Re: [xmlblaster] Fail Safe for Applets - How?

[Marcel Ruff <mr at marcelruff.info>]

chris lau wrote:

> Hi Marcel,
>
> I spent alot of time thinking about this fail safe stuff. I'm not an experienced java programmer
> by any means so how would I go about writing a wrapper class that will do the reconnect? I mean,
> what are the steps involved in doing this?
>
> What I was trying to do previously is when the exception is thrown (because the connection went
> down), I called a method which would go and try to do a connect. Then I would check isConnected to
> see if true and if not wait a while and try again.
>  
Yes, this could be the way in the wrapper.

Note however - you detect a failure not until your applet want to access 
the server:
If you need to detect missing callback notifications earlier
you need to ping the server to find out there is a problem.

regards,
Marcel

> Am I on the right track here?
>
> --- Marcel Ruff <mr at marcelruff.info> wrote:
>
>  
>
> > chris lau wrote:
> >
> >    
> >
> > > I used the code from the applet examples as a reference to adding code in my applet to connect
> > >      
> > to
> >    
> >
> > > xmlblaster. However, there was a case where the blaster server went down (I closed it
> > > accidentally) and the applet threw an exception. When I started up the server again and
> > >      
> > published
> >    
> >
> > > a message (PtP), the applet didn't get any notifications. The only way I got it to receive
> > > messages again was to refresh the webpage which reloaded the applet - which logged in again. In
> > >      
> > a
> >    
> >
> > > real life situation, the user wouldn't even know that the connection went down and would be
> > > wondering why there are no notifications coming in.
> > >
> > > I looked at some of the fail safe examples in the site and I noticed that none of the classes
> > > needed are in the xmlBlasterAppletLib.jar. Does this mean I can't use them?
> > >
> > > If not, is there a way to get some sort of simple fail safe mechanism working?
> > >
> > >
> > >      
> > The primitive applet code has no fail safe features.
> > You could wrap a class around it which does reconnect for you.
> > This would be a nice feature to add to our distribution ...
> >
> > regards,
> > Marcel
> >
> >    
> >
> > > Thanks.
> > >
> > > __________________________________________________
> > > Do You Yahoo!?
> > > Tired of spam?  Yahoo! Mail has the best spam protection around 
> > > http://mail.yahoo.com 
> > >
> > >
> > >
> > >      
> >    
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around 
> http://mail.yahoo.com 
>
>