2 * ============LICENSE_START=======================================================
4 * ================================================================================
5 * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ============LICENSE_END=========================================================
21 package org.openecomp.mso.client.dmaap;
23 import java.util.ServiceLoader;
25 public class DmaapPropertiesLoader {
27 private final ServiceLoader<DmaapProperties> services;
28 private DmaapPropertiesLoader() {
29 services = ServiceLoader.load(DmaapProperties.class);
32 private static class Helper {
33 private static final DmaapPropertiesLoader INSTANCE = new DmaapPropertiesLoader();
36 public static DmaapPropertiesLoader getInstance() {
37 return Helper.INSTANCE;
39 public DmaapProperties getImpl() {
40 return this.getImpl(false);
42 public DmaapProperties getNewImpl() {
43 return this.getImpl(true);
45 private DmaapProperties getImpl(boolean forceNewInstance) {
46 for (DmaapProperties service : services) {
47 if (forceNewInstance) {
49 return service.getClass().newInstance();
50 } catch (InstantiationException | IllegalAccessException e) {
51 /* all spi implementations must provide a public
52 * no argument constructor