How to update Datatable selected rows in JSF using Primefaces?

Question

Well though this question is duplicated somewhat, I have searched over the net still couldn't find the exact result what i want. In my case im developing a project in JSF using Primefaces which has CRUD functionality. i have more than 3k records in p:dataTable . If i want to update selected 5 records, i can only update the whole dataTable(takes much time).

Scenario:

1) select the records in Datatable
2) click p:commandButton to perform business logic and will provide the result for selected records. (In p:commandButton i used datatable updation)

Note: I can only forced to use Primefaces . (I found omniFaces has the solution but i shouldn't use)

Pls help me out!

Answer 1

PrimeFaces will allow you to update component based on styleClass , using PrimeFacesSelectors(PFS).

update="@(.mystyle)"

You can use this to serve your purpose of updating particular row of datatable.
Here is the strategy:
1. Set unique rowKey as styleClass to each of columns for every row.
2. Use that rowKey at PFS for your update attribute.

Here is a short code snippet:

<p:dataTable var="mov" value="#{repeatUIBean.mList}" ro>
    <p:column headerText="mov Name">
        <h:outputText styleClass="#{mov.uniqueId}" value="#{mov.name}"/>
    </p:column>

    <p:column headerText="mov Release Year">
        <h:outputText styleClass="#{mov.uniqueId}" value="#{mov.year}"/>
    </p:column>

    <p:column headerText="Edit mov">
        <p:commandButton value="Edit" update="@(.#{mov.uniqueId})"/>
    </p:column>
</p:dataTable>