losing message on short network failure

[Ram C]

Hi Simone,

I noticed cometd connection broken message in the browser console log while in debug mode. (breakpoint set in chrome). Since the /meta/connect message is not received in given time the server marked the connection broken and cleanup the session.  

When the client re-established the long poll, is there a way to send the undelivered messages from server?

thanks,

Ram

[Simone Bordet]

Hi,

On Tue, Aug 27, 2019 at 9:20 PM Ram C <time...@gmail.com> wrote:
>
> Hi Simone,
>
> I noticed cometd connection broken message in the browser console log while in debug mode. (breakpoint set in chrome). Since the /meta/connect message is not received in given time the server marked the connection broken and cleanup the session.

That is a *long* network failure, not a short one.

> When the client re-established the long poll, is there a way to send the undelivered messages from server?

CometD by default does not store in a persistent way the messages
destined to a client, because the client may never show up again and
the messages will be stored indefinitely, etc.
However, if you need such feature, which is highly application logic
dependent (and that is the reason why CometD does not implement it -
whatever solution won't work for all cases), you can implement it
yourself by using CometD listeners: for example, whenever a message is
added to the queue for a remote client, you store it into a persistent
storage.

--
Simone Bordet
----
http://cometd.org
http://webtide.com
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from the Jetty & CometD experts.

[Ram C]

Hi Simone,

thanks for the reply. Could you please point me the listeners doc?

On Wednesday, August 28, 2019 at 10:34:31 AM UTC-4, Simone Bordet wrote:

Hi,

[Cosimo]

On Wed, Aug 28, 2019, at 19:39, Ram C wrote:

Hi Simone,

thanks for the reply. Could you please point me the listeners doc?

I believe this is what you are looking for,

https://docs.cometd.org/current/apidocs/org/cometd/bayeux/server/ServerSession.QueueListener.html

/C

[Ram C]

with this Queue Listener callback I can store the messages into persistent storage but is there a callback to know the client connection is broken?

thank you.

[Cosimo]

On Wed, Aug 28, 2019, at 19:52, Ram C wrote:

with this Queue Listener callback I can store the messages into persistent storage but is there a callback to know the client connection is broken?

There are a bunch of Listener classes you may want to explore.

https://docs.cometd.org/current/apidocs/org/cometd/bayeux/server/ServerSession.RemoveListener.html

-- 

Cosimo

[Ram C]

ok. Thank you.