SOA服务使用spring获取null ejb实例 [英] SOA service gets null ejb instance using spring

问题描述

我有一个maven项目实现apache cxf web服务和ejb对象，我试图使用spring注入ejb实例，当我运行程序时，spring容器将ejb bean返回为空。我不明白如何将ejb实现与spring bean相关联。

该项目有一个apache cxf实现，这样：

ServiceBindingImpl

  @WebService（endpointInterface =cl.flying.binding.ServiceBinding）
 public class ServiceBindingImpl实现ServiceBinding {
 private ServiceBusinessLocal serviceEjb 
 public void setServiceEjb（ServiceBusinessLocal serviceEjb ）{
 this.serviceEjb = serviceEjb 
} 
 public String sayHello（String request）{
 return serviceEjb.sayHello（request）; 
} 
} 
 

它还有一个弹簧配置订单实现DI，applicationContext.xml

 < bean id =serviceEjb
 class =org.springframework .ejb.access.LocalStatelessSessionProxyFactoryBeanscope =request> 
< property name =jndiNamevalue =ejb / ServiceBusinessImpl/> 
< property name =businessInterfacevalue =cl.service.business.ServiceBusinessLocal/> 
< property name =resourceRefvalue =true/> 
< / bean> 
< bean id =ServiceControllerclass =cl.flying.binding.ServiceBindingImpl> 
< property name =serviceEjbref =serviceEjb/> 
< / bean> 
  

这是业务层，无状态ejb实现：

  @Stateless（mappedName =ejb / ServiceBusiness）
 public class ServiceBusinessImpl实现ServiceBusinessLocal 
 public String sayHello（String request ）{
 returnhello：+ request; 
} 
} 
 

如何实例化ejb对象？

解决方案

以下是我用作部分POC的bean配置文件。

 <？xml version =1.0encoding =UTF-8？> 
< beans xmlns =http://www.springframework.org/schema/beans
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance
 xmlns：jee =http://www.springframework.org/schema/jee
 xmlns：util =http://www.springframework.org/schema/util
 xmlns ：context =http://www.springframework.org/schema/context
 xsi：schemaLocation =http://www.springframework.org/schema/jee http://www.springframework.org/ schema / jee / spring-jee-4.2.xsd 
 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd 
 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd 
 http://www.springframework.org/schema / util http://www.springframework.org/schema/util/spring-util-4.2.xsd\"> 
 
< jee：remote-slsb id =calculatorRemotebusiness-interface =com.kp.swasthik.remote.CalculatorRemotejndi-name =java：kp-ejb / Calculator！ kp.swasthik.remote.CalculatorRemotelookup-home-on-startup =true> 
< jee：environment> 
 java.naming.factory.initial = org.jboss.naming.remote.client.InitialContextFactory 
 java.naming.provider.url = http-remoting：// localhost：8080 
 jboss。 naming.client.ejb.context = true 
 java.naming.security.principal = username 
 java.naming.security.credentials = password 
< / jee：environment> 
< / jee：remote-slsb> 
 
< context：component-scan base-package =com.kp.swasthik.jaxws>< / context：component-scan> 
 
< util：properties id =remoteRef> 
< prop key =java.naming.factory.initial> org.jboss.naming.remote.client.InitialContextFactory< / prop> 
< prop key =java.naming.provider.url> remote：// localhost：4447< / prop> 
< prop key =java.naming.factory.url.pkgs> org.jboss.ejb.client.naming< / prop> 
< / util：properties> 
 
< / beans> 
  

并注入如下所示的bean。

  @Service 
 @WebService 
 public class KPService {
 
 @Autowired 
 CalculatorRemote calc; 
 
 @WebMethod 
 public int add（int a，int b）{
 return calc.add（a，b）; 
} 
 
 
 @WebMethod 
 public Result subtract（Input num）{
 return calc.subtract（num）; 
} 
 
} 
  

注意：以上配置用于Wildfly / JBOSS EAP，您可能需要相应地更改为您的应用服务器

I have a maven project that implements apache cxf web service and a ejb object, I'm trying inject the ejb instance using spring, when I run the program, the spring container returns the ejb bean as a null. I don't understand how to relate the ejb implementation with the spring bean.

The project has a apache cxf implementation, this way:

ServiceBindingImpl

@WebService(endpointInterface = "cl.flying.binding.ServiceBinding")
public class ServiceBindingImpl implements ServiceBinding { 
    private ServiceBusinessLocal serviceEjb
    public void setServiceEjb(ServiceBusinessLocal serviceEjb) {
        this.serviceEjb = serviceEjb
    }
    public String sayHello(String request) {
        return serviceEjb.sayHello(request);
    }
}

It also has a spring configuration in order to achieve DI, applicationContext.xml

<bean id="serviceEjb"
    class="org.springframework.ejb.access.LocalStatelessSessionProxyFactoryBean" scope="request">
    <property name="jndiName" value="ejb/ServiceBusinessImpl" />
    <property name="businessInterface" value="cl.service.business.ServiceBusinessLocal" />
    <property name="resourceRef" value="true" />
</bean>
<bean id="ServiceController" class="cl.flying.binding.ServiceBindingImpl">
    <property name="serviceEjb" ref="serviceEjb" />
</bean>

That is the business tier, Stateless ejb implementation:

@Stateless(mappedName="ejb/ServiceBusiness")
public class ServiceBusinessImpl implements ServiceBusinessLocal
    public String sayHello(String request) {
        return "hello: " + request;
    }
}

How can I instantiate the ejb object?

解决方案

Here is the bean configuration file I used as part POC sometime back

<?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:jee="http://www.springframework.org/schema/jee"
    xmlns:util="http://www.springframework.org/schema/util"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-4.2.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-4.2.xsd">

    <jee:remote-slsb id="calculatorRemote" business-interface="com.kp.swasthik.remote.CalculatorRemote" jndi-name="java:kp-ejb/Calculator!com.kp.swasthik.remote.CalculatorRemote" lookup-home-on-startup="true" >
        <jee:environment>
             java.naming.factory.initial=org.jboss.naming.remote.client.InitialContextFactory
             java.naming.provider.url=http-remoting://localhost:8080
             jboss.naming.client.ejb.context=true
             java.naming.security.principal=username
             java.naming.security.credentials=password
        </jee:environment>
    </jee:remote-slsb>

    <context:component-scan base-package="com.kp.swasthik.jaxws"></context:component-scan>

    <util:properties id="remoteRef">
        <prop key="java.naming.factory.initial">org.jboss.naming.remote.client.InitialContextFactory</prop>
        <prop key="java.naming.provider.url">remote://localhost:4447</prop>
        <prop key="java.naming.factory.url.pkgs">org.jboss.ejb.client.naming</prop>
    </util:properties>

</beans>

And injecting the bean as shown below.

@Service
@WebService
public class KPService {

    @Autowired
    CalculatorRemote calc;

    @WebMethod
    public int add(int a, int b){
        return calc.add(a, b);
    }


    @WebMethod
    public Result subtract(Input num){
         return calc.subtract(num);
    }

}

NOTE: The above configuration is for Wildfly/JBOSS EAP, you might need to change accordingly to your app server

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