Re: [Wrapper-user] Sending parameters when starting service

[Christian M. <chr...@ta...>]

Hello Patrick,

thank you for your mail.

I can understand your request very well, but unfortunately it's currently
not possible to pass any additional parameters to the service when starting
from the command line.

Actually this is not a completely trivial task, since the command line of
the service is being set during the installation.
When you start the Wrapper in order to start a service, the Wrapper
interacts with the Windows Service Control Manager and tells it to start
the Service.

If you want to pass an additional parameter to the JVM during installation
via the command line, then this can be done for instance rather easily
using the '--' parameter:
bin\wrapper.exe -i ..\conf\wrapper.conf -- myParam1 myParam2 [...]
Everything preceding the '--' will be passed through the Wrapper to the
Java Application.

Now every time the service is being started, the parameters specified
during installation are passed to your application.

If you now want to alter those parameters each time you start the Service,
you actually would have to update the Service each time.
This can be done similar to the procedure as above, using the parameter
'-u' (update)
bin\wrapper.exe -u ..\conf\wrapper.conf -- myNewParam1 myNewParam2 [...]
and then start the service, e.g.:
bin\wrapper.exe -t ..\conf\wrapper.conf

We could probably add a new parameter to update the service each time it
starts a service (and parameters are being passed through)
However, please note that updating a service requires additional security
permissions than only starting (SERVICE_QUERY_CONFIG and
SERVICE_CHANGE_CONFIG privileges are additionally required).

Another way of implementing something similar would be to define a
"parameter file".
All additional parameters would be written into that file, e.g.:
myPara1 myPara2 [...]
and in the conf file something like this would be specified:
wrapper.java.app.parameterfile=myParameterFile.txt

This way, the same functionally would become available on non-Windows
systems as well, rather than implementing something very platform
specific...

Please let me know what you think about my suggestions.

Thank you,

Christian Mueller
Tanuki Software, Ltd.


On Fri, Jul 6, 2012 at 1:01 PM, Patrick Burghardt <PBu...@ec...>wrote:

>  We have parameters for our java application set up in our config files
> and those are working fine.  But we want to be able to send an additional
> parameter when we start the service.  Can we send a parameter from the
> command line when starting a service?  And how do we recognize that this is
> a parameter that we want to send on to the java application?****
>
> ** **
>
> That is, I want to be able to start the service with a command such as “sc
> start service1 parm1=potatoes” and have “potatoes” sent as a specific
> argument to my java application.****
>
> ** **
>
> Thanks.****
>
> ** **
>   Patrick Burghardt Software Engineer III
>
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