PSCacheTest1.java

/*
 * Copyright 1999-2017 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;

import java.sql.Connection;
import java.sql.PreparedStatement;

import org.junit.Assert;
import junit.framework.TestCase;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidPooledPreparedStatement;
import com.alibaba.druid.util.JdbcUtils;

public class PSCacheTest1 extends TestCase {

    private DruidDataSource dataSource;

    protected void setUp() throws Exception {
        dataSource = new DruidDataSource();
        dataSource.setUrl("jdbc:mock:x1");
        dataSource.setPoolPreparedStatements(true);
        dataSource.setMaxOpenPreparedStatements(10);
    }

    protected void tearDown() throws Exception {
        JdbcUtils.close(dataSource);
    }

    public void test_noTxn() throws Exception {
        {
            Connection conn = dataSource.getConnection();

            String sql = "select 1";

            PreparedStatement stmt0 = conn.prepareStatement(sql);
            DruidPooledPreparedStatement pooledStmt0 = (DruidPooledPreparedStatement) stmt0;
            stmt0.close();

            PreparedStatement stmt1 = conn.prepareStatement(sql);
            DruidPooledPreparedStatement pooledStmt1 = (DruidPooledPreparedStatement) stmt1;

            Assert.assertEquals(1, pooledStmt1.getPreparedStatementHolder().getInUseCount());
            Assert.assertSame(pooledStmt1.getPreparedStatementHolder(), pooledStmt0.getPreparedStatementHolder()); // same

            PreparedStatement stmt2 = conn.prepareStatement(sql);
            DruidPooledPreparedStatement pooledStmt2 = (DruidPooledPreparedStatement) stmt2;

            Assert.assertNotSame(pooledStmt1.getPreparedStatementHolder(), pooledStmt2.getPreparedStatementHolder()); // not
                                                                                                                      // same

            conn.close();
        }
        {
            Connection conn = dataSource.getConnection();

            conn.setAutoCommit(false);

            String sql = "select 1";

            PreparedStatement stmt0 = conn.prepareStatement(sql);
            DruidPooledPreparedStatement pooledStmt0 = (DruidPooledPreparedStatement) stmt0;
            stmt0.close();

            PreparedStatement stmt1 = conn.prepareStatement(sql);
            DruidPooledPreparedStatement pooledStmt1 = (DruidPooledPreparedStatement) stmt1;

            Assert.assertEquals(1, pooledStmt1.getPreparedStatementHolder().getInUseCount());
            Assert.assertSame(pooledStmt1.getPreparedStatementHolder(), pooledStmt0.getPreparedStatementHolder()); // same

            PreparedStatement stmt2 = conn.prepareStatement(sql);
            DruidPooledPreparedStatement pooledStmt2 = (DruidPooledPreparedStatement) stmt2;

            Assert.assertNotSame(pooledStmt1.getPreparedStatementHolder(), pooledStmt2.getPreparedStatementHolder()); // not
                                                                                                                      // same

            stmt1.close();
            stmt2.close();

            conn.close();
        }
    }

  
}