NoUniqueBeanDefinitionException: Aucun bean qualificatif de type n'est défini: haricot correspondant unique attendu mais trouvé 2

Question

Je reçois l'exception ci-dessous lorsque j'essaie de configurer mon projet Web GAE en utilisant Springs MVC. J'ai utilisé les configurations suivantes dans mes fichiers. J'utilise spring-3.2.3 version de Springs et j'ai spring-bean-3.2.3.jar dans mon classpath déjà.

applicationContext.xml

<?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:context="http://www.springframework.org/schema/context" 
xmlns:util="http://www.springframework.org/schema/util" 
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xsi:schemaLocation="http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans.xsd 
http://www.springframework.org/schema/util 
http://www.springframework.org/schema/util/spring-util-3.2.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.2.xsd"> 

    <context:annotation-config /> 

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

    <bean id="cnManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"> 
     <property name="favorPathExtension" value="true"/> 
     <property name="ignoreAcceptHeader" value="true" /> 
     <property name="defaultContentType" value="text/html" /> 
     <property name="useJaf" value="false"/> 

     <property name="mediaTypes"> 
      <map> 
       <entry key="html" value="text/html" /> 
       <entry key="json" value="application/json" /> 
       <entry key="xml" value="application/xml" /> 
      </map> 
     </property> 
    </bean> 

    <mvc:annotation-driven/> 
    <mvc:annotation-driven content-negotiation-manager="cnManager"/> 

    <bean class="com.myweb.webservices.spring.MvcConfiguringPostProcessor" /> 
</beans> 

ressort servlet.xml

<?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:p="http://www.springframework.org/schema/p" 
xmlns:util="http://www.springframework.org/schema/util" 
xmlns:context="http://www.springframework.org/schema/context" 
xmlns:mvc="http://www.springframework.org/schema/mvc" 
xsi:schemaLocation="http://www.springframework.org/schema/mvc 
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
http://www.springframework.org/schema/beans 
http://www.springframework.org/schema/beans/spring-beans.xsd 
http://www.springframework.org/schema/util 
http://www.springframework.org/schema/util/spring-util-3.2.xsd 
http://www.springframework.org/schema/context 
http://www.springframework.org/schema/context/spring-context-3.2.xsd"> 


    <context:annotation-config /> 
    <context:component-scan base-package="com.myweb.webservices."/> 
    <context:component-scan base-package="com.myweb.webservices.dao"/> 
    <context:component-scan base-package="com.myweb.webservices.service"/> 
    <context:component-scan base-package="com.myweb.webservices.controller"/> 

    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver" 
     p:prefix="/jsp/" p:suffix=".jsp" /> 
</beans> 

GenericDao.java

public interface GenericDao { 
    public <T> void create(T t); 
} 

AbstractGenericDaoImpl.java

public abstract class AbstractGenericDaoImpl implements GenericDao{ 

    static { 
     ObjectifyService.register(User.class); 
    } 

    @Override 
    public <T> void create(T t) { 
     ofy().save().entity(t).now(); 
    } 
} 

GenericService.java

public interface GenericService { 
    public <T> void create(T t); 
} 

AbstractGenericServiceImpl.java

public abstract class AbstractGenericServiceImpl implements GenericService{ 

    @Autowired 
    GenericDao genericDao; 

    @Override 
    public <T> void create(T t) { 
     genericDao.create(t); 
    } 
} 

Exception

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.filterChains': Cannot resolve reference to bean 'org.springframework.security.web.DefaultSecurityFilterChain#0' while setting bean property 'sourceList' with key [0]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.security.web.DefaultSecurityFilterChain#0': Cannot resolve reference to bean 'authenticationFilter' while setting constructor argument with key [2]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authenticationFilter' defined in ServletContext resource [/WEB-INF/spring-security.xml]: Cannot resolve reference to bean 'customAuthenticationManager' while setting bean property 'authenticationManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'customAuthenticationManager': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.myweb.webservices.service.UserService com.myweb.webservices.authentication.CustomAuthenticationManager.userService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com.myweb.webservices.common.dao.GenericDao com.myweb.webservices.common.dao.AbstractGenericServiceImpl.genericDao; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.myweb.webservices.common.dao.GenericDao] is defined: expected single matching bean but found 2: testDao,userDao 
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:329) 
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:107) 
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveManagedList(BeanDefinitionValueResolver.java:353) 
at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:154) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1387) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1128) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) 
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) 
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) 
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) 
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) 
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) 
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:608) 
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932) 
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) 
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389) 
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294) 
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) 
at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548) 
at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) 
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) 
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) 
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130) 
at org.mortbay.jetty.Server.doStart(Server.java:224) 
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) 
at com.google.appengine.tools.development.JettyContainerService.startContainer(JettyContainerService.java:249) 
at com.google.appengine.tools.development.AbstractContainerService.startup(AbstractContainerService.java:307) 
at com.google.appengine.tools.development.AutomaticServerInstanceHolder.startUp(AutomaticServerInstanceHolder.java:26) 
at com.google.appengine.tools.development.AbstractServer.startup(AbstractServer.java:80) 
at com.google.appengine.tools.development.Servers.startup(Servers.java:82) 
at com.google.appengine.tools.development.DevAppServerImpl.start(DevAppServerImpl.java:237) 
at com.google.appengine.tools.development.DevAppServerMain$StartAction.apply(DevAppServerMain.java:339) 
at com.google.appengine.tools.util.Parser$ParseResult.applyArgs(Parser.java:48) 
at com.google.appengine.tools.development.DevAppServerMain.<init>(DevAppServerMain.java:274) 
at com.google.appengine.tools.development.DevAppServerMain.main(DevAppServerMain.java:250) 

Answer 1

L'erreur est

No qualifying bean of type [com.myweb.webservices.common.dao.GenericDao] is defined: expected single matching bean but found 2: testDao,userDao 

Quelque part dans un de vos paquets qui sont composants numérisés, vous créez à la fois un UserDao et un TestDao. Comme il s'agit des deux implémentations de GenericDao, ils sont en conflit et seront utilisés comme cible @Autowired. Je crois que vous devriez vous débarrasser de votre TestDao dans ce contexte.

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Sans voir le reste de votre configuration, dans votre contexte racine

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

et ce dans le contexte de servlet

<context:component-scan base-package="com.myweb.webservices."/> 
<context:component-scan base-package="com.myweb.webservices.dao"/> 
<context:component-scan base-package="com.myweb.webservices.service"/> 
<context:component-scan base-package="com.myweb.webservices.controller"/> 

va créer des haricots en double qui engendreront très probablement plus problèmes. Faites des analyses de composants aussi spécifiques que possible. L'analyse des composants est récursive dans les packages.

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Ce haricot

<bean id="cnManager" class="org.springframework.web.accept.ContentNegotiationManagerFactoryBean"> 
... 

n'est pertinente à votre servlet. Il devrait être dans le contexte de servlet, pas dans le contexte racine.

---

Dans votre contexte de servlet, ne pas oublier de permettre

<mvc:annotation-driven />