Exception handling didnot et stack trace

[viren.vagarwal.q3tech.com]

Hi I am using seam with jsf.
My problem is exception handling.
I have added my exception tags in pages.xml.

<exception class="java.lang.Exception">
        <redirect view-id="/error.xhtml">
            <message severity="error">#{messages.unexpected_error</message>
        </redirect>
  </exception>

When ever exception occurs it is redirected to error page that works fine.
But i want to capture when ever an exception occurs . I am not concern with the type and where it occurs i need to get print stack trace of the exception when ever it occurs.

For this i created a class




`@Name("errorHandler")
public class ErrorHandlerImpl extends ExceptionHandler {
        
       
        private String stackTrace;
       
        public String getStackTrace() {
               
                return stackTrace;
        }

        public void setStackTrace(String stackTrace) {
                this.stackTrace = stackTrace;
        }

        @Override
        public void handle(Exception e) throws Exception {
                stackTrace = "jhgvjkhkjhbjkhkj";
               
                e.printStackTrace();
               
        }

        @Override
        public boolean isHandler(Exception e) {
                return true;
        }
}`


I dont know how can i call handle method to get the exception. I am new to seam so tell me how i use this class.
My error.xhtml page calls stackTrace like this.

<h1>Error</h1>
        <h:outputText value="#{errorHandler.stackTrace}"></h:outputText>
                <br></br>
        <h:messages id="errorMessage" styleClass="message"/>
Please help me how can i get stack trace of the exception.
Thanks & Regards