MyPage.java

public class MyPage {
   @Property
   private String value1;

   @Property
   private String value2;

   public Invokable<String> getInvokable1() {
      return new Invokable<String>() {
         public String invoke() {
            Thread.sleep(5 * 1000);
            return "name1";
         }
      }
   }
   public Invokable<String> getInvokable2() {
      return new Invokable<String>() {
         public String invoke() {
            Thread.sleep(5 * 1000);
            return "name2";
         }
      }
   }
}

MyPage.tml

<t:parallelContainer>
   <t:parallel invokable="invokable1" binding="value1">
      Hello ${value1}
   </t:parallel>
   <t:parallel invokable="invokable2" binding="value2">
      Hello ${value2}
   </t:parallel>
</t:parallelContainer>