How to solve common web application problems using Cocoon
In this article I will explain how to solve certain problems and implement various things commonly seen in web application development.
Eventually these may turn into full-fledged HOWTOs or Tutorials. – TonyCollen
Problem: You wish to display a "please wait" page while a long-running process or query takes place.
Solution: Use the Flowscript to periodically check to see if a process has finished.
Example:
function main() { var done = false; while (!done) { cocoon.sendPageAndWait("wait", {}); done = EnterpriseSystem.checkQuery(); } cocoon.sendPage("done", {}); }
Discussion: Using the Flowscript, keep sending the user to a page which will automatically redirect back into continuation. Here, EnterpriseSystem.checkQuery() is not actually defined, but you would write your own logic (probably in a Java class) to see if the user's query has finished. Implementation details are left as an exercise for the reader.
Problem: You wish to verify that someone exists by sending them a unique URL over email.
Solution: After the initial registration page, send them a URL containing their Continuation ID to the email address that they specified.
Example: (TODO)