/*
* 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.bvt.pool.dynamic;
import java.sql.Connection;
import org.junit.Assert;
import junit.framework.TestCase;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.GetConnectionTimeoutException;
import com.alibaba.druid.util.JdbcUtils;
public class MaxActiveChangeTest extends TestCase {
private DruidDataSource dataSource;
protected void setUp() throws Exception {
dataSource = new DruidDataSource();
dataSource.setUrl("jdbc:mock:xxx");
dataSource.setTestOnBorrow(false);
dataSource.setMaxActive(3);
dataSource.setMinIdle(1);
dataSource.setMinEvictableIdleTimeMillis(1000 * 60 * 5);
dataSource.setMaxWait(20);
dataSource.init();
}
protected void tearDown() throws Exception {
dataSource.close();
}
public void test_maxActive() throws Exception {
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(1, connect(1));
Assert.assertEquals(1, dataSource.getPoolingCount());
}
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(2, connect(2));
Assert.assertEquals(2, dataSource.getPoolingCount());
}
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(3, connect(3));
Assert.assertEquals(3, dataSource.getPoolingCount());
}
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(3, connect(4));
Assert.assertEquals(3, dataSource.getPoolingCount());
}
dataSource.setMaxActive(4);
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(4, connect(4));
Assert.assertEquals(4, dataSource.getPoolingCount());
}
dataSource.shrink();
Assert.assertEquals(1, dataSource.getPoolingCount());
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(4, connect(4));
Assert.assertEquals(4, dataSource.getPoolingCount());
}
Assert.assertEquals(4, dataSource.getPoolingCount());
dataSource.setMaxActive(3);
Assert.assertEquals(4, dataSource.getPoolingCount());
dataSource.shrink();
Assert.assertEquals(1, dataSource.getPoolingCount());
// 确保收缩之后不会再长上去
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(3, connect(4));
Assert.assertEquals(3, dataSource.getPoolingCount());
}
dataSource.setMaxActive(2);
dataSource.shrink();
Assert.assertEquals(1, dataSource.getPoolingCount());
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(2, connect(3));
Assert.assertEquals(2, dataSource.getPoolingCount());
}
dataSource.setMaxActive(1);
dataSource.shrink();
Assert.assertEquals(1, dataSource.getPoolingCount());
for (int i = 0; i < 10; ++i) {
Assert.assertEquals(1, connect(2));
Assert.assertEquals(1, dataSource.getPoolingCount());
}
Exception error = null;
try {
dataSource.setMaxActive(0);
} catch (IllegalArgumentException e) {
error = e;
}
Assert.assertNotNull(error);
Assert.assertEquals(1, dataSource.getMaxActive());
}
public int connect(int count) throws Exception {
int successCount = 0;
Connection[] connections = new Connection[count];
for (int i = 0; i < count; ++i) {
try {
connections[i] = dataSource.getConnection();
successCount++;
} catch (GetConnectionTimeoutException e) {
// skip
}
}
for (int i = 0; i < count; ++i) {
JdbcUtils.close(connections[i]);
}
return successCount;
}
}