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https://issues.apache.org/jira/browse/WICKET-5135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Emond Papegaaij resolved WICKET-5135.
-------------------------------------
Resolution: Fixed
Fix Version/s: 6.10.0
7.0.0
I've added several checks in the initialization code.
> wicket-atmosphere EventBus constructor throws NullPointerException under
> invalid state
> --------------------------------------------------------------------------------------
>
> Key: WICKET-5135
> URL: https://issues.apache.org/jira/browse/WICKET-5135
> Project: Wicket
> Issue Type: Bug
> Components: wicket-atmosphere
> Affects Versions: 6.6.0
> Reporter: Hendy Irawan
> Assignee: Emond Papegaaij
> Fix For: 7.0.0, 6.10.0
>
>
> With invalid configuration, like the WebApplication not yet associated with
> the servlet, wicket-atmosphere throws NPE.
> {code}
> Caused by: org.springframework.beans.factory.BeanCreationException: Error
> creating bean with name 'atmosphereEventBus' defined in class
> id.co.bippo.springapp.AppConfig: Instantiation of bean failed; nested
> exception is org.springframework.beans.factory.BeanDefinitionStoreException:
> Factory method [public org.apache.wicket.atmosphere.EventBus
> id.co.bippo.springapp.AppConfig.atmosphereEventBus()] threw exception; nested
> exception is java.lang.NullPointerException
> at
> org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:581)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1031)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:927)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:490)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:314)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:910)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:853)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:768)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> ... 107 common frames omitted
> Caused by: org.springframework.beans.factory.BeanDefinitionStoreException:
> Factory method [public org.apache.wicket.atmosphere.EventBus
> id.co.bippo.springapp.AppConfig.atmosphereEventBus()] threw exception; nested
> exception is java.lang.NullPointerException
> at
> org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:181)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:570)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> ... 117 common frames omitted
> Caused by: java.lang.NullPointerException: null
> at org.apache.wicket.atmosphere.EventBus.<init>(EventBus.java:113)
> ~[wicket-atmosphere-0.8.jar:0.8]
> at
> id.co.bippo.springapp.SoluvasWebApplication.getEventBus(SoluvasWebApplication.java:296)
> ~[SoluvasWebApplication.class:na]
> at
> id.co.bippo.springapp.AppConfig.atmosphereEventBus(AppConfig.java:270)
> ~[AppConfig.class:na]
> at
> id.co.bippo.springapp.AppConfig$$EnhancerByCGLIB$$a9c1dc07.CGLIB$atmosphereEventBus$1(<generated>)
> ~[spring-core-3.2.2.RELEASE.jar:na]
> at
> id.co.bippo.springapp.AppConfig$$EnhancerByCGLIB$$a9c1dc07$$FastClassByCGLIB$$40a0fc3e.invoke(<generated>)
> ~[spring-core-3.2.2.RELEASE.jar:na]
> at
> org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
> ~[spring-core-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:286)
> ~[spring-context-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> at
> id.co.bippo.springapp.AppConfig$$EnhancerByCGLIB$$a9c1dc07.atmosphereEventBus(<generated>)
> ~[spring-core-3.2.2.RELEASE.jar:na]
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> ~[na:1.7.0_15]
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> ~[na:1.7.0_15]
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> ~[na:1.7.0_15]
> at java.lang.reflect.Method.invoke(Method.java:601) ~[na:1.7.0_15]
> at
> org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:160)
> ~[spring-beans-3.2.2.RELEASE.jar:3.2.2.RELEASE]
> ... 118 common frames omitted
> {code}
> It should wrap the NPE in a more descriptive error. Suggestion: "Provided
> Wicket WebApplication is not associated with a ServletContext. Please ensure
> Wicket application is fully initialized before creating Atmosphere EventBus."
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