Bean Context in Spring

Question

The application works perfectly with the following config files:

My Web.XML is as follows

<servlet>
    <servlet-name>mvc-dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/classes/spring/mvc-dispatcher-servlet.xml</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>mvc-dispatcher</servlet-name>
    <url-pattern>*.do</url-pattern>
</servlet-mapping>

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

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
    /WEB-INF/classes/spring/spring-context.xml,
      /WEB-INF/classes/spring/spring-security.xml
    </param-value>
</context-param>


<!-- Spring Security -->
<filter>
    <filter-name>springSecurityFilterChain</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>

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

My mvc-dispatcher-servlet

<bean
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix">
        <value>/pages/</value>
    </property>
    <property name="suffix">
        <value>.jsp</value>
    </property>
</bean>


<context:component-scan base-package="biz.canisrigel.slapMe" />

<!-- enable autowire -->
<context:annotation-config />

My spring-context.xml is

<bean
    class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix">
        <value>/pages/</value>
    </property>
    <property name="suffix">
        <value>.jsp</value>
    </property>
</bean>

<context:component-scan base-package="biz.canisrigel.slapMe" />

<!-- enable autowire -->
<context:annotation-config />


<bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost/slapMe" />
    <property name="username" value="root" />
    <property name="password" value="adminadmin" />
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource" />
    <property name="typeAliasesPackage" value="biz.canisrigel.slapMe.bean" />
</bean>

<!-- scan for mappers and let them be autowired -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="biz.canisrigel.slapMe.mapper" />
</bean>

I couldn't run spring security properly cause earlier spring-context.xml was the xml config file for dispatcher servlet for MVC. So I moved spring-context to contextConfigLocation. But then I had to provide something to dispatcher servlet.

My problem is that mvc-dispatcher-servlet.xml and spring-context is having same data. If I remove mvc-dispatcher its an error. If I don't place the contents of mvc-dispatcher in spring context then also error occurs.

Where am I going wrong in my understanding of concepts.

ach ach · Accepted Answer · 2013-03-22T19:12:16

A few things:

Your web.xml looks correct
The InternalResourceViewResolver should only exist in your mvc-dispatcher-servlet.xml since it is directly related to MVC -- remove it from your spring-context.xml
You can have context:component-scan in both configuration files, but they should be scanning different packages. The one in your servlet xml will generally be component scanning your controller packages (and anything else directly related to MVC), and the one in your parent spring context xml will generally be scanning your services, DAOs, etc. In general, your component scan packages should be very specific; you should never point it towards the base package of your entire application!
You can remove context:annotation-config -- it is redundant if you have context:component-scan

Bean Context in Spring

2 Answers