content: /*
   * Copyright 1999-2018 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;
  
  import com.alibaba.druid.mock.MockDriver;
  import junit.framework.TestCase;
  import org.apache.commons.dbcp.BasicDataSource;
  
  import java.sql.Connection;
  import java.util.concurrent.CountDownLatch;
  
  public class DBCPTest extends TestCase {
      public void test_max() throws Exception {
          Class.forName("com.alibaba.druid.mock.MockDriver");
  
          final BasicDataSource dataSource = new BasicDataSource();
  //        final DruidDataSource dataSource = new DruidDataSource();
          dataSource.setInitialSize(3);
          dataSource.setMaxActive(20);
          dataSource.setMaxIdle(20);
          dataSource.setDriverClassName("com.alibaba.druid.mock.MockDriver");
          dataSource.setUrl("jdbc:mock:xxx");
  
          final int THREAD_COUNT = 200;
          final CountDownLatch endLatch = new CountDownLatch(THREAD_COUNT);
          final CountDownLatch startLatch = new CountDownLatch(1);
          Thread[] threads = new Thread[THREAD_COUNT];
          for (int i = 0; i < THREAD_COUNT; ++i) {
              threads[i] = new Thread() {
                  public void run() {
                      try {
                          startLatch.await();
                          for (int i = 0; i < 1000; ++i) {
                              Connection conn = dataSource.getConnection();
                              Thread.sleep(1);
                              conn.close();
                          }
                      } catch (Exception e) {
                      } finally {
                          endLatch.countDown();
                      }
                  }
              };
              threads[i].start();
          }
  
          startLatch.countDown();
  
          endLatch.await();
  
  //        System.out.println(dataSource.getNumIdle());
          System.out.println(MockDriver.instance.getConnections().size());
          System.out.println(MockDriver.instance.getConnectionCloseCount());
      }
  }
  