Re: [xmlblaster-devel] XPath subscriptions

[inEvo <inevo at netcabo.pt>]

Ok,

I did as you said and i was able to receive the messages but now the 
problem is i receive to many!

>s test1

Subscribing topic test1
Subscribed key :
<key queryType='XPATH'>
 /xmlBlaster/key/SimpleChat[ at canal='test1']
</key>

Here i subscribed to a xpath key

Then i publish a message with that same key:

>test1 hello

Publishing :
 <key oid='SimpleChat'>
   <SimpleChat canal='test1'/>
 </key>
  <content><![CDATA[ hello]]></content>
 <qos>
  <isPublish/>
 </qos>

Got the message as expected:

Message from SoEu
<SimpleChat canal='test1'></SimpleChat> hello

The problem is when i publish a message with a different canal 
attribute, like this:

>test2 hello

Publishing :
 <key oid='SimpleChat'>
   <SimpleChat canal='test2'/>
 </key>
  <content><![CDATA[ hello]]></content>
 <qos>
  <isPublish/>
 </qos>

I receive the message even without having subscribe to messages with 
canal set to 'test2'!

Message from SoEu
<SimpleChat canal='test2'></SimpleChat> hello

I'm a doing something wrong here?!

Regards,

   Nelson Silva


Marcel Ruff wrote:

> 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