java ee - JSF Expired ViewScope issue -
i using jsf2.2 & tomcat 6.0.35. have application, display & edit user details. sending ajax request processing on change of each input edit details & updating form.
when try change input after long idle time (after 30 mins), getting nullpointerexception managed bean instance variable. server has cleaned instantiations idle long time, client-browser doesn’t know ?
here code.
commontemplate.xhtml
<!doctype html> <html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:c="http://java.sun.com/jsp/jstl/core" xmlns:ui="http://java.sun.com/jsf/facelets"> <h:head> <title> vsp </title> <meta http-equiv="expires" content="0"/> <meta http-equiv="pragma" content="no-cache"/> <meta http-equiv="cache-control" content="no-cache"/> <meta http-equiv="content-type" content="text/html; charset=utf-8" /> <link rel="stylesheet" href="vsp.css" type="text/css" /> <script type="text/javascript"> //<![cdata[ jquery("#designform :input[type='text']:enabled:not([readonly='readonly'])").live('change', function(){ var componentid = jquery(this).attr("id"); validateinputdata(componentid); var validform = (jquery(".errormsg").length == 0) ? true : false; if(validform){ jquery("#submitdesignform").click(); } }); </script> </h:head> <h:body> <div id="header"> <ui:insert name="commonheader"> <ui:include src="header.xhtml" /> </ui:insert> </div> <div id="content"> <ui:insert name="commonbodycontent"> <h:form id="designform" prependid="false" autocomplete="off"> common body content. <h:commandlink id="submitdesignform" style="display:none;"> <f:ajax execute="@form" render="@form" listener="#{designbean.processdetails}"/> </h:commandlink> </h:form> </ui:insert> </div> <div id="footer"> <ui:insert name="commonfooter"> <ui:include src="footer.xhtml" /> </ui:insert> </div> </h:body> </html> showdetails.xhtml
<ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets" template="commontemplate.xhtml"> <ui:define name="commonbodycontent"> <table> <tr> <td>name</td> <td>#{designbean.person.name}</td> </tr> <tr> <td>age</td> <td>#{designbean.person.age}</td> </tr> <tr> <td>email</td> <td>#{designbean.person.email}</td> </tr> <tr> <td>nationality</td> <td>#{designbean.person.nation}</td> </tr> <tr> <td>date-of-birth</td> <td>#{designbean.person.dob}</td> </tr> .........; ..........; </table> </ui:define> </ui:composition> editdetails.xhtml ------------------ <ui:composition xmlns="http://www.w3.org/1999/xhtml" xmlns:f="http://java.sun.com/jsf/core" xmlns:h="http://java.sun.com/jsf/html" xmlns:ui="http://java.sun.com/jsf/facelets" template="commontemplate.xhtml"> <ui:define name="commonbodycontent"> <table> <tr> <td>name</td> <td><h:inputtext value="#{designbean.person.name}" /></td> </tr> <tr> <td>age</td> <td><h:inputtext value="#{designbean.person.age}" /></td> </tr> <tr> <td>email</td> <td><h:inputtext value="#{designbean.person.email}" disabled="true"/></td> </tr> <tr> <td>nationality</td> <td><h:inputtext value="#{designbean.person.nation}" /></td> </tr> <tr> <td>date-of-birth</td> <td><h:inputtext value="#{designbean.person.dob}" /></td> </tr> .........; ..........; </table> </ui:define> </ui:composition> web.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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemalocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="webapp_id" version="2.5"> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <context-param> <param-name>javax.faces.facelets_skip_comments</param-name> <param-value>true</param-value> </context-param> <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>javax.faces.separator_char</param-name> <param-value>_</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>javax.faces.project_stage</param-name> <param-value>development</param-value> </context-param> <context-param> <param-name>javax.faces.datetimeconverter_default_timezone_is_system_timezone</param-name> <param-value>true</param-value> </context-param> <context-param> <param-name>com.sun.faces.disableunicodeescaping</param-name> <param-value>true</param-value> </context-param> <filter> <filter-name>characterencodingfilter</filter-name> <filter-class>org.omnifaces.filter.characterencodingfilter</filter-class> </filter> <filter-mapping> <filter-name>characterencodingfilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <filter> <filter-name>nocachefilter</filter-name> <filter-class>org.omnifaces.filter.cachecontrolfilter</filter-class> </filter> <filter-mapping> <filter-name>nocachefilter</filter-name> <servlet-name>facesservlet</servlet-name> </filter-mapping> <filter> <filter-name>facesexceptionfilter</filter-name> <filter-class>org.omnifaces.filter.facesexceptionfilter</filter-class> </filter> <filter-mapping> <filter-name>facesexceptionfilter</filter-name> <servlet-name>facesservlet</servlet-name> </filter-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> </servlet-mapping> <error-page> <exception-type>javax.faces.application.viewexpiredexception</exception-type> <location>/viewexpired.faces</location> </error-page> <error-page> <exception-type>java.sql.sqlexception</exception-type> <location>/systemunavailable.faces</location> </error-page> <error-page> <exception-type>java.lang.runtimeexception</exception-type> <location>/error.faces</location> </error-page> <error-page> <error-code>500</error-code> <location>/error.faces</location> </error-page> <error-page> <error-code>403</error-code> <location>/invalidaccess.faces</location> </error-page> <error-page> <error-code>404</error-code> <location>/notfound.faces</location> </error-page> <security-constraint> <display-name>restrict raw xhtml documents</display-name> <web-resource-collection> <web-resource-name>xhtml</web-resource-name> <url-pattern>*.xhtml</url-pattern> </web-resource-collection> <auth-constraint /> </security-constraint> </web-app> designbean
@viewscoped @managedbean(name="designbean") public class designbean implements serializable{ @managedproperty(value = "#{userbean}") private userbean userbean; @managedproperty("#{userservice}") private userservice userservice; // application scoped managed bean eager true. private person person; @postconstruct public void initbean(){ system.out.println("designbean created!"); person = new person(); string useremail = userbean.getuseremail(); if(useremail!=null && !useremail.isempty()){ person = userservice.getuserdetails(useremail); } } public void processdetails(){ person.setlastupdatetime(new date()); // getting npe here, person object null after long idle time. userservice.updateuser(person); } public void setuserbean(userbean userbean) { this.userbean = userbean; } public userbean getuserbean() { return userbean; } public void setuserservice(userservice userservice) { this.userservice = userservice; } public userservice getuserservice() { return userservice; } public void setperson(person person){ this.person = person; } public person getperson(){ return person; } } person
public class person implements serializable { private string name; private integer age; private string email; private string nation; private string dob; private date lastupdatetime; public string getname() { return name; } public void setname(string name) { this.name = name; } public integer getage() { return age; } public void setage(integer age) { this.age = age; } public string getemail() { return email; } public void setemail(string email) { this.email = email; } public string getnation() { return nation; } public void setnation(string nation) { this.nation = nation; } public string getdob() { return dob; } public void setdob(string dob) { this.dob = dob; } public void setlastupdatetime(date lastupdatetime){ this.lastupdatetime = lastupdatetime; } public date getlastupdatetime(){ return lastupdatetime; } }
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