[MYFACES-4299] ManagedProperty & Websocket: NullPointerException

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.3.4
• Fix Version/s: 2.3-next-M1, 2.3.5
• Component/s: JSR-372
• Environment: Tomcat
• Assignee: Thomas Andraschko
• Reporter: Volodymyr Siedlecki
• Created: 25/Jul/19 17:51
• Updated: 09/Oct/19 13:43
• Resolved: 26/Jul/19 08:16

Description

Hello,

 

I have a sample JSF 2.3.3 application  that uses @ManagedProperty with a web socket observer class. This application throws a null pointer exception.  

In the createManagedProperty of the ManagedPropertyProducer class,  FacesContext.getCurrentInstance() returns null.

In the createManagedProperty method, if you catch the error and create a new facesContext via BeanProvider.getContextualReference, the example still won’t work. Is there any way around this error?

Or can anyone confirm that this example is not a valid use of ManagedProperty?  It doesn’t seem like it since the communication is going through web sockets and therefore isn’t hitting the Faces Servlet. 

 

Also, this application doesn't work with the mojarra 2.3 code either.

 

I’ve provided the sample application. 

Here is the stack trace:

java.lang.NullPointerException
    at org.apache.myfaces.cdi.managedproperty.ManagedPropertyProducer.createManagedProperty(ManagedPropertyProducer.java:83)
    at org.apache.myfaces.cdi.managedproperty.ManagedPropertyProducer.lambda$new$0(ManagedPropertyProducer.java:77)
    at org.apache.myfaces.cdi.util.AbstractDynamicProducer.create(AbstractDynamicProducer.java:97)
    at org.apache.webbeans.component.third.ThirdpartyBeanImpl.create(ThirdpartyBeanImpl.java:97)
    at org.apache.webbeans.context.DependentContext.getInstance(DependentContext.java:68)
    at org.apache.webbeans.context.AbstractContext.get(AbstractContext.java:125)
    at org.apache.webbeans.container.BeanManagerImpl.getReference(BeanManagerImpl.java:813)
    at org.apache.webbeans.container.BeanManagerImpl.getInjectableReference(BeanManagerImpl.java:673)

 

Thank you