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 <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]> > > > > 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? > > >
