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/*
* ================================================================================
* Copyright (c) 2018 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.onap.dcae.utils.eelf.logger.logback.resolver;
import java.util.List;
/**
* Looks up Property values inside HOST environment variables
*
* @author Rajiv Singla
*/
public class EnvironmentPropertyResolver implements PropertyResolver {
private static final long serialVersionUID = 1L;
@Override
public String resolve(final List<String> propertyNames) {
// check if system environment variables have property names set
for (final String propertyName : propertyNames) {
final String propertyValue = System.getenv(propertyName);
if (propertyValue != null) {
return propertyValue;
}
}
return null;
}
}
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