Commons DBCP example source code file (TestPoolingDataSource.java)

This example Commons DBCP source code file (TestPoolingDataSource.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons DBCP tags/keywords

connection, connection, delegatingconnection, delegatingconnection, exception, exception, genericobjectpool, jdbc, nondelegatingpoolableconnectionfactory, nondelegatingpoolableconnectionfactory, poolableconnectionfactory, poolingdatasource, properties, sql, testerdriver, testpoolingdatasource, util

The Commons DBCP TestPoolingDataSource.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.commons.dbcp;

import java.sql.Connection;
import java.util.Properties;

import junit.framework.Test;
import junit.framework.TestSuite;

import org.apache.commons.pool.ObjectPool;
import org.apache.commons.pool.impl.GenericObjectPool;

/**
 * TestSuite for PoolingDataSource
 * 
 * @version $Revision: 392677 $ $Date: 2006-04-08 21:42:24 -0700 (Sat, 08 Apr 2006) $
 */
public class TestPoolingDataSource extends TestConnectionPool {
    public TestPoolingDataSource(String testName) {
        super(testName);
    }

    public static Test suite() {
        return new TestSuite(TestPoolingDataSource.class);
    }

    protected Connection getConnection() throws Exception {
        return ds.getConnection();
    }

    protected PoolingDataSource ds = null;
    private GenericObjectPool pool = null;

    public void setUp() throws Exception {
        super.setUp();
        pool = new GenericObjectPool();
        pool.setMaxActive(getMaxActive());
        pool.setMaxWait(getMaxWait());
        Properties props = new Properties();
        props.setProperty("user", "username");
        props.setProperty("password", "password");
        PoolableConnectionFactory factory = 
            new PoolableConnectionFactory(
                new DriverConnectionFactory(new TesterDriver(),
                        "jdbc:apache:commons:testdriver", props),
                pool, null, "SELECT DUMMY FROM DUAL", true, true);
        pool.setFactory(factory);
        ds = new PoolingDataSource(pool);
        ds.setAccessToUnderlyingConnectionAllowed(true);
    }

    public void tearDown() throws Exception {
        pool.close();
        super.tearDown();
    }
    
    public void testPoolGuardConnectionWrapperEqualsSameDelegate() throws Exception {
        // Get a maximal set of connections from the pool 
        Connection[] c = new Connection[getMaxActive()];
        for (int i = 0; i < c.length; i++) {
            c[i] = newConnection();
        }
        // Close the delegate of one wrapper in the pool
        ((DelegatingConnection) c[0]).getDelegate().close();
        
        // Grab a new connection - should get c[0]'s closed connection
        // so should be delegate-equivalent, so equal
        Connection con = newConnection();
        assertTrue(c[0].equals(con));
        assertTrue(con.equals(c[0]));
        for (int i = 0; i < c.length; i++) {
            c[i].close();
        }
    }
    
    private void checkPoolGuardConnectionWrapperEqualsReflexive() throws Exception {
        Connection con = ds.getConnection();
        Connection con2 = con;
        assertTrue(con2.equals(con));
        assertTrue(con.equals(con2));
        con.close();
    }
    
    /*
     * JIRA: DBCP-198
     */
    public void testPoolGuardConnectionWrapperEqualsReflexive()
        throws Exception {
        // Statndard setup - using DelegatingConnections
        // returned from PoolableConnectionFactory
        checkPoolGuardConnectionWrapperEqualsReflexive();
        // Force PoolGuardConnectionWrappers to wrap non-Delegating connections
        pool.close();
        pool = new GenericObjectPool();
        pool.setMaxActive(getMaxActive());
        pool.setMaxWait(getMaxWait());
        Properties props = new Properties();
        props.setProperty("user", "username");
        props.setProperty("password", "password");
        NonDelegatingPoolableConnectionFactory factory = 
            new NonDelegatingPoolableConnectionFactory(
                new DriverConnectionFactory(new TesterDriver(),
                        "jdbc:apache:commons:testdriver", props), pool);
        pool.setFactory(factory);
        ds = new PoolingDataSource(pool);
        checkPoolGuardConnectionWrapperEqualsReflexive();
    }
    
    public void testPoolGuardConnectionWrapperEqualsFail() throws Exception {
        Connection con1 = ds.getConnection();
        Connection con2 = ds.getConnection();
        assertFalse(con1.equals(con2));
        con1.close();
        con2.close();
    }
    
    public void testPoolGuardConnectionWrapperEqualsNull() throws Exception {
        Connection con1 = ds.getConnection();
        Connection con2 = null;
        assertFalse(con1.equals(con2));
        con1.close();
    }
    
    public void testPoolGuardConnectionWrapperEqualsType() throws Exception {
        Connection con1 = ds.getConnection();
        Integer con2 = new Integer(0);
        assertFalse(con1.equals(con2));
        con1.close();
    }
    
    public void testestPoolGuardConnectionWrapperEqualInnermost() throws Exception {
        ds.setAccessToUnderlyingConnectionAllowed(true);
        DelegatingConnection con = (DelegatingConnection) ds.getConnection();
        Connection inner = con.getInnermostDelegate();
        ds.setAccessToUnderlyingConnectionAllowed(false);
        DelegatingConnection con2 = new DelegatingConnection(inner);
        assertTrue(con2.equals(con));
        assertTrue(con.innermostDelegateEquals(con2.getInnermostDelegate()));
        assertTrue(con2.innermostDelegateEquals(inner));
        assertTrue(con.equals(con2));
    }
    
    /** Factory to return non-delegating connections for DBCP-198 test */
    private static class NonDelegatingPoolableConnectionFactory
            extends PoolableConnectionFactory {
        public NonDelegatingPoolableConnectionFactory(ConnectionFactory connFactory, ObjectPool pool) {
            super(connFactory, pool, null, null, true, true);
        }
    
        synchronized public Object makeObject() throws Exception {
            return _connFactory.createConnection();
        }
    }
}