org.dromara.hmily.common.utils.ServiceBootstrap Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.dromara.hmily.common.utils;
import java.util.Iterator;
import java.util.ServiceLoader;
/**
* ServiceBootstrap.
*
* @author xiaoyu
*/
public class ServiceBootstrap {
/**
* Load first s.
*
* @param the type parameter
* @param clazz the clazz
* @return the s
*/
public static S loadFirst(final Class clazz) {
final ServiceLoader loader = loadAll(clazz);
final Iterator iterator = loader.iterator();
if (!iterator.hasNext()) {
throw new IllegalStateException(String.format(
"No implementation defined in /META-INF/services/%s, please check whether the file exists and has the right implementation class!",
clazz.getName()));
}
return iterator.next();
}
/**
* Load all service loader.
*
* @param the type parameter
* @param clazz the clazz
* @return the service loader
*/
public static ServiceLoader loadAll(final Class clazz) {
return ServiceLoader.load(clazz);
}
}