How to stop a4j:poll call h:datatable value method?

[spaska]

Hi, My problem is that a4j:poll calls the rich:dataTable value method although I have not set it in the reRender a4j:poll attribute.

The content of the h:dataTable doesn't really change, which is OK, but calling the value method is a big performance overhead for me. I would like this method to be called only once when the page is first open but not on every poll request.

Here is my jsf:

     <a4j:region>
        <h:form id="pollform">
            <a4j:poll reRender="outputA" interval="2000" id="poll" enabled="true" />
        </h:form>
    </a4j:region>

    <h:form id="mainform">
        <h:panelGroup id="outputA">
            <h:outputText value="operationA=#{testPollAction.operationA}"  />
        </h:panelGroup>
        <br/>
        <rich:panel id="outputB">
            <h:outputText value="operationB=#{testPollAction.operationB}"  />
        </rich:panel>
        <rich:dataTable value="#{testPollAction.tableData}" var="record">
            <rich:column>
                <h:outputText value="#{record}"></h:outputText>       
            </rich:column>
        </rich:dataTable>
    </h:form>

and my backing bean in request scope:

public class TestPollAction {
    public String getOperationA(){
        System.out.println("TestPollAction.operationA()");
        return "myA:" + new Date();
    }
   
    public String getOperationB(){
        System.out.println("TestPollAction.opearaionB()");
        return "myB" + new Date();
    }
   
    public List<String> getTableData(){
        System.out.println("TestPollAction.getTableData()");
        List<String> arrayList = new ArrayList<String>();
        arrayList.add(new Date().toString());
        return arrayList;
    }
}

On every poll I have the following written on the server output:

INFO: TestPollAction.operationA()
INFO: TestPollAction.getTableData()

As you can see the operationB() method is not called by poll request. I suppose that getTableData() is called because a value method of a table?

Interesting if I switch from rich:dataTable to h:dataTavle the getTableData() is invoked 4 times on a poll request.

Am I doning something wrong? How can I fix this?

[spaska]

Forgot to mention that I am using 3.3.3 FInal

[ilya_shaikovsky]

add limittolist=true to poll.https://jira.jboss.org/browse/RF-3341

[spaska]

Thank you for replying. One addition from my side: You should use rich:dataTable in order for limitToList="true" to work properly.

If I use h:dataTable even though I use limitToList="true" for the a4j:poll the table value method continues to get caught 4 times at a poll request!

Using rich:dataTable is OK for me. Hope it is for the rest!

[ilya_shaikovsky]

we will pay attention to that during 4.x development so thanks for your input!