Servlets @SessionScoped CDIBean在注入时是一个不同的实例
我的配置是一个bean,我可以在需要的地方将它注入到代码中。然而,当注入时,我会得到一个新的bean实例,而不是会话中的实例 我的豆子:Servlets @SessionScoped CDIBean在注入时是一个不同的实例,servlets,javabeans,cdi,apache-tomee,Servlets,Javabeans,Cdi,Apache Tomee,我的配置是一个bean,我可以在需要的地方将它注入到代码中。然而,当注入时,我会得到一个新的bean实例,而不是会话中的实例 我的豆子: @Named @SessionScoped public class TestModel implements Serializable { private static final long serialVersionUID = 4873651498076344849L; private String version; publ
@Named
@SessionScoped
public class TestModel implements Serializable {
private static final long serialVersionUID = 4873651498076344849L;
private String version;
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public void changeVersion() {
this.version = "Version 2";
System.out.println("New version : " + version + ", Object : " + this);
}
}
当注入到不同的类中时,所有发生的事件都是不同的实例。
用@ApplicationScoped注释bean时,它是同一个实例
我确实需要对bean进行@sessionscope,因为每个用户都应该有自己的配置
该Web应用程序在TomEE 1.7.4上运行
更新:我创建了一个新项目来测试它,SessionScope可以正常工作。我现在需要找出我当前项目的问题所在,以便修复它。
面:
@Named
@SessionScoped
public class TestModel implements Serializable {
private static final long serialVersionUID = 4873651498076344849L;
private String version;
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public void changeVersion() {
this.version = "Version 2";
System.out.println("New version : " + version + ", Object : " + this);
}
}
- CDI 1.0
- 动态Web模块3.0
- Java 1.8
- JSF2.2(MyFacesImpl来自TomEE)
- JPA 2.1
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Project</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<context-param>
<param-name>primefaces.THEME</param-name>
<param-value>omega</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
</web-app>
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
version="2.2">
</faces-config>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
version="1.1" bean-discovery-mode="annotated">
</beans>
项目
index.jsp
状态保存方法:“客户端”或“服务器”(=默认值)。参见JSF规范2.5.2
javax.faces.STATE_保存方法
客户
javax.servlet.jsp.jstl.fmt.localizationContext
资源.应用
主题
欧米茄
javax.faces.PROJECT_阶段
发展
javax.faces.FACELETS\u跳过\u注释
真的
Facesservlet
javax.faces.webapp.FacesServlet
1.
Facesservlet
*.xhtml
faces config.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Project</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<context-param>
<param-name>primefaces.THEME</param-name>
<param-value>omega</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
</web-app>
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
version="2.2">
</faces-config>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
version="1.1" bean-discovery-mode="annotated">
</beans>
beans.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>Project</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<context-param>
<param-name>primefaces.THEME</param-name>
<param-value>omega</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
</web-app>
<?xml version="1.0" encoding="UTF-8"?>
<faces-config
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
version="2.2">
</faces-config>
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/beans_1_1.xsd"
version="1.1" bean-discovery-mode="annotated">
</beans>
有什么想法吗?你做得对。也就是说,从CDI的角度来看,您没有犯任何错误,您想要的是完全合法的,应该可以工作(假设您解决了多个会话的问题,您做到了) 我只是用我自己的一段代码尝试了一下,它按预期工作。你可以。这个样品和你的差不多 然而,我运行的是Wildfly 10,因此它附带了Weld 2.3(Weld是CDI的参考impl)。运行包含OpenWebBeans的TomEE时(另一个CDI实现)
在我看来,您要么错过了一些特定于TOME/OWB的配置(不现实的场景),要么更可能是发现了一个bug。在任何情况下,如果我是你,我会尝试在他们的论坛上提问或在他们的论坛上创建一个问题,因为你的bean/servlet设置再次没有问题。看起来你的测试不起作用:
testModel object = model.TestModel@689a6064
New version : Version 2, Object : model.TestModel@61606aa6
因此,您更新了一个与链接到会话的实例不同的实例(我想说的是,另一个请求没有重用同一个会话)我们在JSF和CDI中都有
@SessionScope
注释。请检查您在旧项目中使用的注释是来自JSF还是来自CDI。
有关的更多信息,我想问题在于会话范围。因为您可能修改了不同的
配置
(来自另一个会话)。请将其更改为Singleton
或ApplicationScoped
并检查问题是否仍然存在。很高兴它能工作,但由于Singleton
和ApplicationScoped
基本相同,当每个用户都有自己的配置时,您是如何解决问题的?您是对的。我同时尝试了两个会话,并且为每个用户更新了值。回到原点。在会话作用域上,servlet中的值不会得到更新:-(但老实说:这没有意义。SessionScoped
应该可以正常工作。请确保在测试期间,您对两个请求使用相同的HTTP会话(request.getSession().getId()
必须相同)。如果会话id每次都不一样,你的问题就在那里。找出为什么会话每次都是新的/不同的…谢谢。我还有一个Wildfly 10,我也会试试。然后我会问OpenWebBeans。我会告诉你我对会话不确定:这就是问题所在。我在更改版本时更新的bean不是sa我是在Servlet中注入的那个。但它应该是相同的。或者我不理解您的评论我的评论是您没有显示如何调用“changeVersion()”,所以可能是您没有重用同一个会话