Spring 2.5.1 + EJB3

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Spring Bean EJB JBoss Glassfish

I've gotten Spring 2.5.1 + EJB3 to work on both JBoss and Glassfish. Though, I've also at times run into issues similar to the above (see my thread on this).

Like you, I also placed spring.jar into ${JBOSS_HOME}/server/default/lib.

Here's my current (trivial) setup that works on JBoss 4.2.0.GA (minus the import statements).

My bean interface:

Code:

package foo.ejb;

public interface Service {

  public String getVersion();

}

My Bean implementation:

Code:

package foo.ejb;

@Stateless(name = "service")
public class ServiceBean implements Service {

  @Autowired
  private Delegate delegate;

  public String getVersion() {
    return delegate.getVersion();
  }

}

Delegate is a dependency of ServiceBean :

Code:

package foo.ejb;

public class Delegate {
  public String getVersion() {
    return "1.0";
  }
}

My beanRefContext.xml

Code:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

  <bean class="org.springframework.context.support.ClassPathXmlApplicationContext">
    <constructor-arg type="java.lang.String" value="ejbApplicationContext.xml" />
  </bean>
  
</beans>

And my ejbApplicationContext.xml :

Code:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

  <bean id="delegate" class="foo.ejb.Delegate" />
  
</beans>

And finally, to configure Spring to inject into my EJBs, I used Spring 2.5.1's SpringBeanAutowiringInterceptor . Here's my /META-INF/ejb-jar.xml

Code:

<?xml version="1.0" encoding="UTF-8"?>
<ejb-jar version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_0.xsd">
  <interceptors>
    <interceptor>
      <interceptor-class>org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor</interceptor-class>      
    </interceptor>    
  </interceptors>
  <assembly-descriptor>
    <interceptor-binding>
      <ejb-name>*</ejb-name>
      <interceptor-class>org.springframework.ejb.interceptor.SpringBeanAutowiringInterceptor</interceptor-class>
    </interceptor-binding>
  </assembly-descriptor>
</ejb-jar>

That all goes into foo-ejb.jar .

Next the stuff that goes into foo-web.war , starting with my controller:

Code:

package foo.web;

@Controller
public class IndexController {

  /**
   * Or "service/remote" on JBoss. For Glassfish, remove the suffix.
   */
  @EJB(mappedName = "service/local")
  private Service service;
  
  @RequestMapping("/index.html")
  public void index(ModelMap model) {
    model.addAttribute("version", service.getVersion());
  }

}

The Freemarker template that comprises the view for the above:

Code:

<html>
<body>
<p>Version: ${version}</p>
</body>
</html>

Now, an important point : I had problems on both Glassfish and JBoss getting the JNDI lookup correct because of prefixes and suffixes. The most relevant part of my foo-servlet.xml shows how I avoid the "java:comp/env" prefix:

Code:

<?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"
  xsi:schemaLocation="http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
  http://www.springframework.org/schema/context
  http://www.springframework.org/schema/context/spring-context-2.5.xsd">

  <!--
    Use a custom JNDI bean factory configured not to prepend lookups with "java:comp/env"
  -->
  <bean id="jndiFactory"
    class="org.springframework.jndi.support.SimpleJndiBeanFactory">
    <property name="resourceRef" value="false" />
  </bean>

  <!--
    Configure the CommonAnnotationBeanPostProcessor to always use JNDI lookup (for EJBs)
    and use the custom JNDI bean factory above.
  -->
  <bean
    class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor">
    <property name="alwaysUseJndiLookup" value="true" />
    <property name="jndiFactory" ref="jndiFactory" />
  </bean>

  <!--
    Since we're turning off "annotation-config" in the context:component-scan below, we need
    to explicitly configure an AutowiredAnnotationBeanPostProcessor.
  -->
  <bean
    class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor" />

  <!--
    Configure annotation-based component scanning, instantiation and dependency injection. 
  -->
  <context:component-scan base-package="com.talikos.ese.web.controllers" annotation-config="false" />

  <!--
    Rest of Spring MVC (view resolver, etc.) configuration goes here.
  -->

</beans>

Hope this (lengthy post) helps. I really should blog this.

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Using Spring with EJB 3 | 内容分发网络(CDN)技术研究

2010-05-09 23:02
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