Mambo, you might also take a look at Steve's other thread on ZK and
thread-safety issues.
http://osdir.com/ml/java.cayenne.user/2007-05/msg00067.html
On 8/24/08, Steve Wells <websystem..mail.com> wrote:
> The way I seem (seem as I am yet to *fully* test this) to have solved that
> is to use Spring to create the ObjectContext and then you inject that in to
> whatever else you want. This will not be Thread bound but Singleton, I
> guess in Spring you could write (or copy) a Thread bound scope if required.
> eg:
> <bean id="myObjectContext" class="org.apache.cayenne.access.DataContext"
> factory-method="createDataContext" scope="singleton">
> <constructor-arg value="MyDomain"/>
> </bean>
> <!-- A data layer controller/convenience function layer -->
> <bean id="dataServices" class="com.mypackage.dataservices.DataServices">
> <property name="objectContext">
> <ref local="myObjectContext"/>
> </property>
> </bean>
> public class DataServices {
> private ObjectContext objectContext;
>
> public ObjectContext getObjectContext() {
> return objectContext;
> }
>
> public void setObjectContext(ObjectContext objectContext) {
> this.objectContext = objectContext;
> }
>
>
> HTH
> Steve
> 2008/8/23 mambo <ikonicpattern..mail.com>
>
>
> > I've been looking through the mailing list and I can't find a definite
> > answer. I'm using ZK, I have added:
> > <filter>
> > <filter-name>CayenneFilter</filter-name>
> >
> > <filter-class>org.apache.cayenne.conf.WebApplicationContextFilter</filter-class>
> > </filter>
> > <filter-mapping>
> > <filter-name>CayenneFilter</filter-name>
> > <url-pattern>/*</url-pattern>
> > </filter-mapping>
> >
> > to my web.xml. When I try "DataContext context =
> > DataContext.getThreadDataContext();" I get an exception that says "Current
> > thread has no bound DataContext". I'm figuring this is because ZK is multi
> > threaded. I'm pretty new to Java so I'm not really comfortable trying to
> > hack the cayanne source to get things to run. Is there a solution for this?
> > If i created a new Datacontext with each Database request, how badly would
> > that affect performance of my web app?
> >
>
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