datasourcetest.java

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/*
      Copyright (C) 2002-2004 MySQL AB

      This program is free software; you can redistribute it and/or modify
      it under the terms of version 2 of the GNU General Public License as 
      published by the Free Software Foundation.

      There are special exceptions to the terms and conditions of the GPL 
      as it is applied to this software. View the full text of the 
      exception in file EXCEPTIONS-CONNECTOR-J in the directory of this 
      software distribution.

      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA



 */
package testsuite.simple;

import testsuite.BaseTestCase;

import java.io.File;

import java.sql.Connection;

import java.util.Hashtable;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.Name;
import javax.naming.NameParser;
import javax.naming.Reference;
import javax.naming.spi.ObjectFactory;

import javax.sql.DataSource;
import javax.sql.PooledConnection;

import com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource;


/**
 *
 * @author  Mark Matthews
 * @version $Id: DataSourceTest.java,v 1.10.4.7 2004/12/01 21:53:35 mmatthew Exp $
 */
public class DataSourceTest extends BaseTestCase {
    //~ Instance fields --------------------------------------------------------

    private Context ctx;
    private File tempDir;

    //~ Constructors -----------------------------------------------------------

    /**
     * Creates a new DataSourceTest object.
     *
     * @param name DOCUMENT ME!
     */
    public DataSourceTest(String name) {
        super(name);
    }

    //~ Methods ----------------------------------------------------------------

    /**
     * Runs all test cases in this test suite
     *
     * @param args
     */
    public static void main(String[] args) {
        junit.textui.TestRunner.run(DataSourceTest.class);
    }

    /**
     * Sets up this test, calling registerDataSource() to bind a
     * DataSource into JNDI, using the FSContext JNDI provider from Sun
     *
     * @throws Exception if an error occurs.
     */
    public void setUp() throws Exception {
        super.setUp();
        registerDataSource();
    }

    /**
     * Un-binds the DataSource, and cleans up the filesystem
     *
     * @throws Exception if an error occurs
     */
    public void tearDown() throws Exception {
    	this.ctx.unbind(this.tempDir.getAbsolutePath() + "/test");
    	this.ctx.close();
    	this.tempDir.delete();
        super.tearDown();
    }

    /**
     * Tests that we can get a connection from the DataSource bound
     * in JNDI during test setup
     *
     * @throws Exception if an error occurs
     */
    public void testDataSource() throws Exception {
        NameParser nameParser = this.ctx.getNameParser("");
        Name datasourceName = nameParser.parse(this.tempDir.getAbsolutePath()
                + "/test");
        Object obj = this.ctx.lookup(datasourceName);
        DataSource boundDs = null;

        if (obj instanceof DataSource) {
            boundDs = (DataSource) obj;
        } else if (obj instanceof Reference) {
            //
            // For some reason, this comes back as a Reference
            // instance under CruiseControl !?
            //
            Reference objAsRef = (Reference) obj;
            ObjectFactory factory = (ObjectFactory) Class.forName(objAsRef
                    .getFactoryClassName()).newInstance();
            boundDs = (DataSource) factory.getObjectInstance(objAsRef,
                    datasourceName, this.ctx, new Hashtable());
        }

        assertTrue("Datasource not bound", boundDs != null);

        Connection con = boundDs.getConnection();
        con.close();
        assertTrue("Connection can not be obtained from data source",
            con != null);
    }

    /**
     * Tests whether Connection.changeUser() (and thus pooled connections) restore
     * character set information correctly.
     * 
     * @throws Exception if the test fails.
     */
    public void testChangeUserAndCharsets() throws Exception {
    	if (versionMeetsMinimum(4, 1)) {
	    	MysqlConnectionPoolDataSource ds = new MysqlConnectionPoolDataSource();
	    	ds.setURL(BaseTestCase.dbUrl);
	    	ds.setCharacterEncoding("utf-8");
	    	PooledConnection pooledConnection = ds.getPooledConnection();
	
	    	Connection connToMySQL = pooledConnection.getConnection();
	    	this.rs = connToMySQL.createStatement().executeQuery("SHOW VARIABLES LIKE 'character_set_results'");
	    	assertTrue(this.rs.next());
	    	assertTrue("NULL".equalsIgnoreCase(this.rs.getString(2)));
	    	
	    	this.rs = connToMySQL.createStatement().executeQuery("SHOW VARIABLES LIKE 'character_set_client'");
	    	assertTrue(this.rs.next());
	    	assertTrue("utf8".equalsIgnoreCase(this.rs.getString(2)));
	    	
	    	connToMySQL.close();
	
	    	connToMySQL = pooledConnection.getConnection();
	     	this.rs = connToMySQL.createStatement().executeQuery("SHOW VARIABLES LIKE 'character_set_results'");
	     	assertTrue(this.rs.next());
	     	assertTrue("NULL".equalsIgnoreCase(this.rs.getString(2)));
	     	
	     	this.rs = connToMySQL.createStatement().executeQuery("SHOW VARIABLES LIKE 'character_set_client'");
	    	assertTrue(this.rs.next());
	    	assertTrue("utf8".equalsIgnoreCase(this.rs.getString(2)));
	    	
	    	pooledConnection.getConnection().close();
    	}
    }
    
    /**
     * This method is separated from the rest of the example since you
     * normally would NOT register a JDBC driver in your code.  It would
     * likely be configered into your naming and directory service using some
     * GUI.
     *
     * @throws Exception if an error occurs
     */
    private void registerDataSource() throws Exception {
    	this.tempDir = File.createTempFile("jnditest", null);
    	this.tempDir.delete();
    	this.tempDir.mkdir();
    	this.tempDir.deleteOnExit();

        com.mysql.jdbc.jdbc2.optional.MysqlDataSource ds;
        Hashtable env = new Hashtable();
        env.put(Context.INITIAL_CONTEXT_FACTORY,
            "com.sun.jndi.fscontext.RefFSContextFactory");
        this.ctx = new InitialContext(env);
        assertTrue("Naming Context not created", this.ctx != null);
        ds = new com.mysql.jdbc.jdbc2.optional.MysqlDataSource();
        ds.setUrl(dbUrl); // from BaseTestCase
        this.ctx.bind(this.tempDir.getAbsolutePath() + "/test", ds);
    }
}