/*
* Copyright 1999-2011 Alibaba Group Holding Ltd.
*
* 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.druid.pool;
import java.lang.management.ManagementFactory;
import java.sql.Connection;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.CyclicBarrier;
import java.util.concurrent.atomic.AtomicInteger;
import javax.management.ObjectName;
import org.junit.Assert;
import junit.framework.TestCase;
import com.alibaba.druid.mock.MockDriver;
public class TestIdle3_Concurrent_Starvation_Longtime extends TestCase {
private MockDriver driver;
private DruidDataSource dataSource;
protected void setUp() throws Exception {
driver = new MockDriver();
dataSource = new DruidDataSource();
dataSource.setUrl("jdbc:mock:xxx");
dataSource.setDriver(driver);
dataSource.setInitialSize(1);
dataSource.setMaxActive(1000);
dataSource.setMaxIdle(1000);
dataSource.setMinIdle(1);
dataSource.setMinEvictableIdleTimeMillis(300 * 1000); // 300 / 10
dataSource.setTimeBetweenEvictionRunsMillis(180 * 1000); // 180 / 10
dataSource.setTestWhileIdle(true);
dataSource.setTestOnBorrow(false);
dataSource.setValidationQuery("SELECT 1");
dataSource.setFilters("stat");
ManagementFactory.getPlatformMBeanServer().registerMBean(dataSource,
new ObjectName("com.alibaba:type=DataSource"));
}
protected void tearDown() throws Exception {
ManagementFactory.getPlatformMBeanServer().unregisterMBean(new ObjectName("com.alibaba:type=DataSource"));
}
public void test_idle2() throws Exception {
// 第一次创建连接
{
Assert.assertEquals(0, dataSource.getCreateCount());
Assert.assertEquals(0, dataSource.getActiveCount());
Connection conn = dataSource.getConnection();
Assert.assertEquals(dataSource.getInitialSize(), dataSource.getCreateCount());
Assert.assertEquals(dataSource.getInitialSize(), driver.getConnections().size());
Assert.assertEquals(1, dataSource.getActiveCount());
conn.close();
Assert.assertEquals(0, dataSource.getDestroyCount());
Assert.assertEquals(1, driver.getConnections().size());
Assert.assertEquals(1, dataSource.getCreateCount());
Assert.assertEquals(0, dataSource.getActiveCount());
}
for (int i = 0; i < 1; ++i) {
final int threadCount = 1000;
concurrent(threadCount);
}
// 连续打开关闭单个连接
for (int i = 0; i < 1000; ++i) {
Assert.assertEquals(0, dataSource.getActiveCount());
Connection conn = dataSource.getConnection();
Assert.assertEquals(1, dataSource.getActiveCount());
conn.close();
}
// Assert.assertEquals(2, dataSource.getPoolingCount());
dataSource.close();
}
private void concurrent(final int threadCount) throws Exception {
Thread[] threads = new Thread[threadCount];
final CountDownLatch startLatch = new CountDownLatch(1);
final CountDownLatch endLatch = new CountDownLatch(threadCount);
final AtomicInteger pass = new AtomicInteger();
final CyclicBarrier closedBarrier = new CyclicBarrier(threadCount, new Runnable() {
public void run() {
Assert.assertEquals(threadCount, dataSource.getPoolingCount());
dataSource.shrink(false);
Assert.assertEquals(0, dataSource.getActiveCount());
Assert.assertEquals(dataSource.getMinIdle(), dataSource.getPoolingCount());
if (pass.getAndIncrement() % 100 == 0) {
System.out.println("pass : " + pass.get());
}
}
});
final CyclicBarrier closeBarrier = new CyclicBarrier(threadCount, new Runnable() {
public void run() {
Assert.assertEquals(threadCount, dataSource.getActiveCount());
}
});
for (int i = 0; i < threadCount; ++i) {
threads[i] = new Thread("thread-" + i) {
public void run() {
try {
startLatch.await();
for (int i = 0; i < 1000 * 1000 * 10; ++i) {
Connection conn = dataSource.getConnection();
closeBarrier.await();
conn.close();
closedBarrier.await();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
endLatch.countDown();
}
}
};
}
startLatch.countDown();
for (int i = 0; i < threadCount; ++i) {
threads[i].start();
}
endLatch.await();
// int max = count > dataSource.getMaxActive() ? dataSource.getMaxActive() : count;
// Assert.assertEquals(max, driver.getConnections().size());
}
}