RequestScope bean and Prime Faces Collector
I got a problem. I have a bean CreateProjectBean which is RequestScope bean. I want to use Prime Faces component called Collector so i can dynamicly change in view createProject table groupRoleAdapters which is a field of CreateProjectBean. Unforuntely every time i click "add" or "remove" in collector, there is a new request being sent to bean, which means, that GroupRoleAdapters is being created once more - of course empty.
My collector code:
<p:panel header="Add group">
<h:panelGrid columns="2">
<h:outputLabel value="Group name: *" for="txt_title"></h:outputLabel>
<h:selectOneMenu id="groupMenu"
value="#{createProjectBean.groupRoleAdapter.groupName}">
<f:selectItems value="#{createProjectBean.groupNames}"
var="group" itemValue="#{group}" itemLabel="#{group}" />
</h:selectOneMenu>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:groupMenu" />
<h:outputLabel value="Role name: *" for="txt_title"></h:outputLabel>
<h:selectOneMenu id="roleMenu"
value="#{createProjectBean.groupRoleAdapter.roleName}">
<f:selectItems value="#{createProjectBean.roleNames}" var="role"
itemValue="#{role}" itemLabel="#{role}" />
</h:selectOneMenu>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:roleMenu" />
<f:verbatim>
<br />
</f:verbatim>
<p:commandButton value="Add" update="creationForm:out"
action="#{createProjectBean.reinit}">
<p:collector value="#{createProjectBean.groupRoleAdapter}"
addTo="#{createProjectBean.selectedGroupRoleAdapters}"/>
</p:commandButton>
</h:panelGrid>
</p:panel>
<f:verbatim>
<br />
</f:verbatim>
<p:outputPanel id="out">
<p:dataTable value="#{createProjectBean.selectedGroupRoleAdapters}"
var="groupRoleAdapter">
<p:column>
<f:facet name="header">
<h:outputText value="Name" />
</f:facet>
<h:outputText value="#{groupRoleAdapter.groupName}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Role" />
</f:facet>
<h:outputText value="#{groupRoleAdapter.roleName}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Operation" />
</f:facet>
<p:commandLink value="Remove" update="creationForm:out">
<p:collector value="#{groupRoleAdapter}" removeFrom="#{createProjectBean.selectedGroupRoleAdapters}" />
</p:commandLink>
</p:column>
</p:dataTable>
</p:outputPanel>
I'd like to use the same instance of bean while adding and removing groupRoleAdapters from list selectedGroupRoleAdapters (represented by collector table), but create new instance of bean every time i try to create new project, so changing scope to sessionScope is not what i can accept.
Thanks in advance for every help.
I attach full code of that view:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.prime.com.tr/ui">
<ui:composition template="/templates/template.xhtml">
<ui:define name="head">
<title>Create Project</title>
<link rel="stylesheet" type="text/css"
href="#{facesContext.externalContext.requestContextPath}/styles/style.css" />
</ui:define>
<ui:define name="content">
<div class="mainTable">
<center><f:view>
<h:outputText id="error" rendered="false" />
<h:message styleClass="errorMessage" for="error" />
<h:form id="creationForm">
<h:panelGrid columns="2" width="420">
<h:panelGroup width="300">
<h:outpu开发者_JS百科tLabel styleClass="formLabel" value="Name: "></h:outputLabel>
</h:panelGroup>
<h:panelGroup>
<h:inputText styleClass="formField" id="name"
value="#{createProjectBean.project.name}" required="true">
<f:validateLength minimum="3" />
</h:inputText>
</h:panelGroup>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:name" />
<h:panelGroup>
<h:outputLabel styleClass="formLabel" value="Short Name: " />
</h:panelGroup>
<h:panelGroup>
<h:inputText styleClass="formField" id="shortname"
value="#{createProjectBean.project.shortname}" required="false">
<f:validateLength maximum="8" />
</h:inputText>
</h:panelGroup>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:shortname" />
<h:panelGroup>
<h:outputLabel styleClass="formLabel" value="Homepage: " />
</h:panelGroup>
<h:panelGroup>
<h:inputText styleClass="formField" id="homepage"
