/**
* Time a multi-threaded access to a cache.
*
* @return the timing stopwatch
*/
private <V> StopWatch timeMultiThreaded(
String id, final Map<Integer, V> map, ValueFactory<V> factory) throws InterruptedException {
StopWatch stopWatch = new StopWatch(id);
for (int i = 0; i < 500; i++) {
map.put(i, factory.newValue(i));
}
Thread[] threads = new Thread[30];
stopWatch.start("Running threads");
for (int threadIndex = 0; threadIndex < threads.length; threadIndex++) {
threads[threadIndex] =
new Thread("Cache access thread " + threadIndex) {
@Override
public void run() {
for (int j = 0; j < 1000; j++) {
for (int i = 0; i < 1000; i++) {
map.get(i);
}
}
}
};
}
for (Thread thread : threads) {
thread.start();
}
for (Thread thread : threads) {
if (thread.isAlive()) {
thread.join(2000);
}
}
stopWatch.stop();
return stopWatch;
}
