com.aspectran.core.util.SystemUtils Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2019 The Aspectran Project
*
* 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.
*/
package com.aspectran.core.util;
import com.aspectran.core.util.logging.Log;
import com.aspectran.core.util.logging.LogFactory;
import java.security.AccessControlException;
/**
* Helpers for java.lang.System.
*/
public class SystemUtils {
private static final Log log = LogFactory.getLog(SystemUtils.class);
/**
* Gets a System property, defaulting to null if the property
* cannot be read.
*
* If a SecurityException is caught, the return value is null.
*
* @param name the system property name
* @return the system property value or null if a security problem occurs
*/
public static String getProperty(String name) {
try {
return System.getProperty(name);
} catch (AccessControlException ex) {
if (log.isDebugEnabled()) {
log.debug(String.format(
"Caught AccessControlException when accessing system property [%s]; " +
"its value will be returned [null]. Reason: %s",
name, ex.getMessage()));
}
}
return null;
}
public static String getProperty(String name, String defVal) {
String val = getProperty(name);
return (val != null ? val : defVal);
}
}