I will try this method. Thank you very much!

2013/4/8 Nate Coraor <n...@bx.psu.edu>

> On Apr 4, 2013, at 9:41 AM, BingXin Lu wrote:
>
> > Dear all,
> >
> > I  have added a tool in galaxy. After clicking 'Execute',  this tool
> will query an external database for some information to ensure that there
> are no conflict records in the database. So sometimes an alert message
> should be sent to user if there are wrong records in the database. But I
> have not found out an efficient way to implement this in galaxy.  I am
> wondering if it is possible to give some warning message to users when
> running a tool in galaxy and how to do it if it is feasible.
> >
> > I implemented the tool with an xml file and a python file. I am
> wondering calling javascript from the python code to give user error
> information. But it seems infeasible and I do not know where to start.
>
> Hi Bingxin,
>
> The simplest method would be to output the messages from your tool.  For a
> warning message that does not cause the tool to fail, write the messages to
> stdout.  If the warning conditions should cause the tool to fail, write the
> messages to stderr.
>
> --nate
>
> >
> > Do you have any ideas?
> >
> > Thank you very much!
> >
> > Best regards,
> > --Bingxin
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