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

[Leif M. <le...@ta...>]

Barry,
As a follow up.  This sparked an idea.  So the next release 3.3.0
will now allow you to execute a command like the following to
send a control code to a running service.

bin\wrapper.exe -l=128 ..\conf\wrapper.conf
bin\wrapper.exe --controlcode=128 ..\conf\wrapper.conf

Cheers,
Leif

Leif Mortenson 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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