Spring - 404 when using declarative list

Question

I am trying to create a list in Spring via declaration in application-context.xml

      <beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">

<context:component-scan base-package="com.example.check" />

<bean id="valueOptions">
    <property name="valueList">
    <list>
        <value>Value A</value>
        <value>Value B</value>
    </list>
    </property>

</bean>

When I try to run this code , I am getting

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.get(Unknown Source) atorg.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:186)

and I am getting a 404 when trying to run the application. Any ideas as to what I am doing wrong?

Update

SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.NullPointerException at java.util.concurrent.ConcurrentHashMap.get(Unknown Source) at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:186) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:857) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:829) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:440) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409) at java.security.AccessController.doPrivileged(Native Method) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:264) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:220) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:261) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:429) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:729) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:381) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:255) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:199) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:45) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4791) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source) at java.util.concurrent.FutureTask.run(Unknown Source) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

The reason I am saying it is related to the list creation is because if I remove the list and the corresponding usage in my xhtml file, the application works fine.

can you please share the full error message? It might not be related to the list declaration at all. — melihcelik
Is the XML that you shared the real XML that you are using? If not, can you share the original one after anonymizing the names/values? — melihcelik
yes this is the same XML I am using - have just replaced the values — Raghav
The reason why I thought there was something missing in the XML was that, I did not see the "class" attribute on the bean definition but @Jean already replied. So it's OK now. — melihcelik

Jean-Philippe Bond Jean-Philippe Bond · Accepted Answer · 2013-01-17T22:17:07

You didn't provide the class attribute for the bean element in your xml file...

<bean id="valueOptions" class="your.package.ObjectName">
    <property name="valueList">
    <list>
        <value>Value A</value>
        <value>Value B</value>
    </list>
    </property>
</bean>

If your bean is an implementation of the List object, you can do something like this :

<bean id="valueOptions" class="java.util.ArrayList">
    <constructor-arg>
        <list>
            <value>Value A</value>
            <value>Value B</value>                
        </list>
    </constructor-arg>
</bean>

Or use the util namespace :

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                    http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.5.xsd">


<util:list id="valueOptions" value-type="java.lang.String">
    <value>Value A</value>
    <value>Value B</value>   
</util:list>

Spring - 404 when using declarative list

1 Answers