('subscribe:', 'subscribing to prefix', repr(prefix), 'at uri', uri)
rcvr = AsyncReciever(sub(uri), prefix)
self.recievers[ident] = rcvr
rcvr.on_recieve(self.write_squidwork)
self.write_message({'success': 'subscribed {}'.format(ident)})
def sub(self, uri, prefix=''):
"""
subscribe the web client to this socket
"""
ident = self.ident(uri, prefix)
idents = self.recievers.iterkeys()
self.log('subscribe:', 'requested', ident)
# we don't need to actually create more filtered sockets if we
# already have a general one on the books.
# the javascript end will handle choosing the most specific
# subscriber callback for any message we send over the wire
if ident in self.recievers or self.any_has_prefix(ident, idents):
# already subscribed
self.write_message({'success': 'already subscribed'})
self.log('subscribe:', 'already has', ident)
return
# create a new reciever and a callback for it
self.log('subscribe:', 'subscribing to prefix', repr(prefix), 'at uri',
uri)
rcvr = AsyncReciever(sub(uri), prefix)
self.recievers[ident] = rcvr
rcvr.on_recieve(self.write_squidwork)
self.write_message({'success': 'subscribed {}'.format(ident)})
def main():
"""
run the app!
currently very hairy. starts with dummy data
"""
conf = Config('squidwork.web.monitor')
conf.option('cache-size', type=int, help='numer of elements to store')
conf.option('display-size', type=int, help='numer of elements to store')
conf.retrieve()
settings = dict(debug=conf.debug,
template_path=os.path.dirname(os.path.realpath(__file__)))
port = conf.port
# the message buffer stores the last N mesages
cache = MessageCache(conf.cache_size)
# subscribe to all services!
uris = Service.all_uris()
recvr = AsyncReciever(sub(*uris))
recvr.on_recieve(cache.add)
# generate some dummy data to pre-populate the cache with
dummy = [dummy_message() for i in range(0, 20)]
cache.add(*dummy)
# we include the api_handlers from squidwork.web so we can use the
# squidwork web<--WebSocket-->ZeroMq bridge
all_handlers = api_handlers(conf.raw_config, debug=conf.debug) + [
# the index page is totally static -- all it does is request javascript
(r"/", TemplateRenderer, dict(source='templates/index.html')),
# JSON view of whatever is currently in our cache. this is how the
# app gets its initial data on page load
(r"/data.json", JSONHandler, dict(encoder=MessageEncoder, data=(
lambda: {'latest': cache.cache, 'types': cache.by_origin}))),
# big coffeescript app written with Mithril.js. All HTML structure on
# the page is produced by view functions in app.coffee
(r"/app.js", CoffeescriptHandler,
dict(source='templates/app.coffee', count=conf.display_size)),
# static, plain-jane scss
(r"/style.css", ScssHandler, dict(source='templates/style.scss')),
]
# spin up the app!
app = tornado.web.Application(all_handlers, **settings)
try:
app.listen(port)
tornado.ioloop.IOLoop.instance().start()
except KeyboardInterrupt:
print ' keyboard interrupt: exiting.'