Request for help related to t:dataList calling my bean method twice

Question

Hello,
I'm trying to use <t:dataList> from myFaces library: I'm getting the data that i wanted on the UI. However, my method on the bean is getting called twice when i use t:dataList.
If i use, <UI:repeat> instead of <t:dataList>, everything is fine (meaning my method gets called only once which is the expected behavior).
Did anybody come across this issue with <t:dataList>?
Thank you in advance,
Here is my code:
<t:dataList value="#{logBean.interactionsList}" var="e" rowIndexVar="index">
<tr class="#{index mod(2) !=0?'evenRow':''}">
<td>#{index+1}</td>
<td>#{e.name}</td>
<td>#{e.notes}</td>
</tr>
</t:dataList>

Answer 1

Which method do you mean? I'm assuming the getter for the value binding? If that is the case, you may need to learn to live with it. This seems to be the typical behavior of JSF components (i.e., do not cache the value of EL expressions, instead re-evaluate). In some cases this is the behavior you want.
Now that you know the components will be doing this, the trick is to move the caching (if applicable) to your bean. In other words, if the value of getter is the result of a long running process, save it in an instance variable for the next invocation.