Re: [xmlblaster] XmlBlaster with Java WebStart

[Michele <laghi at swissinfo.org>]

Hi Nelson,

inEvo wrote:
> Hi Michele,
>
> First of all thank you for your reply :)
>
> Just some more questions .. since this is a WebStart application can the 
> client receive/send messages from/to sources other than the server were 
> it resides?  And what about if the client is using a firewall? Wich 
> protocols can be tunneled through it?

You can send and receive messages to/from everywhere.

If you have a firewall but you can get out to via a port, you can use 
SOCKET in its default configuration. That way callbacks will be tunneled 
back using the same connection.

If you are in a network behind a firewall and the only way out is 
through a proxy, then I believe the only option in the current 
implementation would be to use the applet which would use the proxing of 
the browser.

We have lookted at the possibility of modifying the http protocol to be 
able to handle connections via a proxy but until now nothing has been 
done in that direction yet.

Cheers
Michele


> regards
> Nelson
>
> Michele wrote:
>
> > Hi Nelson,
> >
> > I think this is straightforward.
> >
> > Write your own code needed for your client and package it into a jar 
> > file (in the following example 'furtherJar.jar'). Then put the 
> > xmlBlaster.jar distribution jar (or the one you compile yourself) and 
> > the furtherJar.jar file in the document directory of your web server.
> >
> > On the same put a file like the following 'application.jnlp':
> >
> >
> > <?xml version="1.0" encoding="utf-8"?>
> > <!-- JNLP File for ePIB -->
> > <jnlp spec="1.0+"
> >   codebase="http://youraddress.com"; href="application.jnlp">
> >   <information>
> >                 <title>My Own XmlBlaster Application</title>
> >     <vendor>My Company</vendor>
> >     <homepage href="index.html"/>
> >     <description>Some Description here</description>
> >     <description kind="short">APPL</description>
> >     <icon href="BeautifulImage.gif"/>
> >     <offline-allowed/>
> >   </information>
> >   <security>
> >       <all-permissions/>
> >   </security>
> >   <resources>
> >                 <j2se version="1.4+" initial-heap-size="64M" 
> > max-heap-size="512M"/>
> >                 <jar href="xmlBlaster.jar"/>
> >                 <jar href="furtherJar.jar"/>
> >   </resources>
> >   <application-desc main-class="MyMainClass"/>
> > </jnlp>
> >
> >
> > If you are using apache as a webserver put into
> >
> > httpd.conf:
> >
> > AddType application/x-java-jnlp-file .JNLP
> >
> >
> > for further details about webstart:
> >
> > http://www.logemann.org/articles/javawebstart.php
> >
> > regards
> > Michele
> >
> >
> >
> > inEvo wrote:
> >
> > > Hi,
> > >
> > > I was thinking of developing a distributed application using JMS, but 
> > > the lack of support for native clients in languages other than JAVA 
> > > put me off.
> > > So i turned to XmlBlaster...
> > >
> > > I'de just like to know if anyone has developed a XmlBlaster client 
> > > using JavaWebStart? Better yet ... a server? If so could you give me 
> > > some pointers or example code?
> > >
> > > Thank you in advance for any help regarding this subject.
> > >
> > > Best regards,
> > >
> > > Nelson