FilterDispatcher is deprecated! - What is the replacement for FilterDispatcher?

Question

How to avoid the following error? I am implementing Spring-Security on Struts2, the application runs perfectly but the following message will be shown on server log.

Answer 1

Since Struts 2.1.3, an addition method call is used in doFilter () method of FilterDispatcher to display the warning message.

showDeprecatedWarning() prints the message on the console. It just a System.out.println().

 public void doFilter(....){
  showDeprecatedWarning();
    ........
 }

 private void showDeprecatedWarning() {
    String msg =
            "\n\n" +
            "***********************************************************************\n" +
            "*                               WARNING!!!                            *\n" +
            "*                                                                     *\n" +
            "* >>> FilterDispatcher <<< is deprecated! Please use the new filters! *\n" +
            "*                                                                     *\n" +
            "*           This can be a source of unpredictable problems!           *\n" +
            "*                                                                     *\n" +
            "*              Please refer to the docs for more details!             *\n" +
            "*            http://struts.apache.org/2.x/docs/webxml.html            *\n" +
            "*                                                                     *\n" +
            "***********************************************************************\n\n";
    System.out.println(msg);
}

But Struts2 recommends to use org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter instead of org.apache.struts2.dispatcher.FilterDispatcher.

web.xml configuration

<filter>
     <filter-name>struts2</filter-name>
     <filter-class>
         org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
     </filter-class>
</filter>

Answer 2

I'd recommend following the link and doing what it says:

<filter>
    <filter-name>struts2</filter-name>

    <filter-class>
        org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
    </filter-class>
</filter>

Answer 3

The FilterDispatcher (org.apache.struts2.dispatcher.FilterDispatcher) is used in the early Struts2 development, and it’s deprecated since Struts 2.1.3.

If you are using Struts version >= 2.1.3, it’s always recommended to upgrade the new filter class – StrutsPrepareAndExecuteFilter (org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter).

for references

FilterDispatcher documentation

StrutsPrepareAndExecuteFilter documentation