nextapp.echoservlet
Class ErrorHandler

java.lang.Object
  nextapp.echoservlet.ErrorHandler

class ErrorHandler

extends java.lang.Object

An application error handler/logger that will notify the user with both a simple HTML page and JavaScript alert.

Field Summary

private static int	errorIdCount Error id counter
private static java.lang.String	HTML_1 The first segment of the "template" used to display the HTML error page.
private static java.lang.String	HTML_2 The second segment of the "template" used to display the HTML error page.
private static java.lang.String	HTML_3 The third segment of the "template" used to display the HTML error page.
private static java.lang.String	HTML_4 The fourth segment of the "template" used to display the HTML error page.
private static java.lang.String	POST_ERROR_TEXT Text that follows the error message
private static java.lang.String	PRE_ERROR_TEXT Text that preceeds the error message

Constructor Summary

private

ErrorHandler() Non-instantiable class.

Method Summary

(package private) static void

process(InstancePeer instancePeer, javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, javax.servlet.http.HttpServlet servlet, java.lang.Exception ex) Renders an error page and shuts down the application.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PRE_ERROR_TEXT

private static final java.lang.String PRE_ERROR_TEXT

Text that preceeds the error message

See Also:

Constant Field Values

POST_ERROR_TEXT

private static final java.lang.String POST_ERROR_TEXT

Text that follows the error message

See Also:

Constant Field Values

errorIdCount

private static int errorIdCount

Error id counter

HTML_1

private static final java.lang.String HTML_1

The first segment of the "template" used to display the HTML error page.

See Also:

Constant Field Values

HTML_2

private static final java.lang.String HTML_2

The second segment of the "template" used to display the HTML error page.

See Also:

Constant Field Values

HTML_3

private static final java.lang.String HTML_3

The third segment of the "template" used to display the HTML error page.

See Also:

Constant Field Values

HTML_4

private static final java.lang.String HTML_4

The fourth segment of the "template" used to display the HTML error page.

See Also:

Constant Field Values

Constructor Detail

ErrorHandler

private ErrorHandler()

Non-instantiable class.

Method Detail

process

static void process(InstancePeer instancePeer,
                    javax.servlet.http.HttpServletRequest request,
                    javax.servlet.http.HttpServletResponse response,
                    javax.servlet.http.HttpServlet servlet,
                    java.lang.Exception ex)
             throws javax.servlet.ServletException,
                    java.io.IOException

Renders an error page and shuts down the application. The application's session will be invalidated, and JavaScript will be executed to close extra browser windows if they have been opened. The error will be logged to the Servlet log file.

Parameters:

request - The HTTP request object provided by the servlet container.

response - The HTTP response object provided by the servlet container.

servlet - A reference to the application's underlying HttpServlet. The servlet is required to access the logging facility.

ex - The fatal exception.

Throws:

javax.servlet.ServletException

java.io.IOException