org.springframework.boot.system.SystemProperties Maven / Gradle / Ivy
/*
* Copyright 2012-2018 the original author or authors.
*
* 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
*
* https://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.
*/
package org.springframework.boot.system;
/**
* Access to system properties.
*
* @author Phillip Webb
* @since 2.0.0
*/
public final class SystemProperties {
private SystemProperties() {
}
public static String get(String... properties) {
for (String property : properties) {
try {
String override = System.getProperty(property);
override = (override != null) ? override : System.getenv(property);
if (override != null) {
return override;
}
}
catch (Throwable ex) {
System.err.println(
"Could not resolve '" + property + "' as system property: " + ex);
}
}
return null;
}
}