/*
* Copyright (c) 2002-2012 Alibaba Group Holding Limited.
* All rights reserved.
*
* Licensed 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 com.alibaba.citrus.service.requestcontext.session.idgen;
import static com.alibaba.citrus.generictype.TypeInfoUtil.*;
import static com.alibaba.citrus.util.CollectionUtil.*;
import static org.junit.Assert.*;
import java.util.Set;
import com.alibaba.citrus.service.requestcontext.session.SessionIDGenerator;
import org.junit.Before;
import org.junit.Test;
import org.springframework.beans.factory.InitializingBean;
public abstract class AbstractIDGeneratorTests<G extends SessionIDGenerator> {
private final int loop = 10000;
private final int concurrency = 20;
protected G idgen;
@Before
@SuppressWarnings("unchecked")
public final void initIdgen() throws Exception {
idgen = (G) resolveParameter(getClass(), AbstractIDGeneratorTests.class, 0).getRawType().newInstance();
if (idgen instanceof InitializingBean) {
((InitializingBean) idgen).afterPropertiesSet();
}
}
@Test
public synchronized void performance() throws InterruptedException {
final String[][] results = new String[concurrency][];
Thread[] threads = new Thread[concurrency];
for (int i = 0; i < concurrency; i++) {
final String[] result = new String[loop];
results[i] = result;
threads[i] = new Thread(new Runnable() {
public void run() {
for (int i = 0; i < loop; i++) {
result[i] = idgen.generateSessionID();
}
}
}, "t-" + (i + 1));
}
long start = System.currentTimeMillis();
for (Thread thread : threads) {
thread.start();
}
for (Thread thread : threads) {
thread.join();
}
long duration = System.currentTimeMillis() - start;
System.out.printf("%s: requests=%d, concurrency=%d%n", idgen.getClass().getSimpleName(), concurrency * loop,
concurrency);
System.out.printf(" Total time: %,d ms.%n", duration);
System.out.printf("Average time: %,2.2f \u03BCs.%n", (double) duration / concurrency / loop * 1000);
// 检查重复
Set<String> allIDs = createHashSet();
for (String[] result : results) {
for (String id : result) {
assertNotNull(id);
assertTrue(id, !id.contains("+") && !id.contains("/") && !id.contains("="));
allIDs.add(id);
}
}
assertEquals(concurrency * loop, allIDs.size());
}
}