Hendy Irawan created WICKET-5135:
------------------------------------
Summary: 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
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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