Hi Toni, Thanks a lot, It looks like the ServiceHooks are pretty interesting idea. I'd spend sometime on it and them report it back here.
:) Leo On Mon, Mar 29, 2010 at 1:41 AM, Toni Menzel <[email protected]> wrote: > After a very quick read of your mail, a quick try: > ServiceHooks (look in the OSGi Core Spec. 4.2) may be something of interest > for you. > Toni > > On Mon, Mar 29, 2010 at 10:00 AM, Leon668 <[email protected]> wrote: > > > Hi all, > > > > I am trying to build a mechanism that is similar to the "Mutex" in OSGI. > > Guarantee only one service is only used by one user(service) at one > time. > > (well, we could expand this to Semaphore) > > > > I understand OSGI can know which services are referencing to a specific > > service. But it looks like we cannot get which services are using a > > specific > > service. (the services must be actually running) > > > > > > *suppose*. > > > > Service A is running and it is invoking Service B. > > > > Then if Service C wants to invoke Service B, it needs to wait until > > Service > > A releases Service B. > > > > > > > > I am trying to build up a management service to record the current > service > > usage information. ie. whenever one service wants to use the other > service, > > it always need to check a management service and see if the other service > > it > > is going to use is available or not. > > > > I did this by offering a Hashmap in a third party service. The key is > the > > name of the service(maybe i should pick another property as the name), > and > > value is the reference to the current service object. Each service checks > > this map before it invokes any service. > > > > I dont know if I am doing the right thing. Maybe OSGI already has this > > feature? > > > > Thanks, > > > > Leo. > > > > > > -- > Toni Menzel > Independent Software Developer > Professional Profile: http://okidokiteam.com > [email protected] > http://www.ops4j.org - New Energy for OSS Communities - Open > Participation Software. >
