/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.tomcat.unittest;
import java.util.function.IntConsumer;
import java.util.function.Supplier;
/*
* Support class for threaded performance tests.
*/
public class TesterThreadedPerformance {
private final int threadCount;
private final int iterationCount;
private final Supplier<IntConsumer> testInstanceSupplier;
public TesterThreadedPerformance(int threadCount, int iterationCount,
Supplier<IntConsumer> testInstanceSupplier) {
this.threadCount = threadCount;
this.iterationCount = iterationCount;
this.testInstanceSupplier = testInstanceSupplier;
}
public long doTest() throws InterruptedException {
long start = System.nanoTime();
Thread[] threads = new Thread[threadCount];
for (int i = 0; i < threadCount; i++) {
IntConsumer testTarget = testInstanceSupplier.get();
threads[i] = new Thread(
new TesterThreadedPerformanceRunnable(testTarget, iterationCount));
}
for (int i = 0; i < threadCount; i++) {
threads[i].start();
}
for (int i = 0; i < threadCount; i++) {
threads[i].join();
}
return System.nanoTime() - start;
}
private static class TesterThreadedPerformanceRunnable implements Runnable {
private final IntConsumer testTarget;
private final int iterationCount;
TesterThreadedPerformanceRunnable(IntConsumer testTarget, int iterationCount) {
this.testTarget = testTarget;
this.iterationCount = iterationCount;
}
@Override
public void run() {
for (int i = 0; i < iterationCount; i++) {
testTarget.accept(i);
}
}
}
}