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From "Michael Lipp (JIRA)" <jetspeed-...@portals.apache.org>
Subject [jira] Updated: (JS2-341) Add State to Jetspeed Engine for Error Conditions
Date Sun, 30 Oct 2005 19:31:14 GMT
     [ http://issues.apache.org/jira/browse/JS2-341?page=all ]

Michael Lipp updated JS2-341:

    Fix Version: 2.0-FINAL
                     (was: 2.0-M4)

> Add State to Jetspeed Engine for Error Conditions
> -------------------------------------------------
>          Key: JS2-341
>          URL: http://issues.apache.org/jira/browse/JS2-341
>      Project: Jetspeed 2
>         Type: New Feature
>   Components: Components Core
>     Versions: 2.0-M4, 2.0-FINAL
>     Reporter: David Sean Taylor
>     Assignee: David Sean Taylor
>      Fix For: 2.0-FINAL

> This feature addresses a 'user experience' problem: displaying stack traces to the end
user. For example, If I change my database connection to a bad setting, and then try to hit
the portal, I get this in my browser:
> javax.servlet.ServletException: Failed to initalize jetspeed. org.apache.jetspeed.exception.JetspeedException:
Unable to create Engine
>     org.apache.jetspeed.engine.JetspeedServlet.doGet(JetspeedServlet.java:206)
>     javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
>     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
> Ugly.
> I propose that the Jetspeed engine always completes initialization, even  on error conditions.
The engine will have 'state' attribute to determine if the engine is running or in
> engine.getState()
> returning states such as RUNNING, INITIALIZING, DOWN, ERROR
> Then a valve can check the engine state, and redirect to servlet pages based on the state,
or pass thru on the RUNNING state.
> This leads to an interesting challenge: what if the database comes up?
> Should we just restart the app server?
> Thats certainly the easiest solution.
> A retry thread would be another solution

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