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