diff options
Diffstat (limited to 'common/src/main/java/org/openecomp/mso/client/dmaap/DmaapPropertiesLoader.java')
-rw-r--r-- | common/src/main/java/org/openecomp/mso/client/dmaap/DmaapPropertiesLoader.java | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/common/src/main/java/org/openecomp/mso/client/dmaap/DmaapPropertiesLoader.java b/common/src/main/java/org/openecomp/mso/client/dmaap/DmaapPropertiesLoader.java new file mode 100644 index 0000000000..3c861991f6 --- /dev/null +++ b/common/src/main/java/org/openecomp/mso/client/dmaap/DmaapPropertiesLoader.java @@ -0,0 +1,62 @@ +/*- + * ============LICENSE_START======================================================= + * ONAP - SO + * ================================================================================ + * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved. + * ================================================================================ + * Licensed 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. + * ============LICENSE_END========================================================= + */ + +package org.openecomp.mso.client.dmaap; + +import java.util.ServiceLoader; + +public class DmaapPropertiesLoader { + + private final ServiceLoader<DmaapProperties> services; + private DmaapPropertiesLoader() { + services = ServiceLoader.load(DmaapProperties.class); + } + + private static class Helper { + private static final DmaapPropertiesLoader INSTANCE = new DmaapPropertiesLoader(); + } + + public static DmaapPropertiesLoader getInstance() { + return Helper.INSTANCE; + } + public DmaapProperties getImpl() { + return this.getImpl(false); + } + public DmaapProperties getNewImpl() { + return this.getImpl(true); + } + private DmaapProperties getImpl(boolean forceNewInstance) { + for (DmaapProperties service : services) { + if (forceNewInstance) { + try { + return service.getClass().newInstance(); + } catch (InstantiationException | IllegalAccessException e) { + /* all spi implementations must provide a public + * no argument constructor + */ + } + } else { + return service; + } + } + + return null; + } +} |