/*
* The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
* (the "License"). You may not use this work except in compliance with the License, which is
* available at www.apache.org/licenses/LICENSE-2.0
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied, as more fully set forth in the License.
*
* See the NOTICE file distributed with this work for information regarding copyright ownership.
*/
package alluxio;
import alluxio.master.MasterFactory;
import alluxio.worker.WorkerFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.ServiceLoader;
/**
* Utility methods for Alluxio services.
*/
public final class ServiceUtils {
/**
* @return service loader for master factories
*/
public static synchronized ServiceLoader<MasterFactory> getMasterServiceLoader() {
return ServiceLoader.load(MasterFactory.class, MasterFactory.class.getClassLoader());
}
/**
* @return the list of master service names
*/
public static List<String> getMasterServiceNames() {
List<String> masterServiceNames = new ArrayList<>();
for (MasterFactory factory : getMasterServiceLoader()) {
if (factory.isEnabled()) {
masterServiceNames.add(factory.getName());
}
}
return masterServiceNames;
}
/**
* @return service loader for worker factories
*/
public static synchronized ServiceLoader<WorkerFactory> getWorkerServiceLoader() {
return ServiceLoader.load(WorkerFactory.class, WorkerFactory.class.getClassLoader());
}
private ServiceUtils() {} // prevent instantiation
}