2 * Copyright © 2016-2018 European Support Limited
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.onap.config.api;
19 import java.util.Iterator;
20 import java.util.ServiceConfigurationError;
21 import java.util.ServiceLoader;
24 * Loads a Java SPI binding for the configuration service.
29 class ConfigurationLoader {
31 private ConfigurationLoader() {
34 static Configuration load() {
36 ServiceLoader<ConfigurationManager> loader = ServiceLoader.load(ConfigurationManager.class);
37 Iterator<ConfigurationManager> configManagers = loader.iterator();
38 while (configManagers.hasNext()) {
40 return configManagers.next();
41 } catch (ServiceConfigurationError e) {
42 // this provider loading has failed, let's try next one
46 throw new IllegalStateException("No binding found for configuration service");