java - EJB 3.2 - 无法正确配置远程客户端

Question

我是 EJB 新手，为了演示目的，我编写了一个非常小的 ejb 组件。它应该做的就是打印“hello”。目前正在努力正确配置远程客户端的InitialContext。我使用的容器是JBoss 7.0。我使用 JaveEE7.0 和 ejb3.2。

ejb 的接口(interface):

package hello;

public interface Hello {

    public String sayHello(String name);
}

bean 本身:

package hello;

import javax.ejb.Remote;
import javax.ejb.Stateless;

@Stateless(name="HelloEJB")
@Remote(Hello.class)
public class HelloBean implements Hello {

    @Override
    public String sayHello(String name) {
        return "Hello, " + name;
    }

}

以及我放置在 EJB 项目中但作为 java 应用程序运行的远程客户端:

package client;

import hello.Hello; 

import java.util.Properties;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;

public class Test {

    public static void main(String[] args) {

        Hello statelessHello = null;
        try {
            statelessHello = lookupStatelessHello(); // the method that throws exception
        } catch (NamingException e) {
            System.out.println("Bean Loading Failed");
            e.printStackTrace();
            Thread.currentThread().stop();
        }       
        Hello stub=(Hello)PortableRemoteObject.narrow(statelessHello, Hello.class);
        System.out.println("obtained a remote stateless hello for invocation");
        System.out.println(stub.sayHello(args[0]));
    }



    private static Hello lookupStatelessHello() throws NamingException {
    // the problematic code:
            Properties jndiProperties = new Properties();
            jndiProperties.put(Context.INITIAL_CONTEXT_FACTORY, "org.jboss.naming.remote.client.InitialContextFactory");
            jndiProperties.put(Context.PROVIDER_URL,"remote://localhost:4447"); // tried to change ports.
            jndiProperties.put("jboss.naming.client.ejb.context", true);
            Context context = new InitialContext(jndiProperties); // exception happens here
            return (Hello) context.lookup("stateless1/HelloEJB!hello.Hello");
        }
    }

当我运行 JBoss 时，我成功地部署了我的 ejb 项目，没有出现任何问题:

13:37:20,141 INFO [org.jboss.as.ejb3.deployment.processors.EjbJndiBindingsDeploymentUnitProcessor] (MSC service thread 1-6) JNDI bindings for session bean named HelloEJB in deployment unit deployment "stateless1.jar" are as follows:

java:global/stateless1/HelloEJB!hello.Hello java:app/stateless1/HelloEJB!hello.Hello java:module/HelloEJB!hello.Hello
java:global/stateless1/HelloEJB java:app/stateless1/HelloEJB
java:module/HelloEJB

13:37:20,255 INFO [org.jboss.as.server.controller] (DeploymentScanner-threads - 2) Deployed "stateless1.jar"

但是当我尝试从远程客户端调用 ejb 时，我得到:

Bean Loading Failed javax.naming.NoInitialContextException: Cannot instantiate class: org.jboss.naming.remote.client.InitialContextFactory [Root exception is java.lang.ClassNotFoundException: org.jboss.naming.remote.client.InitialContextFactory] at javax.naming.spi.NamingManager.getInitialContext(Unknown Source) at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source) at javax.naming.InitialContext.init(Unknown Source) at javax.naming.InitialContext.(Unknown Source) at client.Test.lookupStatelessHello(Test.java:34) at client.Test.main(Test.java:18) Caused by: java.lang.ClassNotFoundException: org.jboss.naming.remote.client.InitialContextFactory at java.net.URLClassLoader.findClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source) at java.lang.ClassLoader.loadClass(Unknown Source) at java.lang.Class.forName0(Native Method)

我尝试过更改端口，尝试添加安全凭证，但我不明白如何添加用户，尝试阅读指南，但坦率地说，因为我是新手，这对我来说相当困难。另外，我很确定我查找 bean 的方式是错误的，但这不是现在的问题。

我希望你能够帮助我找到我在这里做错的事情。如果您需要有关设置的更多信息，请询问。

Answer 1

如上所述，您需要 jboss-client.jar 以及您的代码，才能使其正常工作。具体jar可以在

找到

JBOSS_HOME/bin/client/jboss-client-7.1.0.Final.jar.

另请查看官方文档和 wiki，其中包含完整示例。请参阅here .