[daisy] [JIRA] Created: (DSY-431) Daisy wiki wrapper script should check/wait 'smart' for the repository to run!

[Bruno Dumon]

On Tue, 2007-03-20 at 08:32 +0100, Andreas Deininger wrote:
> 2007/3/19, Steven Noels <stevenn at outerthought.org>:
> > On 19 Mar 2007, at 23:01, Marc Portier (JIRA) wrote:
> >
> > > wait_for_server_start () {
> > >   port=$1
> > >   counter=0
> > >   serverstatus=`netstat -l  | grep -e "^tcp.*:${port}"`
> >
> > That command is pretty Linux-specific, I'm afraid.
> 
> Windows has yet another version (coming with the MSYS Tools):
> 
> NETSTAT [-a] [-b] [-e] [-n] [-o] [-p Protokoll] [-r] [-s] [-v] [Intervall]
> 
> Inside my windows installer, I'm facing exactly the same problem.
> Here, I'm using a utility called T4ePingPort which is used to check
> whether we can successfully to the daisy repository and wiki. It is
> taken from the Tools4ever Command Line Utilities Bundle, which can be
> obtained via:
> http://www.tools4ever.com/products/free/command/.
>

Maybe something can be written in Java, so that it would work on any
platform.

> I'm wondering whether we shouldn't go the other way and tackling that
> issue from the wiki side (besides altering the startup scripts, which
> could be  also useful). There was an issue on that (DSY 317) already
> which was discarded.
> Would be nice if instead on cocoon error page talking about an
> initialization error there would be a button "Reconnect" that allows
> you to try to connect to the repository again. Now idea how difficult
> it would be to implement such a behaviour.

A "Reconnect" button seems pretty strange to me. Could you imagine
surfing to e.g. google.com and seeing such a button there? :-)

A possible solution would be to do the initialization in a background
thread, which could retry to connect until it succeeds. This way,
initialization of cocoon will not fail, a nicer error can be shown if
the connnection was not yet established, and it copes with the wiki
being up earlier than the repo.

-- 
Bruno Dumon                             http://outerthought.org/
Outerthought - Open Source, Java & XML Competence Support Center
bruno at outerthought.org                          bruno at apache.org