Hi, I'm trying to have a servlet call a method on a stateless ejb which then
calls a method on a stateful ejb. First off, is this allowed?
If I change the second ejb in the sequence to a stateless ejb, the code works
fine, looking at the stack, the problem seems to occur when the 1st ejb
(shipfacadebean) attempts to look up and inject an instance of the stateful ejb
(objectfacadebean).
If I change both ejbs to be stateful, i get the same error.
The Error:
java.lang.StackOverflowError
| at java.security.AccessController.doPrivileged(Native Method)
| at
com.sun.naming.internal.VersionHelper12.getContextClassLoader(VersionHelper12.java:158)
| at
com.sun.naming.internal.VersionHelper12.loadClass(VersionHelper12.java:41)
| at
javax.naming.spi.NamingManager.getObjectFactoryFromReference(NamingManager.java:129)
| at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:302)
| at
org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1110)
| at
org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1127)
| at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:690)
| at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
| at
org.jboss.ejb3.JndiProxyFactory.getObjectInstance(JndiProxyFactory.java:51)
| at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
| at
org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1110)
| at
org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1127)
| at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:690)
| at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
| at javax.naming.InitialContext.lookup(InitialContext.java:351)
| at
org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:1046)
| at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:685)
| at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:572)
| at
org.jboss.ejb3.injection.JndiFieldInjector.inject(JndiFieldInjector.java:69)
| at
org.jboss.ejb3.interceptor.InterceptorInjector.inject(InterceptorInjector.java:92)
| at
org.jboss.ejb3.BaseContext.initialiseInterceptorInstances(BaseContext.java:112)
| at
org.jboss.ejb3.stateful.ProxiedStatefulBeanContext.initialiseInterceptorInstances(ProxiedStatefulBeanContext.java:242)
| at org.jboss.ejb3.AbstractPool.create(AbstractPool.java:92)
| at org.jboss.ejb3.ThreadlocalPool.get(ThreadlocalPool.java:48)
| at
org.jboss.ejb3.cache.simple.SimpleStatefulCache.create(SimpleStatefulCache.java:206)
| at
org.jboss.ejb3.stateful.StatefulContainer.createSession(StatefulContainer.java:220)
| at
org.jboss.ejb3.stateful.StatefulLocalProxyFactory.createProxy(StatefulLocalProxyFactory.java:100)
| at
org.jboss.ejb3.JndiProxyFactory.getObjectInstance(JndiProxyFactory.java:52)
| at
javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)
| at
org.jnp.interfaces.NamingContext.getObjectInstance(NamingContext.java:1110)
| at
org.jnp.interfaces.NamingContext.getObjectInstanceWrapFailure(NamingContext.java:1127)
|
| .....repeated
|
|
My code is laid out thus:
The Servlet:
| ShipFacade sf = (ShipFacade) ic.lookup(System.getProperty(APP_NAME +
APP_NAME_FACADE));
|
| if(ufilters == null)
| {
| ufilters = sf.getFilters();
| }
|
The stateless ejb:
| @Stateless
| @SecurityDomain("SMSLDAP")
| public class ShipFacadeBean implements ShipFacade , UserFilteredService {
|
| @EJB private ObjectFacade of;
| ....
|
| public TreeMap<String, DynaBean> getFilters() throws DelegateException {
| log.info("Getting Filters");
| TreeMap<String, DynaBean> ts = of.getAllKeyedValues();
| if(ts.size() == 0)
| {
| log.info("DataBase Keys Empty, reinitialising");
| initialiseShipDB();
| return of.getAllKeyedValues();
| }
| return ts;
| }
|
| ....
|
|
| }
|
The stateful ejb:
| @Stateful
| @SecurityDomain("SMSLDAP")
| public class ObjectFacadeBean implements ObjectFacade {
|
| @PersistenceContext (unitName="objentity")
| private EntityManager manager;
|
| @Resource
| private SessionContext sc;
|
| public TreeMap<String, DynaBean> getAllKeyedValues()
| {
| log.info("Getting static key list");
| List<PersistentKey> lpk =
manager.createNamedQuery("persistentkey.getAllLimited").getResultList();
| TreeMap<String, DynaBean> allKeys = new TreeMap<String,
DynaBean>(new Comparator(){
| public int compare(Object o, Object o1) {
| return 1;
| }
| });
|
| for(PersistentKey pk: lpk)
| {
| allKeys.put(pk.getName(), getKeyedValues(pk));
| }
| return allKeys;
| }
|
| }
|
|
|
Your help appreciated.
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