[jboss-as7-dev] problem with the classloader, not able to load a JDBC driver

[Jason Greene]

Right that's correct.

Sent from my iPhone

On Aug 1, 2012, at 2:19 AM, Flemming Harms <flemming.harms at gmail.com> wrote:

> Jason,
> 
> Just so I'm sure I follow you, what you suggestion is solution like this, right?
> 
> Properties cg = new Properties();
> cg.put("user", user);
> cg.put("password", password);
> Connection conn = driverClass.connect(url, cg);
> 
> 2012/7/31 Jason T. Greene <jason.greene at redhat.com>
> I can't remember if I replied to this one or not, but a better solution is to use the Driver class directly. We should avoid sticking random things in the global registry which might even end up containing conflicting values.
> 
> 
> On 7/24/12 7:53 AM, Flemming Harms wrote:
> Thanks!
> 
> I had to do one more thing to make it work with the module class loader,
> since the database driver was loaded in it's own class loader and it was
> not known to the current class loader I had to find a way to make it
> available
> 
> I solve it by wrapping the driver in my own class and register the
> driver to the DriverManager
> 
> Like this :
>   DriverManager.registerDriver(new DatabaseDriverWrapper(driver));
>   DriverManager.getConnection(url, user, password);
> 
> 2012/7/23 Tomaž Cerar <tomaz.cerar at gmail.com <mailto:tomaz.cerar at gmail.com>>
> 
> 
> 
> 
>     On Mon, Jul 23, 2012 at 5:58 PM, Jason T. Greene
>     <jason.greene at redhat.com <mailto:jason.greene at redhat.com>> wrote:
> 
>         On 7/23/12 10:51 AM, Jesper Pedersen wrote:
>          > On 07/23/2012 11:42 AM, Flemming Harms wrote:
>          >> I found a solution to my problem. Had to update the xsd
>         schema with an
>          >> extra attribute "module" and then user need pack his JDBC
>         driver as module.
>          >>
>          >> I use the code below to load the model and the driver class.
>          >>
>          >> Class<?> driverClass =
>          >>
>         Module.loadClassFromCallerModuleLoader(ModuleIdentifier.fromString(moduleName),
>          >> driver);
>          >> driverClass.newInstance();
>          >>
>          >> <outbound-connections>
>          >>           <database>
>          >>               <connection module="com.h2database.h2"
>          >> driver="org.h2.jdbcx.JdbcDataSource" name="db"
>          >> url="jdbc:h2:/tmp/test;DB_CLOSE_DELAY=-1" username="sa"
>         password=""
>          >> min-pool-size="10" max-pool-size="20" />
>          >>           </database>
>          >> </outbound-connections>
>          >>
>          >> Does it make sense?
>          >
>          > The -ds.xml functionality uses the module through the
>         <driver> tag, so
>          > this would be similar.
>          >
>          > Things to watch out for is of course the password attribute -
>         it should
>          > at least support the vault mechanism I would say.
> 
>         If you make the attribute definition have expressions=true, it will
>         automatically enable vault support.
> 
>     given that you use AD.parseAndSetParameter() when parsing and
>     setting field and  AD.resolveModelAttribute() when getting data from
>     model
> 
>         --
>         Jason T. Greene
>         JBoss AS Lead / EAP Platform Architect
>         JBoss, a division of Red Hat
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> 
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> 
> -- 
> Jason T. Greene
> JBoss AS Lead / EAP Platform Architect
> JBoss, a division of Red Hat
> 
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