Strange behaviour of page with @ViewScoped when is opened twice

Question

I have bean which looks like below:

@ManagedBean(name = "reportDetailsBean")  
@ViewScoped  
public class ReportDetailsBean implements Serializable {  
    // content...  
}

and JSF page with this part of code:

...  
<a4j:queue id="reportQueue" status="globalStatus" />  
<a4j:form id="reportForm#{reportDetailsBean.report.id}" ajaxSingle="true" ajaxSubmit="true" eventsQueue="reportQueue" reRender="reportForm" styleClass="">  
    ...  
    <a4j:outputPanel id="salesItemNameHeader" layout="block" style="cursor: pointer;" rendered="#{reportDetailsBean.model.rowCount gt 0}">  
        <h:outputText value="#{bundle.reportDetails_salesItem}" />  
        <rich:spacer width="4px" />  
        <a4j:support event="onclick" reRender="reportTable" action="#{reportDetailsBean.model['sortTableByColumn']}" status="globalStatus" ajaxSingle="true">  
            <a4j:actionparam name="columnIndex" value="bySalesItemName" assignTo="#{reportDetailsBean.model['currentSortModelItem']}" />  
        </a4j:support>  
    </a4j:outputPanel>  
...

JSF page handles param id from URL. Correct adress of this JSF page is for example localhost/reportDetails.jsp?reportId=37.

Problem occurs when I want open reportDetails.jsp two times - witn different parameters.

There are two scenarios. First one:
1) Open reportDetails.jsp?reportId=1
2) Open reportDetails.jsp?reportId=2
3) reference to ReportDetailsBean instance from reportDetails.jsp?reportId=1 was changed by reference to ReportDetailsBean instance from reportDetails.jsp?reportId=2

Second one:
1) Open reportDetails.jsp?reportId=1
2) Click few times on links like is shown above
3) Open reportDetails.jsp?reportId=2
4) Everything is ok - each view has own instance of ReportDetailsBean

Could someone explain me why in the first scenario reference to isntance of backbean is changed?

score 0 · Answer 1 · edited May 23 '17 at 10:32

0

If you have ViewScoped bean they will live for one view. If you enter another address in browser or to redirection to another page there is another view, and another instance of your view scoped bean.

See also:

Does view scope bean survive Navigation JSF

edited May 23 '17 at 10:32

Community

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answered Mar 12 '13 at 10:09

partlov

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I agree with that but why in first scenario instance from the first view is changed? – Antek Mar 12 '13 at 10:17
How you are navigating? Entering address in browser or forwarding or redirecting? – partlov Mar 12 '13 at 10:22
From the link on another page. – Antek Mar 12 '13 at 10:26

Strange behaviour of page with @ViewScoped when is opened twice

1 Answers1