Re: [xmlblaster-devel] XPath subscriptions

[Marcel Ruff <mr at marcelruff.info>]

inEvo wrote:
> Hi,
>
> Is there a way to dispose of topics stored in the dabase?!

A call to erase() does it.
erase has some QoS to control if pending messages of this topic
in callback queues are still delivered or are disposed as well.

> Also is there a way to  use a single xmlBlaster for multiple sessions, 
> that is to say... Let's imagine i have a topic called 'test"
>
> A user would login to a given session of the xmlBlaster server, and all 
> those in the same session, if they had subscribed to the 'test' topic 
> would receive the message. Still, another user could login to the 
> xmlBlaster, in a diferrent session, and subscribe to the same 'test' 
> topic, but all messages published by users in the first session would 
> not be received by him.

If somebody subscribes to 'test' he will get all messages published to it,
a topic is not bound to a session or a session group.
But you can use filtering with client tags to
do what you want.

regards
Marcel



> Does something like this exist or do i have to use some client tags for 
> this?
>
> Regards,
>
> Nelson
>
> Marcel Ruff wrote:
>
> > Hi,
> >
> > this runs fine here:
> >
> >   java org.xmlBlaster.Main
> >
> >   java javaclients.HelloWorldSubscribe -xpath 
> > "/xmlBlaster/key/SimpleChat[ at canal='hello']"
> >
> >   java javaclients.HelloWorldPublish -oid SimpleChat -clientTags 
> > "<SimpleChat canal='hello'/>" -numPublish 10
> >
> >
> > Note that the very first publish sets the immutable
> > meta information of the topic (you SimpleChat tag).
> >
> > Further publishes won't change this meta information.
> >
> > It could be possible that your topic existed already wihtout
> > the 'canal' attribute from some former tests you made.
> > Have a look into the xmlBlaster dump in the <XmlKeyDom> section.
> >
> > Please try to delete your persistence store
> > (remove all in $HOME/tmp/* or ${user.home}${file.separator}tmp
> > if you use HSQLDB) and restart xmlBlaster.
> >
> > regards,
> > Marcel
> >
> >
> >
> > inEvo wrote:
> >
> > > Hi,
> > >
> > > I'm currently having a few problems with XPath subscription...
> > >
> > > If i subscribe with a key like :
> > >
> > > <key queryType='XPATH'>
> > >  /xmlBlaster/key/SimpleChat
> > > </key>
> > >
> > > then .. if i publish :
> > >
> > > <key oid='SimpleChat'>
> > >    <SimpleChat canal='hello'>
> > > </SimpleChat>
> > >  </key>
> > >   <content><![CDATA[test]]></content>
> > >  <qos>
> > >   <isPublish/>
> > >  </qos>
> > >
> > > everything works.. but if i had subscribed with a key like: 
> > > /xmlBlaster/key/SimpleChat[ at canal='hello']
> > > i would have not received the message!! Am i missing something here?!
> > >
> > > I can subscribe to topics using /xmlBlaster/key[ at oid='SimpleChat'] so 
> > > what's the problem here?!
> > >
> > > Any help will be greatly appreciated.
> > >
> > > Regards,
> > >
> > >    Nelson Silva


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