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Re: [Springframework-developer] Example classes needed
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From: Lars F. <lar...@gm...> - 2003-08-24 16:15:02
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Thomas,
thanks for the suggestion. Tried it but it doesn't work.
This is a serious one:
Tested my app with Tomcat 4.1.24 and it works.
I does NOT work with
WebLogic 8.1 SP1, WebLogic Express SP1, WebLogic 7.0 SP3.
What makes me wonder is that Petclinic works with WebLogic 8.1 SP1.
Regards
Lars
> Lars,
>
> I have looked into this a little bit more. What happens is that
> ServletContextListener.contextInitialized() method is called _after_ the
> HttpServlet.init() method is called on servlets specified with <load-on-
> startup>. This causes the xxx-servlet.xml to be loaded before the
> applicationContext.xml is loaded, so that is why you can't reference
> the 'cwxDao' bean. This behavior is the opposite of what I see for
> Tomcat,
> and I'm sure the same is true for Orion and Resin that Juergen is using.
> I
> looked in the Servlet 2.3 specification, but I did not see anything
> specifying
> which order these methods should be called in. Maybe Juergen or Rod can
> shed
> some more light on this issue.
>
> You should be able to use the ContextLoaderServlet for now.
>
> Thomas
>
>
> > Lars,
> >
> > This might be a WebLogic specific issue - I just saw similar error when
> I
> > deployed my app in WebLogic 8.1.
> >
> > I will try to research this in more detail later on today or tomorrow.
> In
> > the
> > meantime try this in your web.xml
> >
> > <servlet>
> > <servlet-name>cwxRootContext</servlet-name>
> >
> <servlet-class>com.interface21.web.context.ContextLoaderServlet</servlet-
> class>
> > <load-on-startup>1</load-on-startup>
> > </servlet>
> >
> > <servlet>
> > <servlet-name>cwx</servlet-name>
> >
>
<servlet-class>com.interface21.web.servlet.DispatcherServlet</servlet-class>
> > <load-on-startup>2</load-on-startup>
> > </servlet>
> >
> > Thomas
> >
> >
> >
> > > Thomas,
> > >
> > > attached is the web.xml.
> > >
> > > Without the ContextLoaderListener nothing would happen, not even
> > > the Hibernate stuff in applicationContext.xml.
> > >
> > > Thanks
> > > Lars
> > >
> > > > Lars,
> > > >
> > > > You did not include your web.xml, but my guess is you need to add a
> > > > ContextLoaderListener. The application context has to be loaded
> first,
> > > > and the
> > > > error messages indicates that the bean 'cwxDao' can't be found, so
> it
> > > > looks like
> > > > that did not happen.
> > > >
> > > > web.xml:
> > > >
> > > > <web-app>
> > > >
> > > > <!--
> > > > - Loads the root application context of this web app at startup,
> > > > - by default from "/WEB-INF/applicationContext.xml".
> > > > -->
> > > > <listener>
> > > > <listener-class>
> > > > com.interface21.web.context.ContextLoaderListener
> > > > </listener-class>
> > > > </listener>
> > > >
> > > > <!-- more definitions -->
> > > >
> > > > </web-app>
> > > >
> > > >
> > > > Hope this helps.
> > > >
> > > > Thomas
> > > >
> > > >
> > > >
> > > > > Hi all Spring experts,
> > > > >
> > > > > can anyone provide me the example classes mentioned in several
> > skeletons
> > > >
> > > > > (e.g. exampleController, exampleBusinessObject,
> > exampleDataAccessObject)
> > > > ?
> > > > >
> > > > > The two provided sample applications don't reflect the skeletons
> very
> > > > well.
> > > > > There should be one 'big' application showing all the stuff and
> many
> > > > small
> > > > > ones to show single options (like in WebWork 1).
> > > > >
> > > > > I've defined the following in applicationContext.xml (and it
> works):
> > > > >
> > > > > <bean id="cwxDao" class="example.dao.CwxDaoHibernate">
> > > > > <property name="sessionFactory"><ref
> > > > bean="cwxSessionFactory"/></property>
> > > > > </bean>
> > > > >
> > > > > When defining
> > > > >
> > > > > (cwx-servlet.xml)
> > > > >
> > > > > <!-- Controller for the initial "Hello" page -->
> > > > > <bean id="cwxController" class="example.web.CwxController">
> > > > > <property name="cwxDao"><ref external="cwxDao"/></property>
> > > > > </bean>
> > > > >
> > > > > (CwxController)
> > > > >
> > > > > private CwxDao cwxDao;
> > > > >
> > > > > public void setCwxDao(CwxDao cwxDao) {
> > > > > this.cwxDao = cwxDao;
> > > > > }
> > > > >
> > > > >
> > > > > I always get
> > > > >
> > > > > ERROR [com.interface21.web.servlet.DispatcherServlet] - <Servlet
> with
> > > > name
> > > > > 'cwx' : initialization error>
> > > > > com.interface21.beans.factory.NoSuchBeanDefinitionException: No
> bean
> > > > named
> > > > > [cwxDao] is defined {class
> > > > com.interface21.beans.factory.xml.XmlBeanFactory:
> > > > > defined beans
> [messageSource,viewResolver,urlMapping,cwxController]}
> > > > >
> > > > > This is the second time I get almost useless error messages. This
> is
> > one
> > > > > point where EJBs are far ahead (
> > > > > there is almost always an error message telling you what excactly
> is
> > > > > wrong).
> > > > >
> > > > > Another (dumb) question:
> > > > >
> > > > > What is the difference between a DAO *implementation* and a
> business
> > > > object
> > > > > and where does
> > > > > e. g. Petclinic reflect this ? I'm asking this because of the
> > diiference
> > > > > between the skeletons and the
> > > > > sample applications. The skeletons provide a DAO and a Business
> Object
> > > > using
> > > > > the DAO definition,
> > > > > Petclinic does not. The samples should be as close as possible to
> the
> > > > > skeletons or the skeletons should
> > > > > at least provide the java classes (shouldn't be too hard).
> > > > >
> > > > > Thanks in advance
> > > > > Lars
> > > > >
> > > > >
> > > > >
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