Re: [Wrapper-user] communicate to a wrapped service

[Barry A. <tit...@gm...>]

Thanks for the info Leif. I think this is what I am looking for.

Would a normal User be able to communicate with a service running under
Admin? I know that a normal User cannot stop/start/pause a service so I
would think it's also a problem to communicate any special event.

thanks,

-B

On Dec 21, 2007 12:35 AM, Leif Mortenson <le...@ta...> wrote:

> Barry,
>    It depends on exactly what it is that you want to trigger.
> Is it a life cycle  action of the Wrapper to to start a piece of
> arbitrary code in your server.
>
>    I assume the later.
>
> 1)  The Wrapper allows you to capture and react to user defined
> service control codes by registering a WrapperEventListener
> using the following method call:
> WrapperManager.addWrapperEventListener(l,
> WrapperEventListener.EVENT_FLAG_SERVICE);
>    Your listener will then receive WrapperServiceControlEvents
> whenever your service receives any control code, including user
> codes.
>   The drawback here is with the ability to easily send those
> custom codes.  Do you know of a way to do it from the command
> prompt?
>
> 2) The way I have done it in the past is to use the WrapperActionServer
> class.  This creates a very simple telnet server which receives one
> character commands and then immediately closes the connections.
> It comes with a number of predefined commands, but you can also
> register your own using the registerAction method which takes the
> trigger character and a Runnable instance.
> A sample code fragment can be found in the javadocs for
> WrapperActionServer.
>
>    This solution works nicely as you can control it from anywhere
> by simply using a telnet client.  The drawback is that it is not very
> secure as currently implemented.   That could be resolved by adding
> Passwords, IP masks etc, but it is not in there at the moment.
>
>    See the javadocs for documentation on all of the above:
> http://wrapper.tanukisoftware.org/doc/english/javadocs.html
>
> Cheers,
> Leif
>
> Barry Andrews wrote:
> > Hi All,
> >
> > I am in the process of evaluating Java Service Wrapper for Windows and I
> > am wondering if there is a built in way to communicate to a wrapped
> > service?
> >
> > I have some code that I need to run as a Windows service and I need to
> > be able to communicate to it from another process and tell it to run. On
> > Windows you have you have the ServiceBase.OnCustomCommand listener.
> >
> > I have thought about different ways to communicate this event to the
> > service. One way is programmatically pausing the service, ( "net pause
> > <service name>" ) and continuing it when I need it to run. The problem
> > with this is it needs to work for someone logged in as a regular "User",
> > not just an admin. The service would have admin privileges, but the
> > program may only have User privileges.
> >
> > I also thought about communicating via ports, but I didn't know if there
> > was some communication functionality already built in that I was just
> > overlooking? Any thoughts on this?
> >
> > Many thanks to you all.
> >
> > -B
> >
> >
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