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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2008-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
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* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
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* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
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*/
// Portions Copyright [2019] Payara Foundation and/or affiliates
package com.sun.enterprise.universal.glassfish;
import java.util.*;
/**
* A replacement for System Properties
* An InheritableThreadLocal is used to store the "impl". This means that the
* initial thread that uses this class -- and all its sub-threads will get the
* same System Properties.
* Make sure that you don't create it from the main Thread -- otherwise all instances
* will get the same props.
* E.g.
* main thread creates instance1-thread and instance2-thread
* The 2 created threads should each call init() -- but the main thread should not.
* In the usual case where there is just one instance in the JVM -- this class is also
* perfectly usable. Just call any method when you need something.
*
* @author bnevins
*/
public final class GFSystem {
public static final void init() {
// forces creation
getProperty("java.lang.separator");
}
/**
* Get the GFSystem Properties
* @return a snapshot copy of the dcurrent Properties
*/
public static final Map getProperties()
{
return gfsi.get().getProperties();
}
/**
* Get a GF System Property
* @param key the name of the property
* @return the value of the property
*/
public final static String getProperty(String key)
{
return gfsi.get().getProperty(key);
}
/**
* Set a GF System Property, null is acceptable for the name and/or value.
* @param key the name of the property
* @param value the value of the property
*/
public static final void setProperty(String key, String value)
{
gfsi.get().setProperty(key, value);
}
private static final InheritableThreadLocal gfsi =
new InheritableThreadLocal() {
@Override
protected GFSystemImpl initialValue() {
return new GFSystemImpl();
}
};
}