In OSGi using a publisher/subscriber design can be somewhat more complicated that traditional Java environments:
public class SomeBundleActivator implements BundleActivator {
private SomeService service = …
private ServiceRegistration registration;
public void start(BundleContext context) {
registration = context.registerService(SomeService.class.getName(), service, null);
}
…
}
public class AnotherBundleActivator implements BundleActivator {
private [...]
Posted in Java | Also tagged patterns, registry, whiteboard |
The Service Locator pattern is a well-established mechanism for accessing local and remote services in a consistent manner:
public interface ServiceLocator {
<T> T findService(String serviceName) throws ServiceNotAvailableException;
}
Using a structured service name interface we can improve uniformity and reduce the potential for typos:
public enum ServiceName {
SomeService("SomeService");
private final String filter;
[...]
Posted in Java | Also tagged patterns, service locator |
