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package com.sun.enterprise.universal.glassfish;
import com.sun.enterprise.universal.collections.CollectionUtils;
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 final static void init() {
// forces creation
getProperty("java.lang.separator");
}
/**
* Get the GFSystem Properties
* @return a snapshot copy of the dcurrent Properties
*/
public final static Map<String,String> 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 final static void setProperty(String key, String value)
{
gfsi.get().setProperty(key, value);
}
private static final InheritableThreadLocal<GFSystemImpl> gfsi =
new InheritableThreadLocal<GFSystemImpl>() {
@Override
protected GFSystemImpl initialValue() {
return new GFSystemImpl();
}
};
}