The cacheChanged() method of ServiceCacheListener is called each time a change in registrations is noticed. So, you can just respond to that.
> And, out of curiosity, what happens if the service B has been registered > before the service A attaches his listener? Your listener will not get any notifications. However, the ServiceCache always has a view of the registered instances so you can iterate over it to get the info you want. -Jordan > On Nov 20, 2015, at 2:58 PM, Fabrizio Cucci <[email protected]> wrote: > > Hello everyone, > > I'm currently working on a Java project that requires some service discovery > and service coordination capabilities and I was thinking about using Curator > for those purposes. > > One of the main feature I would need is to let one service be notified as > soon as another service becomes available. E.g. the service A starts and at a > certain point it requires some services B. Instead of repeatedly calling the > getInstance method of the ServiceProvider abstraction at regular intervals > until the service B becomes available (polling-like policy), it would be nice > to get notified as soon as the services B becomes available (i.e. at least > one instance has been registered). > > Is it something feasible using something like the ServiceCacheListener ? > If yes, would it be the best way to go? > > And, out of curiosity, what happens if the service B has been registered > before the service A attaches his listener? Does the service A get > immediately notified because the service B is immediately available? > > Thanks in advance for your help and suggestions, > Fabrizio
