通过使用Vaadin-CDI集成插件，将EJB注入到Vaadin 7 UI中
我无法成功整合官方的Vaadin-CDI-Integration-Addon，因为在完成官方整合说明之后，以下异常被抛出，以防万一重新加载已发布的URL localhost：8080 / App /？restartApplication 。
I wasn't able to successfully integrate the official Vaadin-CDI-Integration-Addon, since after finishing the official integration instructions, the following Exception was thrown in case I reloaded the already published URL localhost:8080/App/?restartApplication.
javax.servlet.ServletException: com.vaadin.server.ServiceException:
java.lang.IllegalStateException: UI id has already been defined
以下几个解决方法是一个经过测试的工作解决方案，可以完成官方说明。
The following little workaround is a tested, working solution, which completes the official instructions.
您必须执行以下步骤才能将官方CDI-Integration-Addon成功整合到您的Vaadin项目中。
You have to work off the following steps to successfully integrate the official CDI-Integration-Addon into your Vaadin project.
- 根据 p_p_col_id =行1和; p_p_col_pos = 2及P_ p_col_count = 4& _36_struts_action =％2Fwiki％2Fview& p_r_p_185834411_nodeName = vaadin.com + wiki& p_r_p_185834411_title = Vaadin + CDIrel =nofollow>在官方how-to 。
- 从URL中删除
？restartApplication参数。这样避免了异常。 - 按照下面的清单注入EJB。
- 请注意，如果需要，请手动重新启动应用程序！
- Do exactly as stated in the official how-to.
- Remove the
?restartApplicationparameter from the URL. This avoids theException. - Inject the EJB as shown in the listing below.
- Keep in mind to restart your application manually if necessary!
@CDIUI
public class ExampleCDIUI extends UI {
@Inject
MyLocalBeanInterface myBean;
@Override
public void init(VaadinRequest request) {
Label label = new Label("Hello Vaadin user");
setContent(label);
// myBean should be accessible now.
}
}
就是这样。我希望这有助于： - ）
That's it. I hope this helps :-)