Previous jBPM PageFlow and #{identity.login} No Longer worki

[djeverson]

Just upgraded to the 1.17 RC1 release.

Prior to the update, we had the following page defined in a pageflow file:

 <page name="login" view-id="/login.xhtml">
 <redirect/>
 <transition name="cancel" to="info" />
 <transition name="login" to="isLoggedIn">
 <action expression="#{identity.login}"/>
 </transition>
 <transition name="cancel" to="cancelpage" />
 </page>

This worked just fine.
However, after the Seam upgrade, we now get the following error after providing the userid and password and clicking on the button that triggers the login transition in the above page flow:

2007-02-26 16:47:59,393 ERROR [org.jbpm.graph.def.GraphElement] action threw exception: couldn't evaluate expression '#{identity.login}'
org.jbpm.JbpmException: couldn't evaluate expression '#{identity.login}'
 at org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator.evaluate(JbpmExpressionEvaluator.java:38)
 at org.jbpm.graph.def.Action.execute(Action.java:119)
 at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:235)
 at org.jbpm.graph.def.GraphElement.executeActions(GraphElement.java:212)
 at org.jbpm.graph.def.GraphElement.fireAndPropagateEvent(GraphElement.java:182)
 at org.jbpm.graph.def.GraphElement.fireEvent(GraphElement.java:166)
 at org.jbpm.graph.def.Transition.take(Transition.java:106)
 at org.jbpm.graph.def.Node.leave(Node.java:383)
 at org.jbpm.graph.exe.Token.signal(Token.java:178)
 at org.jbpm.graph.exe.Token.signal(Token.java:141)
 at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:229)
 at org.jboss.seam.pageflow.PageflowHelper.signal(PageflowHelper.java:47)
 at org.jboss.seam.core.Pageflow.navigate(Pageflow.java:298)
 at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:59)
 at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:84)
 at javax.faces.component.UICommand.broadcast(UICommand.java:106)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:274)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:250)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:405)
 at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343)
 at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
Caused by: org.jbpm.jpdl.el.ELException: Unable to find a value for "login" in object of class "org.jboss.seam.security.RuleBasedIdentity" using operator "."
 at org.jbpm.jpdl.el.impl.Logger.logError(Logger.java:482)
 at org.jbpm.jpdl.el.impl.Logger.logError(Logger.java:499)
 at org.jbpm.jpdl.el.impl.Logger.logError(Logger.java:612)
 at org.jbpm.jpdl.el.impl.ArraySuffix.evaluate(ArraySuffix.java:303)
 at org.jbpm.jpdl.el.impl.ComplexValue.evaluate(ComplexValue.java:146)
 at org.jbpm.jpdl.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:264)
 at org.jbpm.jpdl.el.impl.ExpressionEvaluatorImpl.evaluate(ExpressionEvaluatorImpl.java:191)
 at org.jbpm.jpdl.el.impl.JbpmExpressionEvaluator.evaluate(JbpmExpressionEvaluator.java:34)
 at org.jbpm.graph.def.Action.execute(Action.java:119)
 at org.jbpm.graph.def.GraphElement.executeAction(GraphElement.java:235)
 at org.jbpm.graph.def.GraphElement.executeActions(GraphElement.java:212)
 at org.jbpm.graph.def.GraphElement.fireAndPropagateEvent(GraphElement.java:182)
 at org.jbpm.graph.def.GraphElement.fireEvent(GraphElement.java:166)
 at org.jbpm.graph.def.Transition.take(Transition.java:106)
 at org.jbpm.graph.def.Node.leave(Node.java:383)
 at org.jbpm.graph.exe.Token.signal(Token.java:178)
 at org.jbpm.graph.exe.Token.signal(Token.java:141)
 at org.jbpm.graph.exe.ProcessInstance.signal(ProcessInstance.java:229)
 at org.jboss.seam.pageflow.PageflowHelper.signal(PageflowHelper.java:47)
 at org.jboss.seam.core.Pageflow.navigate(Pageflow.java:298)
 at org.jboss.seam.jsf.SeamNavigationHandler.handleNavigation(SeamNavigationHandler.java:59)
 at org.apache.myfaces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:84)
 at javax.faces.component.UICommand.broadcast(UICommand.java:106)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.processEvents(AjaxViewRoot.java:274)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.broadcastEvents(AjaxViewRoot.java:250)
 at org.ajax4jsf.framework.ajax.AjaxViewRoot.processApplication(AjaxViewRoot.java:405)
 at org.apache.myfaces.lifecycle.LifecycleImpl.invokeApplication(LifecycleImpl.java:343)
 at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:86)
 at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
 at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
2007-02-26 16:47:59,393 ERROR [org.jboss.seam.web.ExceptionFilter] uncaught exception
javax.servlet.ServletException
...

I looked at 1.1.7 related posts and could not find anything similar.
Any idea what the problem or solution is?

Thanks!

[gavin.king]

Hum, looks like a bug in jBPM's EL.

What happens if you add the following class to your project:

@Name("org.jboss.seam.core.identity")
public class MyIdentity extends RuleBasedIdentity
{
 public String login() { return super.login(); }
}

[djeverson]

I added this to one of my backing beans:

 public void login() {
 Identity.instance().login();
 }

I called this method instead (#{mybean.login}) rather than #{identity.login} and everything appears to work again.

[gavin.king]

Of course, but I would really like to confirm that this is a jBPM bug so we can fix it, so would you please try out my solution? thanks

[johnechesher]

Gavin,
I hit the same problem, so I tried your suggestion.
Had to tweak it a little, but adding the resulting class (below) overcomes the problem:

@Name("org.jboss.seam.security.identity")
@Scope(ScopeType.SESSION)
@Intercept(InterceptionType.AFTER_RESTORE_VIEW)
public class MyIdentity extends RuleBasedIdentity
{
 public String login() {
 return super.login();
 }
}