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