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package com.vladium.utils.timing;
// ----------------------------------------------------------------------------
/**
* This non-instantiable non-extendible class acts as a Factory for {@link ITimer}
* implementations.
*
* @author (C) <a href="mailto:vroubtsov@illinoisalumni.org">Vlad Roubtsov</a>, 2002
*/
public abstract class TimerFactory
{
// public: ................................................................
private static final String HRTIMER_LIB = "hrtlib";
/**
* Creates a new instance of {@link ITimer} which is returned in 'ready'
* state. If the JNI-based/high-resolution implementation is not available
* this will return an instance of <code>JavaSystemTimer</code>, so this
* method is guaranteed not to fail.
*
* @return ITimer a new timer instance in 'ready' state [never null]
*/
public static void initialize(String path) {
UnsatisfiedLinkError exception = null;
try {
System.loadLibrary (HRTIMER_LIB);
} catch (UnsatisfiedLinkError e) {
if(path != null) {
try {
System.load(path);
} catch (UnsatisfiedLinkError ex) {
exception = ex;
}
} else {
exception = e;
}
}
if(exception != null) {
System.out.println ("native lib '" + HRTIMER_LIB
+ "' not found in 'java.library.path': "
+ System.getProperty ("java.library.path")
+path==null?"":(" or in "+path));
throw exception; // re-throw
}
}
public static ITimer newTimer ()
{
// try
// {
return new HRTimer ();
// }
// catch (Throwable t)
// {
// return new JavaSystemTimer ();
// }
}
// protected: .............................................................
// package: ...............................................................
// private: ...............................................................
private TimerFactory () {} // prevent subclassing
} // end of class
// ----------------------------------------------------------------------------
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