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Asked: 2026-06-04T16:04:51+00:00

Trying to make some experiments with Spring MVC and Spring Security: @Controller @RequestMapping(/auth) public

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Trying to make some experiments with Spring MVC and Spring Security:

@Controller
@RequestMapping("/auth")
public class AuthController {   
    @Autowired
    // @Qualifier("userDetailsService") - tried adding this
    private MyUserDetailsService userDetailsService;
    ...
}

// @Scope("singleton") - tried adding this
@Service("userDetailsService")
public class MyUserDetailsService implements UserDetailsService {
    ...
}

Complete context.xml that I have:

<?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:mvc="http://www.springframework.org/schema/mvc"
    xmlns:security="http://www.springframework.org/schema/security"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
        http://www.springframework.org/schema/security
        http://www.springframework.org/schema/security/spring-security-3.0.xsd">

    <!-- ORIGINAL springmvc-servlet.xml -->
    <mvc:annotation-driven />
    <mvc:resources mapping="/static/**" location="/static/" />

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />
    <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />

    <context:annotation-config />
    <context:component-scan base-package="com.xxxxxxxxx" />
    <!-- end ORIGINAL springmvc-servlet.xml -->

    <!-- FROM springmvc-security.xml -->
    <security:global-method-security secured-annotations="enabled">
    </security:global-method-security>

    <security:http auto-config="true" access-denied-page="/auth/denied">
        <security:intercept-url pattern="/admin/*" access="ROLE_ADMIN"/>        
        <security:intercept-url pattern="/user/*" access="ROLE_USER"/>
        <security:intercept-url pattern="/auth/login" access="IS_AUTHENTICATED_ANONYMOUSLY"/>
        <security:intercept-url pattern="/auth/register" access="IS_AUTHENTICATED_ANONYMOUSLY"/>
        <security:intercept-url pattern="/**" access="IS_AUTHENTICATED_ANONYMOUSLY"/>
        <security:form-login login-page="/auth/login" authentication-failure-url="/auth/login?login_error=true" default-target-url="/user"/>
        <security:logout logout-url="/auth/logout" logout-success-url="/" invalidate-session="true"/>
        <security:openid-login authentication-failure-url="/login?login_error=t" user-service-ref="openIdUserDetailsService" />
    </security:http>

    <security:authentication-manager>
        <security:authentication-provider user-service-ref="userDetailsService" />
    </security:authentication-manager>
    <!-- end FROM springmvc-security.xml -->    
</beans>

For some reason, there are 2 instances of MyUserDetailsService created. The first one is used by Spring Security and the second one is injected to AuthController. What’s the right approach in case I want to have a single instance of MyUserDetailsService?

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1 Answer

  1. Editorial Team

    You haven’t shown enough configuration to be certain, but I’d bet money that you’re confused about how Spring ApplicationContexts should be managed in a Spring MVC app. My answer to another question about the same problem is almost certainly what you need to read:

    Declaring Spring Bean in Parent Context vs Child Context

    You’ve most likely declared your service bean (either explicitly or with a component-scan) in both the root and child contexts of your app. Being a service bean, it should live only in the root context. You may also benefit from reading this answer:

    Spring XML file configuration hierarchy help/explanation

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