问题描述
我有一个具有2个Web应用程序的JavaEE应用程序。我还具有另一个包含由 @ApplicationScoped
I have an JavaEE Application that has 2 web applications. I also have another library web module that contains common_bean that annotated by @ApplicationScoped
注释的common_bean的库Web模块。我的问题是：我可以共享吗
My question is: Can I share common_bean instance across the two web applications?
已更新-我做了测试
在Web App1（/ web1）
@WebServlet("/Servlet1")
public class Servlet1 extends HttpServlet {
@Inject
CommonBean commonBean;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
commonBean.setValue("Servlet1: " + System.currentTimeMillis() + "--" + commonBean);
}
}
在Web App2（/ web2）
@WebServlet("/Servlet2")
public class Servlet2 extends HttpServlet {
@Inject
CommonBean commonBean;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
commonBean.setValue("Servlet2: " + System.currentTimeMillis() + "--" + commonBean);
}
}
结果
-
如果我先运行/ Web1 / Servlet1，然后运行/ Web2 / Servlet2：
If I run /Web1/Servlet1 FIRST then Run /Web2/Servlet2:
/ Web1 / Servlet1 -------工作
/Web1/Servlet1 ------- Worked
/ Web2 / Servlet2 -------发生CDI异常失败
/Web2/Servlet2 ------- Failed with CDI exception
如果我先运行/ Web2 / Servlet2，然后运行/ Web1 / Servlet1 ：（重新启动服务器，然后重新测试）
If I run /Web2/Servlet2 FIRST then Run /Web1/Servlet1: ( Restart server then re-test)
/ Web2 / Servlet2 -------工作
/Web2/Servlet2 ------- Worked
/ Web1 / Servlet1 -------发生CDI异常失败
/Web1/Servlet1 ------- Failed with CDI exception
任何评论！
推荐答案
我发现了问题。我喜欢在这里发布解决方案。它可能会帮助某人：
I found the issue. I like to post the solution here. It may help someone:
解决方案：将Web库模块配置为EAR Module Assembly（库jar模块）-这样，
The solution is: Configure the Web library module as EAR Module Assembly (Lib jar module) - By doing this, only instance of Common bean created and this instance will be shared across all web applications in the same EAR.
我不确定这是否是CDI规范，但是它确定CDI规范。在Glassfish& fly。
I am not sure this is a specification of CDI or NOT but it worked on both Glassfish & Wildfly.
这篇关于我们可以在同一EAR中跨Web应用程序共享CDI @ApplicationScoped bean实例吗？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！