<netui-data:callPageFlow> Tag

Calls methods on the Controller file (= JPF file) in the same directory as the JSP page.

Syntax

<netui-data:callPageFlow
    [failOnError="failOnError"]
    method="method"
    [object="object"]
    [resultId="resultId"] />

Description

Calls methods on the Controller file (= JPF file) in the same directory as the JSP page. If no Controller file is found, an ObjectNotFoundException is thrown and the tag execution fails. Any return value is stored in the {pageContext...} data binding context object under the attribute specified by the resultId attribute.

For example, if you call the hello method with the following <netui-data:callPageFlow> tag...

    <netui-data:callPageFlow
          method="hello"
          resultId="helloMessage"
          />

...the result of the call is stored in the {pageContext...} data binding context under the attribute helloMessage.

The result can be retrieved with the data binding expression {pageContext.helloMessage}

   <netui:label value="{pageContext.helloMessage}"/>

In a scriptlet, the result can be retrieved by calling the getAttribute() method on the javax.servlet.jsp.PageContext object:

    <%= pageContext.getAttribute("helloMessage") %>

Note that only synchronous methods can be called with <netui-data:callPageFlow>. For handling asynchronous methods see the help topic Calling Web Services and Custom Java Controls From A Page Flow

Attributes
failOnError
Required: No  |   Supports runtime evaluation: No  |   Data bindable:

method
Required: Yes  |   Supports runtime evaluation: No  |   Data bindable:

object
Required: No  |   Supports runtime evaluation: Yes  |   Data bindable:

A string or data binding expression that names the class on which to call a method.
resultId
Required: No  |   Supports runtime evaluation: No  |   Data bindable:


 
Example

In the following sample, the <netui-data:callPageFlow> tag calls the sumCartItems method on the Controller file. The <netui:label> tag accesses the result through the {pageContext...} data binding context.

     <netui-data:callPageFlow method="sumCartItems" resultId="cartSum">
          <netui-data:methodParameter value="{pageFlow.cart.lineItemList}"/>
      </netui-data:callPageFlow>
      ...
      <netui:label value="{pageContext.cartSum}"/>