Re: Re: Re: Re: DAO not getting injected, using springbean

Bruce McGuire Tue, 16 Jun 2009 15:24:28 -0700

Hi Vasu.

Thanks for the info. Now I get it, and have successfully wired my demoapp so that it does the job.

Although I did notice that along with the context:component-scan I didneed to define the beans that I was going to autowire. How did you getaround this?


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

<bean id="userDAO"class="com.coastware.vProbe.model.dao.hibernate.UserDAOHibernate" />


Other than that, this is a very much reduced context file.

Now I need to duplicate this in my real application.

Thanks for everyone's help.

Bruce McGuire.

Vasu Srinivasan wrote:

Using annotations, I have only one line in the spring's
applicationContext.xml --

<context:component-scan base-package="packagename" />

Services are tagged with @Service, Daos are tagged with
@Component("xxxDaoImpl"), Wicket web pages have @SpringBean
(name="<serviceName>")

Within the ServiceImpl, the Daos are tagged with @Autowired.

No other xml config, setter, getter for daos etc.

Works like a charm.

2009/6/16 James Carman <[email protected]>

You are correct.  You should only use @SpringBean in your wicket-related
code (components/pages).  Let Spring wire the rest together, however you
want to configure it to do that (with annotations or xml).  You can use
@Autowired to inject your DAOs into your Services.  You just have to make
sure you set up your Spring context so that it takes care of that.

On Tue, Jun 16, 2009 at 4:36 PM, Bruce McGuire <[email protected]>
wrote:

Hello James.

So I have completely missed the point of the Repository, Service and
SpringBean annotations?  I was under the impression that the idea was to
avoid using a lot of xml in my context files.

If I am understanding correctly, what you and Martijn are saying is the
following:
Tag the dao and service classes with Repository and Service, and in

wicket

code, tag any use of them with SpringBean. However, in the service

classes,

use the normal xml injection method and get/set to get the dao into the
service class.

Is this a correct interpretation?

Thanks,

Bruce.

James Carman wrote:

You shouldn't use @SpringBean in your spring-managed beans, only in
your Wicket code.  You don't want view-specific code in your "domain"
code.

On Tue, Jun 16, 2009 at 4:17 PM, Bruce McGuire <[email protected]>
wrote:

Hi Martijn.

Thanks for the quick response.

Are you saying that the dao and the service should have the
InjectorHolder code, rather than the @Repository and @Service tags?

Bruce.

Martijn Dashorst wrote:

@SpringBean only works with Components. For all other uses you should
either call InjectorHolder.getInjector().inject(this) in your
constructor or use Salve.

Martijn

On Tue, Jun 16, 2009 at 9:26 PM, Bruce McGuire<[email protected]>
wrote:

Hello.

I have created a new small project to try to figure out how to use

the

SpringBean, Service, and Repository annotations with Wicket, Spring,
Hibernate, Maven and Eclipse.

However, I am getting an error with a user DAO that I have created.

I have a service that is using the dao tagged as @Service, I have the
DAO in
the service tagged with @SpringBean, and the DAO code itself is

tagged

with
@Repository.  The service that is using the DAO is getting found
correctly.

When I have the InjectorHolder code in the dao constructor, I get an
error
that says 'InjectorHolder has not been assigned an injector'

When I comment out the InjectorHolder line in the dao constructor,

the

DAO
is null, and getUserDAO throws an exception.

Since I am not certain that I can attach files, I will insert the
relevant
code and exceptions into this email.

Any pointers you can give would be greatly appreciated.

Thanks very very much,

Bruce.

UserServiceImpl
====================> @Service("UserService")
public class UserServiceImpl implements UserService
{
 @SpringBean
 UserDAO userDAO ;

 private UserDAO getUserDAO()
 {
    if (null =erDAO)
    {
        throw new RuntimeException("userDAO is null") ;
    }

    return(userDAO) ;
 }

 @Override
 public List<User> getUsers()
 {
    return (getUserDAO().findAll());
 }
====================>
UserDAOHibernate
====================> @Repository("UserDAO")
public class UserDAOHibernate extends GenericDAOHibernate<User,

String>

implements UserDAO
{
 private static Log log =Factory.getLog("UserDAOHibernate");

 public UserDAOHibernate()
 {
    InjectorHolder.getInjector().inject(this);
 }

...
====================>
HomePage
====================> public class HomePage extends WebPage
{
 @SpringBean
 private UserService userService ;

 public HomePage(final PageParameters parameters)
 {
    super (parameters) ;

    List<User> userList =rService.getUsers() ;

    RepeatingView rv = RepeatingView("Users") ;
    for(User user: userList)
    {
        Label userName = Label("username", user.getUsername()) ;
        rv.add(userName) ;
    }

    this.add(rv) ;
 }
}
====================>
CoastwareApplication
====================> public class CoastwareApplication extends
WebApplication
{
 private ApplicationContext ctx;

