Re: [jboss-as7-dev] MSC service names in AS7
On 06/01/2011 03:08 PM, David Bosschaert wrote:
----- Original Message -----
> From: "David M. Lloyd"<david.lloyd(a)redhat.com>
> To: jboss-as7-dev(a)lists.jboss.org
> Sent: Wednesday, 1 June, 2011 9:02:28 PM
> Subject: Re: [jboss-as7-dev] MSC service names in AS7
> On 06/01/2011 02:54 PM, David Bosschaert wrote:
>> Hi all,
>>
>> Just a quick question re service names in AS7. Is there any
>> guidelines on the names you give your AS7 services? When I use a
>> shortlived service, does it matter what name I give it?
>
> All services created by us start with "jboss.". Service names should
> be
> chosen in such a way as to make conflicts impossible. That's about it.
Ok, thanks.
One further question. Let's say my service performs some async action in start() and
when that action is finished I'm not really interested in the service any more. Should
I remove it somehow from the system then?
In other words, a one-time task which is triggered when all its
dependencies start? We don't have a generalized API for this. There
are subtle conceptual issues.
First, using a service will cause its dependencies to automatically
start if they are, say, ON_DEMAND. However if your service then
immediately stops or is removed, the dependency services will stop
again, which is not a useful semantic.
You can use listeners instead, however a listener can only presently be
added to an installed service (i.e. you can't install a listener on a
name in anticipation of a future service).
So the real question is, what problem are you trying to solve here?
Additionally, let's say I have a service that can run more than
once, should I give it a different name every time?
Services can be stopped and started repeatedly, and in fact it is part
of the contract of a service that it must be able to do so.
--
- DML