get ref bean from applicationContext.xml

[ramesh kancherla]

Hi,
This is Ramesh. I am implementing Spring Application.I have register userDAO bean in applicationContext.xml and i am using this userDAO bean ref in Dispatcher-servlet.xml . But I am getting Exception.

applicationContext.xml

  
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
 
<beans>
 
<bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName"><value>com.mysql.jdbc.Driver</value></property>
<property name="url"><value>jdbc:mysql://localhost/rameshdb</value></property>
<property name="username"><value>root</value></property>
<property name="password"><value>ramesh</value></property>

</bean>
<bean id="mySessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource"><ref bean="myDataSource"/></property>
<property name="mappingResources">
<list>
<value>/com/user.hbm.xml</value>

</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQLDialect
</value>
</property>
</bean>

<bean id="userdao" class="com.UserDAO">
<property name="sessionFactory"><ref bean="mySessionFactory"/></property>
     </bean>

</beans>
 

and Dispatcher-servlet.xml is

    
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">
 

<beans>
 

 
<!-- ========================= DEFINITIONS OF PUBLIC CONTROLLERS ========================= -->
 
    <bean id="userFormValidator" class="com.UserFormValidator"/>
       
   <bean id="userController" class="com.UserController">
      <property name="sessionForm"><value>true</value></property>        
      <property name="commandName"><value>userBean</value></property> 
      <property name="commandClass"><value>com.UserBean</value></property>   
      <property name="validator"><ref bean="userFormValidator"/></property>
       <property name="formView"><value>userForm</value></property>
      <property name="successView"><value>success</value></property>
      <property name="userdao"><ref bean="userdao"/></property>
      
   </bean>
    
<bean id="urlMapping" class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
      <property name="urlMap">
         <map>
            <entry key="/test/userPage.do"><ref bean="userController"/></entry>
           
         </map>
              
      </property>
   </bean>
   
   
        <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass"><value>org.springframework.web.servlet.view.JstlView</value></property>
        <property name="prefix"><value>/WEB-INF/</value></property>
        <property name="suffix"><value>.jsp</value></property>
    </bean>
 
</beans>
 

I am getting Exception Trace as

   
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userController' defined in ServletContext resource [/WEB-INF/test-servlet.xml]: Can't resolve reference to bean 'userdao' while setting property 'userdao'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'userdao' is defined: org.springframework.beans.factory.support.DefaultListableBeanFactory defining beans [userFormValidator,userController,regController,urlMapping,viewResolver]; root of BeanFactory hierarchy
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'userdao' is defined: org.springframework.beans.factory.support.DefaultListableBeanFactory defining beans [userFormValidator,userController,regController,urlMapping,viewResolver]; root of BeanFactory hierarchy
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:351)
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedBeanDefinition(AbstractBeanFactory.java:637)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveReference(AbstractAutowireCapableBeanFactory.java:1021)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveValueIfNecessary(AbstractAutowireCapableBeanFactory.java:944)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:885)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:714)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:331)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:257)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:277)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:319)
at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:131)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:305)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:250)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:219)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:111)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4364)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:924)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:887)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Sep 19, 2008 12:29:43 PM org.apache.catalina.core.StandardContext loadOnStartup
SEVERE: Servlet /LoginReg threw load() exception
org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'userdao' is defined: org.springframework.beans.factory.support.DefaultListableBeanFactory defining beans [userFormValidator,userController,regController,urlMapping,viewResolver]; root of BeanFactory hierarchy
at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:351)
at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedBeanDefinition(AbstractBeanFactory.java:637)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveReference(AbstractAutowireCapableBeanFactory.java:1021)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.resolveValueIfNecessary(AbstractAutowireCapableBeanFactory.java:944)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:885)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:714)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:331)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:257)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:147)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:277)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:319)
at org.springframework.web.context.support.AbstractRefreshableWebApplicationContext.refresh(AbstractRefreshableWebApplicationContext.java:131)
at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:305)
at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:250)
at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:219)
at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:111)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1161)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:981)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4364)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:924)
at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:887)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:492)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
at org.apache.catalina.core.StandardService.start(StandardService.java:516)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Sep 19, 2008 12:29:43 PM org.apache.catalina.core.ApplicationContext log
INFO: Loading Spring root WebApplicationContext
Sep 19, 2008 12:29:45 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8080
Sep 19, 2008 12:29:45 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Sep 19, 2008 12:29:45 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/15  config=null
Sep 19, 2008 12:29:45 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 3681 ms
 

 

can any one please give me suggestion how can I get userDAO ref from applicationContext.xml to dispatcher-servlet.xml

Thanks & Regards
Ramesh K

[Anadi Misra]

Hi,

Check the web.xml configuration for ContextLoaderListener or the ContextLoaderServlet what ever you are using, it moght be the applicationContext is not available to the container.

[ramesh kancherla]

HI,

ApplicationContext.xml is available to the ContextLoaderServlet but still i am getting the same error

can you please tell me what is the problem

Thanks & Regards
Ramesh K

[Mark Spritzler]

What is in the "Tomcat" logs? Do you see the applicationContext being created?

Mark

[Vasan Varadarajan]

I have the same issue, and tried a 'workaround':
Make your controller implement ApplicationContextAware. This causes the method:
public void setApplicationContext(ApplicationContext applicationContext)

to be called with the ApplicationContext object.
You can then use this to access the bean defined in applicationcontext.xml:

Example (method in controller):
public void setApplicationContext(ApplicationContext applicationContext) {
AppBean = (<Name of class> applicationContext.getBean("<id of bean in applicationContext.xml");
}

I admit that this is not a great workaround, since you probably want the bean to be injected into the constructor the controller. I think that the proper solution is with the 'ref' attribute in the controller bean specification. Somehow this ref attribute should be able to reference a bean in the applicationContext. If you find the answer let me know.

[Vasan Varadarajan]

The previous workaround is not necessary. I was able to reference the application context bean in my -servlet.xml file the normal way:
ref bean="<bean id in applicationContext.xml>".
Apologies for the hasty post..