如何在JBOSS中获取SessionContext [英] How to get SessionContext in JBOSS

问题描述

我在会话bean中尝试了几种方式，如：

  @Resource 
 private SessionContext ctx; 
  

或

  private SessionContext ctx; 
 
 @Resource 
 private void setSessionContext（SessionContext ctx）{
 this.sctx = ctx; 
} 
  

或

  InitialContext ic = new InitialContext（）; 
 SessionContext ctx =（SessionContext）ic.lookup（java：comp / env / sessionContext）; 
  

他们没有工作，在JBOSS中发生了异常异常。

我真的很生气任何人都可以告诉我怎么了非常感谢！

解决方案

两个第一个解决方案（现场注入和setter方法注入）看起来很好，应该工作。

我对第三个（查找方法）有疑问，因为您没有显示相应的 @Resource（name =sessionContext）注释，但如果正确使用，它也应该工作。

第四个选项是查找标准名称 java：comp / EJBContext

  @Stateless 
 public class HelloBean实现com.foo.ejb.HelloRemote {
 public void hello（）{
 try {
 InitialContext ic = new InitialContext（）; 
 SessionContext sctxLookup = 
（SessionContext）ic.lookup（java：comp / EJBContext）; 
 System.out.println（通过标准名称查找EJBContext：+ sctxLookup）; 
} catch（NamingException ex）{
 throw new IllegalStateException（ex）; 
} 
} 
} 
  

这四种方法都是EJB 3符合，并且应该与任何Java EE 5应用服务器一起工作，如在在EJB 3中获取EJBContext的4种方法。请提供您没有获得的异常的完整堆栈跟踪。

I tried several ways in the session bean, like:

@Resource
private SessionContext ctx;

OR

private SessionContext ctx;

@Resource
private void setSessionContext(SessionContext ctx) {
  this.sctx = ctx;
}

OR

InitialContext ic = new InitialContext();
SessionContext ctx = (SessionContext) ic.lookup("java:comp/env/sessionContext");

None of them worked, differnet exceptions occured in JBOSS.

I really get mad about it. Anyone could tell me what's wrong. Thanks a lot!

解决方案

The two first solutions (field injection and setter method injection) look fine and should work.

I have a doubt about the third one (the lookup approach) as you didn't show the corresponding @Resource(name="sessionContext") annotation but it should work too if properly used.

A fourth option would be to look up the standard name java:comp/EJBContext

@Stateless
public class HelloBean implements com.foo.ejb.HelloRemote {
  public void hello() {
    try {
      InitialContext ic = new InitialContext();
      SessionContext sctxLookup = 
          (SessionContext) ic.lookup("java:comp/EJBContext");
      System.out.println("look up EJBContext by standard name: " + sctxLookup);
    } catch (NamingException ex) {
      throw new IllegalStateException(ex);
    }
  }
}

These four approaches are all EJB 3 compliant and should definitely work with any Java EE 5 app server as reminded in 4 Ways to Get EJBContext in EJB 3. Please provide the full stack trace of the exception that you get if they don't.

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