Re: ServletContextListener: how to suspend web app on error
A simple generic way is to use a filter which executes on all requests.
If the ServletContextListener has an error - it can set a variable in the
application context.
Then the filter can check for the existence of that variables. Then forward
to an error page.
For example ...
doFilter( ... ) {
if (null!=servletContext.getAttribute(startupError)) {
servletContext.getRequestDispatcher(/WEB-INF/error.jsp)
.forward(request, response);
} else {
chain.doFilter(...);
}
}
-Tim
Justin Ruthenbeck wrote:
Seems like a simple question, can't seem to find the answer...
If an error occurs in the #contextInitialized() method of an object that
implements ServletContextListener, how can I suspend the web application
so that it is unavailable for use by clients?
Specifically, I have a ServletContextListener that needs to be run at
application startup. If any one of many errors occur, I want to notify
the appropriate people (this I can do) and make the entire webapp
unavailable (this I can't figure out).
Any help is appreciated. I have a feeling this is obvious and I'm just
missing something.
-
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RE: ServletContextListener: how to suspend web app on error
Howdy, Throw any RuntimeException from the method, and the server will mark the context as unavailable -- all requests will return HTTP code 503. Tim's filter approach is fine too. Yoav Shapira Millennium ChemInformatics -Original Message- From: Justin Ruthenbeck [mailto:[EMAIL PROTECTED] Sent: Thursday, January 08, 2004 7:36 PM To: Tomcat User List Subject: ServletContextListener: how to suspend web app on error Seems like a simple question, can't seem to find the answer... If an error occurs in the #contextInitialized() method of an object that implements ServletContextListener, how can I suspend the web application so that it is unavailable for use by clients? Specifically, I have a ServletContextListener that needs to be run at application startup. If any one of many errors occur, I want to notify the appropriate people (this I can do) and make the entire webapp unavailable (this I can't figure out). Any help is appreciated. I have a feeling this is obvious and I'm just missing something. Cheers, justin __ Justin Ruthenbeck Software Engineer, NextEngine Inc. justinr - AT - nextengine DOT com Confidential. See: http://www.nextengine.com/confidentiality.php __ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] This e-mail, including any attachments, is a confidential business communication, and may contain information that is confidential, proprietary and/or privileged. This e-mail is intended only for the individual(s) to whom it is addressed, and may not be saved, copied, printed, disclosed or used by anyone else. If you are not the(an) intended recipient, please immediately delete this e-mail from your computer system and notify the sender. Thank you. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
ServletContextListener: how to suspend web app on error
Seems like a simple question, can't seem to find the answer... If an error occurs in the #contextInitialized() method of an object that implements ServletContextListener, how can I suspend the web application so that it is unavailable for use by clients? Specifically, I have a ServletContextListener that needs to be run at application startup. If any one of many errors occur, I want to notify the appropriate people (this I can do) and make the entire webapp unavailable (this I can't figure out). Any help is appreciated. I have a feeling this is obvious and I'm just missing something. Cheers, justin __ Justin Ruthenbeck Software Engineer, NextEngine Inc. justinr - AT - nextengine DOT com Confidential. See: http://www.nextengine.com/confidentiality.php __ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
