Init method gets called twice in @Viewscoped bean
I am using schedule component of Primefaces. I am filling it with values from database and when the user selects sth from the selectonemenu an ajax event is triggered (I tried to put just the related code, if there is sth missing pls remind me):
xhtml:
<h:outputText value="Scope :" />
<h:selectOneMenu id="scope" value="#{scheduleView.scope}">
<f:selectItems value="#{lookup.scopeCombo}"/>
<p:ajax process="scope" update="schedule, scheduleForm, scheduleFormPG" listener="#{scheduleView.changeScopeType()}"/>
</h:selectOneMenu>
<p:schedule id="schedule" value="#{scheduleView.model}" editable="true"/>
Backing bean:
@ManagedBean
@ViewScoped
public class ScheduleView implements Serializable {
@PostConstruct
public void init() {
System.out.println("Init ");
scopeChange();
}
public void scopeChange(String scope){
System.out.println("scopeChange ");
model.clear();
events = (List<Event>) commonServis.bringEverythingByCriteria(Event.class, "scope" , scope);
for(int i= 0; i<events.size();i++){
model.addEvent(new DefaultScheduleEvent(events.get(i).getAd(), events.get(i).getStartDate(),events.get(i).getEndDate()));
}
public void changeScopeType() {
System.out.println("changeScopeType ");
scopeChange (scope);
}
The output of the above code is:
Init
scopeChange
When the user changes the value in the selectonemenu:
changeScopeType
Init
scopeChange
It is supposed to go into init method just once. But after the changeScopeType function is triggered it gets into the init method and fills the schedule with unrelated data. I thought it might be related to @Postconstruct annotation but I couldn't find any related explanation. Can anyone understand the reason and offer a solution?
Here is the full page:
<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://prime.primefaces.org/ui"
template="templates/layout.xhtml"
xmlns:c="http://java.sun.com/jsp/jstl/core">
<ui:define name="title">#{labels.schedule}</ui:define>
<ui:define name="content">
<h:form id="scheduleForm">
<h:panelGrid id="scheduleFormPG">
<p:growl id="msgs" />
<p:dialog modal="true" widgetVar="statusDialog" header="Status" draggable="false">
<h:graphicImage value="resources/images/ajax-loader.gif" />
</p:dialog>
<p:dialog showEffect="explode" hideEffect="explode" resizable="false"
header="warning" widgetVar="confirmationErase" appendToBody="true" modal="true">
<h:outputText value="Are you sure?"/>
<br/>
<p:commandButton value="Yes" actionListener="#{scheduleView.deleteEvent(AE)}"
update="msgs, scheduleFormPG, schedule, wrapperPanel"
onstart="statusDialog.show(),confirmationErase.hide()"
oncomplete="statusDialog.hide(), eventDialog.hide()" process="@parent, scope" />
<p:commandButton value="No" onclick="confirmationErase.hide()" type="button" />
</p:dialog>
<h:outputText value="scope :" />
<h:selectOneMenu id="scope" value="#{scheduleView.scope}">
<f:selectItems value="#{lookup.scopeTypeCombo}"/>
<p:ajax process="scope" update="schedule, scheduleForm, scheduleFormPG" listener="#{scheduleView.changeScopeType()}"/>
</h:selectOneMenu>
</h:panelGrid>
<p:schedule onDateSelectUpdate="wrapperPanel"
onEventSelectUpdate="wrapperPanel" onEventSelectComplete="eventDialog.show()" eventSelectListener="#{scheduleView.onEventSelect}"
onDateSelectComplete="eventDialog.show();" dateSelectListener="#{scheduleView.onDateSelect}" id="schedule" value="#{scheduleView.model}" editable="true"/>
<p:dialog id="dialog111" widgetVar="eventDialog" header="Event Information" showEffect="clip" hideEffect="clip">
<p:panel id="wrapperPanel">
<h:panelGrid id="eventDetails" columns="2">
<h:outputLabel for="eventName" value="Event Name *: " />
<p:inputText id="eventName" value="#{scheduleView.event.title}" required="true"/>
<h:outputLabel value="Start Date:" />
<p:calendar id="sKalender" value="#{scheduleView.event.startDate}">
<f:convertDateTime pattern="dd/MM/yyyy" />
</p:calendar>
<h:outputLabel value="End Date:" />
<p:calendar id="eKalender" value="#{scheduleView.event.endDate}">
<f:convertDateTime pattern="dd/MM/yyyy" />
</p:calendar>
<h:outputLabel value="All Day:" />
<h:selectBooleanCheckbox id="allDay" value="#{scheduleView.event.allDay}" />
<h:outputLabel value="scope: " />
<h:selectOneMenu id="scopeChoice" value="#{scheduleView.event.scope}">
<f:selectItems value="#{lookup.scopeTypeCombo}"/>
</h:selectOneMenu>
<p:commandButton onclick="confirmationErase.show()" oncomplete="eventDialog.hide()" update="wrapperPanel, msgs, schedule" type="reset" value="Delete" />
<p:commandButton value="Save" actionListener="#{scheduleView.addEvent(AE)}" process="@parent, scope" update="schedule wrapperPanel msgs scheduleForm" oncomplete="eventDialog.hide();"/>
</h:panelGrid>
</p:panel>
</p:dialog>
</h:form>
</ui:define>
</ui:composition>
Answer
The problem was this line of code:
<p:ajax process="scope" update="schedule, scheduleForm, scheduleFormPG" listener="#{scheduleView.changeScopeType()}"/>
update was refreshing the whole page, instead it should've only update schedule. When I change it to:
update="schedule"
the problem solved. Thanks everyone for their effort.