2 * ================================================================================
3 * Copyright (c) 2018 AT&T Intellectual Property. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 * ============LICENSE_END=========================================================
20 package org.onap.dcae.utils.eelf.logger.logback.resolver;
22 import java.util.List;
24 import java.util.Properties;
27 * Resolve System Properties passed in by -DpropertyName=propertyValue when invoking
28 * via java command line arguments
30 * @author Rajiv Singla
32 public class SystemPropertyResolver implements PropertyResolver {
34 private static final long serialVersionUID = 1L;
37 public String resolve(final List<String> propertyNames) {
39 // Get all system Properties
40 final Properties systemProperties = System.getProperties();
42 for (Map.Entry<Object, Object> systemEntries : systemProperties.entrySet()) {
44 if (systemEntries.getKey() instanceof String) {
45 final String systemKey = (String) systemEntries.getKey();
47 // if system properties contain any of the property names - ignoring case then return its value
48 for (String propertyName : propertyNames) {
49 if (propertyName.equalsIgnoreCase(systemKey)) {
50 return (String) systemEntries.getValue();