I remember reading somewhere on StackOverflow that few connections maybe supported to one channel to support same user refreshing the page or smt like that.. How many connections did you test to one channel? If you want fan out, please star this issue: http://code.google.com/p/googleappengine/issues/detail?id=4506
вторник, 9 октября 2012 г., 17:05:54 UTC+3 пользователь Richard Watson написал: > > Seems pretty well defined here: > https://developers.google.com/appengine/docs/java/channel/overview#Caveats > > "One Client Per Client ID > > Only one client at a time can connect to a channel using a given Client > ID, so an application cannot use a Client ID for fan-out. In other words, > it's not possible to create a central Client ID for connections to multiple > clients (For example, you can't create a Client ID for something like a > "global-high-scores" channel and use it to broadcast to multiple game > clients.)" > On Tuesday, October 9, 2012 3:41:21 PM UTC+2, gops wrote: >> >> its undefined behavior. they never said it will not work or prohibited. >> they said undefined. >> >> On Tue, Oct 9, 2012 at 1:54 AM, Richard Watson <[email protected]>wrote: >> >>> I'm sure it's very unlikely to work reliably. If you need that, until >>> Google makes a policy change I'd suggest using something like Pusher. >>> http://pusher.com/ >>> >>> >>> On Monday, October 8, 2012 7:17:10 PM UTC+2, Andrew Mackenzie wrote: >>>> >>>> This overview page for the Channel API >>>> >>>> https://developers.google.com/**appengine/docs/java/channel/**overview<https://developers.google.com/appengine/docs/java/channel/overview> >>>> >>>> states in the "Caveats" section: >>>> >>>> "Only one client at a time can connect to a channel using a given >>>> Client ID, so an application cannot use a Client ID for fan-out. In other >>>> words, it's not possible to create a central Client ID for connections to >>>> multiple clients (For example, you can't create a Client ID for something >>>> like a "global-high-scores" channel and use it to broadcast to multiple >>>> game clients.)" >>>> >>>> I can confirm that you CAN have multiple clients listen on the same >>>> channel (via the same Channel ID) and that it works, a single message sent >>>> on the channel is received by all listening clients. >>>> >>>> Can anyone from google comment? >>>> - is the documentation out of date and the design and implementation do >>>> support this >>>> - am I "just lucky" and this could break any time....and I should be >>>> planning a redesign >>>> >>>> It seems a very useful design feature of channels when pushing out >>>> status updates to multiplayer games, group chats and many other use cases. >>>> >>>> I have tried having one page (GWT app) listen on more than one channel, >>>> and as stated in the Caveats, it seems to NOT work. >>>> As David Bowie would say: "If I say I can't do it, I can't do it, I >>>> don't make false claims" :-) >>>> >>>> Thanks. >>>> >>>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Google App Engine" group. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msg/google-appengine/-/BF7hA1CZZiIJ. >>> >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/google-appengine?hl=en. >>> >> >> -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/6QtqiZ9F9sYJ. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