value="#{createProjectBean.project.homepage}" required="false">
</h:inputText>
</h:panelGroup>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:hostname" />
<h:panelGroup>
<h:outputLabel styleClass="formLabel" value="Description: " />
</h:panelGroup>
<h:panelGroup>
<h:inputTextarea styleClass="formField" id="description"
value="#{createProjectBean.project.description}" required="false"
cols="50" rows="10" />
</h:panelGroup>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:description" />
<h:panelGroup>
<h:outputLabel styleClass="formLabel" value="Plugins: " />
</h:panelGroup>
<h:selectManyListbox id="pluginBox"
value="#{createProjectBean.selectedPluginNames}">
<f:selectItems value="#{createProjectBean.pluginNames}"
var="plugin" itemValue="#{plugin}" itemLabel="#{plugin}" />
</h:selectManyListbox>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:pluginBox" />
<h:panelGroup>
<h:outputLabel styleClass="formLabel" value="Tags: " />
</h:panelGroup>
<h:selectManyListbox id="tagBox"
value="#{createProjectBean.project.tags}">
<f:selectItems value="#{createProjectBean.allTags}" var="tag"
itemValue="#{tag}" itemLabel="#{tag.name}" />
</h:selectManyListbox>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:tagBox" />
<f:verbatim>
<br />
</f:verbatim>
<p:panel header="Add group">
<h:panelGrid columns="2">
<h:outputLabel value="Group name: *" for="txt_title"></h:outputLabel>
<h:selectOneMenu id="groupMenu"
value="#{createProjectBean.groupRoleAdapter.groupName}">
<f:selectItems value="#{createProjectBean.groupNames}"
var="group" itemValue="#{group}" itemLabel="#{group}" />
</h:selectOneMenu>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:groupMenu" />
<h:outputLabel value="Role name: *" for="txt_title"></h:outputLabel>
<h:selectOneMenu id="roleMenu"
value="#{createProjectBean.groupRoleAdapter.roleName}">
<f:selectItems value="#{createProjectBean.roleNames}" var="role"
itemValue="#{role}" itemLabel="#{role}" />
</h:selectOneMenu>
<f:verbatim>
<br />
</f:verbatim>
<h:message styleClass="errorMessage" for="creationForm:roleMenu" />
<f:verbatim>
<br />
</f:verbatim>
<p:commandButton value="Add" update="creationForm:out"
action="#{createProjectBean.reinit}">
<p:collector value="#{createProjectBean.groupRoleAdapter}"
addTo="#{createProjectBean.selectedGroupRoleAdapters}"/>
</p:commandButton>
</h:panelGrid>
</p:panel>
<f:verbatim>
<br />
</f:verbatim>
<p:outputPanel id="out">
<p:dataTable value="#{createProjectBean.selectedGroupRoleAdapters}"
var="groupRoleAdapter">
<p:column>
<f:facet name="header">
<h:outputText value="Name" />
</f:facet>
<h:outputText value="#{groupRoleAdapter.groupName}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Role" />
</f:facet>
<h:outputText value="#{groupRoleAdapter.roleName}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Operation" />
</f:facet>
<p:commandLink value="Remove" update="creationForm:out">
<p:collector value="#{groupRoleAdapter}"
removeFrom="#{createProjectBean.selectedGroupRoleAdapters}" />
</p:commandLink>
</p:column>
</p:dataTable>
</p:outputPanel>
<f:verbatim>
<br />
</f:verbatim>
<h:commandButton value="Create" styleClass="formButton"
action="#{createProjectBean.create}" />
</h:panelGrid>
</h:form>
</f:view></center>
</div>
</ui:define>
</ui:composition>
</html>
If you're already on JSF 2.0, just put the bean in view scope, by either @ViewScoped annotation or by <managed-bean-scope>view</managed-bean-scope> in faces-config.xml.
If you're still on JSF 1.x (which I'm afraid of since you're using those ugly JSF 1.0/1.1-mandatory <f:verbatim> tags), then you have to either put bean in session scope, eventually in combination with an unique request scoped parameter which is retained in subsequent requests by h:inputHidden or f:param, or to grab a 3rd party library with a component which is able to save the state of an entire request scoped bean for the subsequent request, like Tomahawk's t:saveState.
加载中,请稍侯......
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