Package org.opennms.features.topology.api.support

Interface ServiceLocator

All Known Implementing Classes:

BundleContextServiceLocator, SimpleServiceLocator

public interface ServiceLocator

Helper interface to lookup all available MetaTopologyProviders. This should make tests easier.

Method Summary

Modifier and Type	Method	Description
<T> List<T>	findServices(Class<T> clazz, String query)	Find services of class clazz registered in the OSGI Service Registry.
<T> T	findSingleService(Class<T> clazz, java.util.function.Predicate<T> postFilter, String bundleContextFilter)	Finds a service registered with the OSGI Service Registry of type clazz.

Method Detail

findSingleService

<T> T findSingleService(Class<T> clazz,
                        java.util.function.Predicate<T> postFilter,
                        String bundleContextFilter)

Finds a service registered with the OSGI Service Registry of type clazz. If a bundleContextFilter is provided, it is used to query for the service, e.g. "(operation.label=My Label*)". In addition each clazz of type T found in the OSGI Service Registry must afterwards pass the provided postFilter. If multiple services are found, only the first one is returned.

Returns:

A object of type clazz or null.

findServices

<T> List<T> findServices(Class<T> clazz,
                         String query)

Find services of class clazz registered in the OSGI Service Registry. The optional filter criteria query is used.

Returns:

All found services registered in the OSGI Service Registry of type clazz.