[英]Session lost in Google App Engine using JSF
我已按照以下指示在Google App Engine应用程序中配置了JSF 2.1:
该应用程序在本地运行时可以完美运行,但是在Google App Engine上部署时,该会话会丢失,例如:更新页面中的任何其他组件时,这些组件值会丢失,并且SessionScope支持bean字段也会丢失。
我的web.xml文件是:
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<web-app
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="2.5"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>JavaServerFaces</display-name>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.expressionFactory</param-name>
<param-value>org.jboss.el.ExpressionFactoryImpl</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.enableThreading</param-name>
<param-value>false</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Production</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<param-name>primefaces.UPLOADER</param-name>
<param-value>commons</param-value>
</context-param>
<context-param>
<param-name>primefaces.THEME</param-name>
<param-value>home</param-value>
</context-param>
<!-- ***** Specify session timeout of thirty (30) minutes. ***** -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<!-- Welcome page -->
<welcome-file-list>
<welcome-file>faces/home.xhtml</welcome-file>
</welcome-file-list>
<!-- JSF mapping -->
<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>/faces/*</url-pattern>
<url-pattern>*.jsf</url-pattern>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
<!-- Primefaces -->
<filter>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
<init-param>
<param-name>thresholdSize</param-name>
<param-value>2147483647</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
<error-page>
<exception-type>javax.faces.application.ViewExpiredException</exception-type>
<location>/faces/home.xhtml</location>
</error-page>
<!-- System -->
<servlet>
<servlet-name>SystemServiceServlet</servlet-name>
<servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class>
<init-param>
<param-name>services</param-name>
<param-value/>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>SystemServiceServlet</servlet-name>
<url-pattern>/_ah/spi/*</url-pattern>
</servlet-mapping>
</web-app>
和appengine-web.xml文件:
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE project>
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>id</application>
<version>1</version>
<!-- Allows App Engine to send multiple requests to one instance in parallel: -->
<threadsafe>true</threadsafe>
<!-- Configure java.util.logging -->
<system-properties>
<property name="java.util.logging.config.file" value="WEB-INF/logging.properties" />
</system-properties>
<sessions-enabled>true</sessions-enabled>
<async-session-persistence enabled="false" />
</appengine-web-app>
JSF会话真的可以在Google App Engine中工作吗? 我是否配置错误?
先感谢您
这是一个普遍的问题。 您需要执行的是强制会话序列化。 这可以通过执行以下操作来完成:
您需要执行类似操作的原因是,在构造视图树时,将其添加到会话中...然后您的业务逻辑对视图树中的组件进行了更改,但不幸的是,对这些视图的更改变量不会引发任何通知GAE重新序列化的事件。 这就是为什么您会看到ViewExpiredExceptions或未存储数据等的原因。
该概念本质上与其他视图技术可能遇到的markDirty()概念相似。
基于对Harsha答案的理解,我发布了我对其他人感兴趣的解决方案。
在GaeSession.java中:
public class GaeSession implements PhaseListener {
private static final long serialVersionUID = 1L;
@Override
public void afterPhase(PhaseEvent arg0) {
FacesContext.getCurrentInstance().getExternalContext().getSessionMap().put("CURRENT_TIME", System.currentTimeMillis());
}
@Override
public void beforePhase(PhaseEvent arg0) {
}
@Override
public PhaseId getPhaseId() {
return PhaseId.ANY_PHASE;
}
}
在faces-config.xml中:
<?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">
<lifecycle>
<phase-listener>package.GaeSession</phase-listener>
</lifecycle>
</faces-config>
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.