I'm currently implementing an Axis2 webservice with (already existing) Hibernate 3.05 layer for data storage.

a)putting a Listener into Axis2/WEB-INF/web.xml

<!-- Listener is fired when the application is ready to start -->
<listener>
<listener-class>org.mistral.benchmarking.webapp.StartupContextListener</listener-class>
</listener>

b)putting the hibenate .jar's into Axis/WEB_INF/lib/

c)putting the Listener class into Axis/WEB-INF/classes/org/..../webapp/
It basically starts up Hibernate at Axis2 context initialisation (when tomcat starts the Axis2.war)
public final class StartupContextListener implements ServletContextListener {

public Logger logger;

public void contextInitialized(ServletContextEvent event)
{
ServletContext context = event.getServletContext();
String realPath = context.getRealPath("/");
String configFile = "WEB-INF/classes/bm-system.properties";
String logfile = realPath + "/logs/" + "benchmarking.html";

logger = HtmlLoggerFactory.createHtmlLogger(StartupContextListener.class, logfile);

//get properties
try{
BenchmarkingSystemProperties.getInstance().load(new FileInputStream(realPath + configFile));
logger.info("loaded benchmarking system properties from " + realPath + configFile);
} catch(Exception e){
logger.info("could not load benchmarking system properties from " + realPath + configFile);
}
if(context.getServletContextName() == "Apache-Axis2")
logfile = "benchmarking_service.html";
//Torque.init(realPath + configFile);

//init benchmarking system
try{
logger.info(context.getServletContextName() + " context is initialized. startup Benchmarking...");
//***init HibernateUtil Singleton***
Benchmarking.init();
logger.info(context.getServletContextName() + " context is initialized. Benchmarking ready.");
} catch (Exception e) {
logger.error(e.getMessage());
}
}

public void contextDestroyed(ServletContextEvent event)
{
ServletContext context = event.getServletContext();
logger.info(context.getServletContextName() + " context is destroyed.");
}
}

d)using the HibernateUtil Singleton in the Axis2 webservice class
e)now i've the problem that the already created b) Singleton is null again, when calling HibernateUtil.getInstance() from the Axis2 webservice method (different classloader,...?)

Has anyone done this? Would be nice to know for both Hibernate and Axis2 communities, i think.
I'll post the solution, when i know it.

Martin Ebner

It is not specific to Axis2 but:

this servlet gets loaded before anything else via load on startup




the context is Spring context and all the service POJOs are wrapped in transaction interceptors to implement hibernateSession-per-businessTransaction strategy

Axis binding class simply delegates calls to the wrapped POJOs

[code]
public class PurchaseOrderService implements PurchaseOrderIntf {


public String submitPurchaseOrder( PurchaseOrder poObject ) throws POException, RemoteException{

public POStatus getPurchaseOrderStatus( String id ) throws RemoteException{
return OPCApplicationCxt.getPurchaseOrderServiceLogic().getPurchaseOrderStatus( id );
}

public PurchaseOrder getPurchaseOrder( String id ) throws POException, RemoteException{
return OPCApplicationCxt.getPurchaseOrderServiceLogic().getPurchaseOrder( id );
}

}

[/code
]

Oh, and do not forget to set 'lazy=false' in mappings for the strategy.

thanks for your advise regarding hibernate use, and startup servlet, kgignatyev.
i've written an ant script, that packages my hibernate persistance into the Axis2 webapp and deploys it.

http://www.sbox.tugraz.at/home/m/martine/axis2-hibernate/build.xml

Now it works fine.
ServletContextListener works as well.

Martin