 @SpringBean
 private UserService userService ;

 protected static Log log =Factory.getLog(CoastwareApplication.class)

 private static ISpringContextLocator CTX_LOCATOR =
ISpringContextLocator()
 {
    public ApplicationContext getSpringContext()
    {
        return(CoastwareApplication.get().ctx) ;
    }
 } ;

 public CoastwareApplication()
 {
 }

 public void init()
 {
    ctx = ClassPathXmlApplicationContext("appContext.xml") ;

    addComponentInstantiationListener(new
SpringComponentInjector(this));

    super.init() ;
 }

 @Override
 public Session newSession(Request request, Response response)
 {
    return (new WebSession(request)) ;
 }

 public static CoastwareApplication get()
 {
    return ((CoastwareApplication) Application.get()) ;
 }

 private <T> T createProxy(Class<T> clazz)
 {
    return ((T) LazyInitProxyFactory.createProxy(clazz, new
SpringBeanLocator(clazz, CTX_LOCATOR))) ;
 }

 public Class<HomePage> getHomePage()
 {
    return HomePage.class;
 }

 public UserService getUserService()
 {
    if (null =erService)
    {
        userService =ateProxy(UserService.class) ;

    }
    return userService;
 }
}
====================>

Web.xml
====================>   <display-name>vProbe</display-name>

 <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:appContext.xml</param-value>
 </context-param>

 <context-param>
    <param-name>configuration</param-name>
    <param-value>development</param-value>
 </context-param>

 <listener>
    <listener-class>
        org.springframework.web.context.ContextLoaderListener
    </listener-class>
 </listener>

 <filter>
    <filter-name>wicketFilter</filter-name>

 <filter-class>org.apache.wicket.protocol.http.WicketFilter</filter-class>

    <init-param>
        <param-name>applicationClassName</param-name>

<param-value>com.coastware.vProbe.CoastwareApplication</param-value>
     </init-param>
 </filter>

 <filter>
    <filter-name>opensessioninview</filter-name>

<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>

 </filter>

 <filter-mapping>
    <filter-name>wicketFilter</filter-name>
    <url-pattern>/*</url-pattern>
 </filter-mapping>

 <filter-mapping>
    <filter-name>opensessioninview</filter-name>
    <url-pattern>/*</url-pattern>
 </filter-mapping>
====================>
appContext.xml
====================> <?xml version="1.0" encoding="UTF-8"?>
<beans
 default-autowire=odetect"
 xmlns=p://www.springframework.org/schema/beans"
 xmlns:xsi=p://www.w3.org/2001/XMLSchema-instance"
 xmlns:aop=p://www.springframework.org/schema/aop"
 xmlns:tx=p://www.springframework.org/schema/tx"
 xmlns:context=p://www.springframework.org/schema/context"
 xsi:schemaLocation>>>
http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
    http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-2.5.xsd

">

 <bean id=aSource"
class=.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name=" value="jdbc:mysql://192.168.15.128/vprobe"/>
    <property name=verClassName" value="com.mysql.jdbc.Driver"/>
    <property name=rname" value="vProbe"/>
    <property name=sword" value="vProbe"/>
 </bean>

 <bean id=sionFactory"

class=.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">

    <property name=aSource" ref="dataSource"/>

    <property nameŹkagesToScan">
        <list>
            <value>com.coastware.vProbe.model</value>
        </list>
    </property>

    <property name=ernateProperties">
        <props>
            <prop
key=ernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
            <prop key=ernate.show_sql">true</prop>
            <prop key=ernate.format_sql">true</prop>
            <prop key=ernate.use_sql_comments">true</prop>
        </props>
    </property>
 </bean>

 <context:component-scan base-package=.coastware" />

 <bean id=nSessionInViewInterceptor"

class=.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor">

    <property name=sionFactory">
        <ref bean=sionFactory"/>
    </property>
 </bean>

 <bean id=nsactionManager"
class=.springframework.orm.hibernate3.HibernateTransactionManager">
    <property name=sionFactory">
        <ref bean=sionFactory"/>
    </property>
 </bean>

 <bean id=ernateTemplate"
class=.springframework.orm.hibernate3.HibernateTemplate">
    <property name=sionFactory">
        <ref bean=sionFactory"/>
    </property>
 </bean>

 <tx:annotation-driven transaction-manager=nsactionManager"/>

 <bean

class=.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>

 <bean

class=.springframework.transaction.interceptor.TransactionAttributeSourceAdvisor">

    <property name=nsactionInterceptor" ref="txInterceptor"/>
 </bean>

 <bean id=nterceptor"

class=.springframework.transaction.interceptor.TransactionInterceptor">

    <property name=nsactionManager" ref="transactionManager"/>
    <property name=nsactionAttributeSource">
        <bean

class=.springframework.transaction.annotation.AnnotationTransactionAttributeSource"/>

    </property>
 </bean>
</beans>
====================>

Error with InjectorHolder line
====================> SEVERE: Exception sending context initialized
event to listener instance of
class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error

creating

bean
with name 'UserDAO' defined in file [C:\Program Files\Apache Software
Foundation\Tomcat

6.0\webapps\vProbe\WEB-INF\classes\com\coastware\vProbe\model\dao\hibernate\UserDAOHibernate.class]:

