org.hawkular.btm.api.services

Class ServiceResolver

java.lang.Object

org.hawkular.btm.api.services.ServiceResolver

public class ServiceResolver
extends Object

This utility class provides service lookup and management of singletons based on the java ServiceLoader mechanism. This mechanism will be used in situations where other higher level component dependency injection mechanisms are not appropriate (e.g. instrumenting the client JVM).

Author:

gbrown

Constructor Summary

Constructors

Constructor and Description
ServiceResolver()

Method Summary

Modifier and Type	Method and Description
static <T> List<T>	getServices(Class<T> intf) This method returns the list of service implementations that implement the supplied interface.
static <T> CompletableFuture<T>	getSingletonService(Class<T> intf) This method identifies a service implementation that implements the supplied interface, and returns it as a singleton, so that subsequent calls for the same service will get the same instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ServiceResolver

public ServiceResolver()

Method Detail

getSingletonService

public static <T> CompletableFuture<T> getSingletonService(Class<T> intf)

This method identifies a service implementation that implements the supplied interface, and returns it as a singleton, so that subsequent calls for the same service will get the same instance.

Type Parameters:

T - The service interface

Parameters:

intf - The interface

Returns:

The service, or null if not found

getServices

public static <T> List<T> getServices(Class<T> intf)

This method returns the list of service implementations that implement the supplied interface.

Type Parameters:

T - The service interface

Parameters:

intf - The interface

Returns:

The list