Differences

This shows you the differences between two versions of the page.

--- proj1 [2010/10/09 22:35] – roumani
+++ proj1 [2010/10/09 22:45] (current) – roumani
@@ Line 16: / Line 16: @@
 The same variations listed in Project 0 apply as-is to this project. In addition, the following enhancements over our reference implementation (posted as ''Proj1B.war'') are to be explored:
-  * Persist the webapp data when the controller is destroyed and load it when it starts. Be careful not to mix concerns; specifically: saving data is the concern of the model; the name of the file is the concern of the end-user; the path leading to the file is environmental and is therefore the concern of the controller.
+  * Persist the webapp data when the controller is destroyed and load it when it starts.
+  * When you implement the above data persistence, pay attention to concurrency. In addition, avoid mixing concerns. Specifically, saving data is the concern of the model; the name of the file is the concern of the end-user; the path leading to the file is environmental and is therefore the concern of the controller.
   * Migrate messages (such as //Cannot be Blank//) from the controller to the view.
   * Make one error message appear in red and the other in blue.
-  * Reset the user's count if the user remained idle for 1 minute, i.e. even if the session has not expired.
+  * Reset the user's count if the user remained idle for 1 minute. Do this even if the session has not expired yet.
+  * Send an error message if the used URL includes the string "York" (case insensitive), e.g. /york.do. Ideally, set some unused HTTP error status code and have web.xml auto serve an error page (see the <error-page> tag in web.xml).
-  * Send an error message if the used URL includes the string "York" (case insensitive), e.g. /york.do. Ideally, set some unuser HTTP error status code and have web.xml auto serve an error page (see the <error-page> tag in web.xml).
+  * Deploy your webapp on red. To that end, install tomcat (via the ''tomcat_install'' command) and then start it via ''tomcat_start''. Add ''web.xml'' to your webapp (see posted sample and instructions) and comment out the annotation import line. Export your webapp to a war and put it in the ''webapps'' directory. If you need to make (minor) changes in red, edit the source files and compile them using ''tomcat_compile''. Alternatively, use the ''eclipseEE' command to launch eclipse on red.
-  * Deploy your webapp on red. To that end, install tomcat (via the ''tomcat_install'' command and then start it via ''tomcat_start''. Add ''web.xml'' to your webapp (see posted sample and instructions) and comment out the annotation import line. Export your webapp to a war and put it in the ''webapps'' directory. If you need to make (minor) changes in red, edit the source files and compile them using ''tomcat_compile''. Alternatively, use the ''eclipseEE' command to launch eclipse on red.
 The following two variations require filters and listeners:
   * If a client managed to enter over five countries within a session, flag it as a "Power User" and post its IP at the top of each served page.
   * Inject a new validation rule: //"countries less than three characters are not allowed during lunch hour"// :-D