Instantiation of bean failed; nested exception is
org.springframework.beans.BeanInstantiationException: Could not
instantiate
bean class

[com.coastware.vProbe.model.dao.hibernate.UserDAOHibernate]:

Constructor threw exception; nested exception is
java.lang.IllegalStateException: InjectorHolder has not been assigned
an
injector. Use InjectorHolder.setInjector() to assign an injector. In
most
cases this should be done once inside SpringWebApplication subclass's
init()
method.
 at

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:883)

at

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:839)

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:222)

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:728)

at

org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:380)

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:3843)

at

org.apache.catalina.core.StandardContext.start(StandardContext.java:4342)

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.deployWAR(HostConfig.java:830)
 at

org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:719)

at

org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:490)

at

org.apache.catalina.startup.HostConfig.start(HostConfig.java:1149)

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(Unknown Source)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
 at java.lang.reflect.Method.invoke(Unknown Source)
 at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
 at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Caused by: org.springframework.beans.BeanInstantiationException:

Could

not
instantiate bean class
[com.coastware.vProbe.model.dao.hibernate.UserDAOHibernate]:
Constructor
threw exception; nested exception is java.lang.IllegalStateException:
InjectorHolder has not been assigned an injector. Use
InjectorHolder.setInjector() to assign an injector. In most cases

this

should be done once inside SpringWebApplication subclass's init()
method.
 at

org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:115)

at

org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:61)

at

org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:877)

 ... 40 more
Caused by: java.lang.IllegalStateException: InjectorHolder has not

been

assigned an injector. Use InjectorHolder.setInjector() to assign an
injector. In most cases this should be done once inside
SpringWebApplication
subclass's init() method.
 at

org.apache.wicket.injection.web.InjectorHolder.getInjector(InjectorHolder.java:64)

at

com.coastware.vProbe.model.dao.hibernate.UserDAOHibernate.<init>(UserDAOHibernate.java:26)

 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
 at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown
Source)
 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown
Source)
 at java.lang.reflect.Constructor.newInstance(Unknown Source)
 at

org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:100)

 ... 42 more
====================>
Error when InjectorHolder line is commented out.
====================>
java.lang.RuntimeException: userDAO is null at

com.coastware.vProbe.service.UserServiceImpl.getUserDAO(UserServiceImpl.java:90)

at

com.coastware.vProbe.service.UserServiceImpl.getUsers(UserServiceImpl.java:68)

at java.lang.reflect.Method.invoke(Unknown Source) at

org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)

at

org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:198)

at $Proxy15.getUsers(Unknown Source) at
java.lang.reflect.Method.invoke(Unknown Source) at

org.apache.wicket.proxy.LazyInitProxyFactory$JdkHandler.invoke(LazyInitProxyFactory.java:416)

at org.apache.wicket.proxy.$Proxy16.getUsers(Unknown Source) at
com.coastware.vProbe.HomePage.<init>(HomePage.java:27) at
java.lang.reflect.Constructor.newInstance(Unknown Source) at

org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:147)

at

org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:66)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:272)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:293)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210)

at

org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)

at

org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1220)

at org.apache.wicket.RequestCycle.step(RequestCycle.java:1297) at
org.apache.wicket.RequestCycle.steps(RequestCycle.java:1399) at
org.apache.wicket.RequestCycle.request(RequestCycle.java:529) at

org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:356)

at

org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:201)

at

org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at

org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at

org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)

at

org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at

org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)

at

org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)

at

org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at

org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)

at

org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:857)

at

org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)

at

org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)

at java.lang.Thread.run(Unknown Source)

Complete stack:

org.apache.wicket.WicketRuntimeException: Can't instantiate page

using

constructor public
com.coastware.vProbe.HomePage(org.apache.wicket.PageParameters) and
argument
at

org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:168)

at

org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:66)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:272)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:293)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210)

at

org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)

at

org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1220)

at org.apache.wicket.RequestCycle.step(RequestCycle.java:1297) at
org.apache.wicket.RequestCycle.steps(RequestCycle.java:1399) at
org.apache.wicket.RequestCycle.request(RequestCycle.java:529) at

org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:356)

java.lang.reflect.InvocationTargetException at
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at
java.lang.reflect.Constructor.newInstance(Unknown Source) at

org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:147)

at

org.apache.wicket.session.DefaultPageFactory.newPage(DefaultPageFactory.java:66)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.newPage(BookmarkablePageRequestTarget.java:272)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.getPage(BookmarkablePageRequestTarget.java:293)

at

org.apache.wicket.request.target.component.BookmarkablePageRequestTarget.processEvents(BookmarkablePageRequestTarget.java:210)

at

org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:91)

at

org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1220)

at org.apache.wicket.RequestCycle.step(RequestCycle.java:1297) at
org.apache.wicket.RequestCycle.steps(RequestCycle.java:1399) at
org.apache.wicket.RequestCycle.request(RequestCycle.java:529) at

org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:356)

====================>

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Re: Re: Re: Re: DAO not getting injected, using springbean

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