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.
