EJB的调用

时间：2024-12-17 18:03:45

EJB调用.html

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EJB的调用

调用 EJB

  1. 配置客户端上下文属性
    在应用程序的 classpath 中创建一个“jboss-ejb-client.properties” 文件，我们可以把它放在应用程序的 ejbModule 文件夹下，该文件中包含以下属性： 
     remote.connectionprovider.create.options.org.xnio.Options.SSL_ENABLED=false
    
 remote.connections=default
    
 remote.connection.default.host=localhost
    
 remote.connection.default.port = 4447
    
 remote.connection.default.connect.options.org.xnio.Options.SASL_POLICY_NOANONYMOUS=false
    
 remote.connection.default.username =YOUR_JBOSS_COSOLE_USERNAME
    
 remote.connection.default.password =YOUR_JBOSS_COSOLE_PASSWORD
  2. 给 client 添加所需的 JAR 文件来运行客户端程序
  3. 通过 InitialContext 获得 Context 
     private static Context initialContext;
    
 private static final String PKG_INTERFACES = "org.jboss.ejb.client.naming";
    
 Properties properties = new Properties();
    
 properties.put(Context.URL_PKG_PREFIXES, PKG_INTERFACES);
    
 initialContext = new InitialContext(properties);

  4. 得到 EJB 的jndiName

     //appName 表示部署的 ear 文件的名称部分（不包括 '.ear')
    
 String appName = "";
    
 //moduleName 表示该EJB jar 文件的名称部分
    
 String moduleName = "JPAProject";
    
 /* Jboss 7 允许每个部署有一个（可选）唯一的名字，如果我们没有明确该名字distinctName 为 "" */
    
 String distinctName = "";
    
 //要调用的 EJB 的类名
    
 String beanName = "ProjectBean";
    
 //将 ProjectBean 的 remote 接口放在和 Client 中（包名和 EJB 端相同）
    
 String interfaceName = ProjectBeanRemote.class.getName();

 String jndiName = "ejb:" + appName + "/" + moduleName + "/" +
    
   distinctName + "/" + beanName + "!" + interfaceName;
  5. 获得 EJB 远程接口 
     ProjectBeanRemote PB = (ProjectBeanRemote) context.lookup(jndiName);
  6. 通过接口 PB 调用方法

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