connectiontest.java

MySql Java Connector

/*
 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 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 com.mysql.jdbc.SQLError;

import testsuite.BaseTestCase;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import java.util.Properties;


/**
 * Tests java.sql.Connection functionality  ConnectionTest.java,v 1.1
 * 2002/12/06 22:01:05 mmatthew Exp
 *
 * @author Mark Matthews
 */
public class ConnectionTest extends BaseTestCase {
    /**
     * Constructor for ConnectionTest.
     *
     * @param name the name of the test to run
     */
    public ConnectionTest(String name) {
        super(name);
    }

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

    /**
     * Tests catalog functionality
     *
     * @throws Exception if an error occurs
     */
    public void testCatalog() throws Exception {
        String currentCatalog = this.conn.getCatalog();
        this.conn.setCatalog(currentCatalog);
        assertTrue(currentCatalog.equals(this.conn.getCatalog()));
    }

    /**
     * Tests a cluster connection for failover, requires a two-node cluster URL
     * specfied in com.mysql.jdbc.testsuite.ClusterUrl system proeprty.
     *
     * @throws Exception DOCUMENT ME!
     */
    public void testClusterConnection() throws Exception {
        String url = System.getProperty("com.mysql.jdbc.testsuite.ClusterUrl");

        if ((url != null) && (url.length() > 0)) {
            Object versionNumObj = getSingleValueWithQuery(
                    "SHOW VARIABLES LIKE 'version'");

            if ((versionNumObj != null)
                    && (versionNumObj.toString().indexOf("cluster") != -1)) {
                Connection clusterConn = null;
                Statement clusterStmt = null;

                try {
                    DriverManager.getConnection(url);

                    clusterStmt = clusterConn.createStatement();
                    clusterStmt.executeQuery(
                        "DROP TABLE IF EXISTS testClusterConn");
                    clusterStmt.executeQuery(
                        "CREATE TABLE testClusterConn (field1 INT) TYPE=ndbcluster");
                    clusterStmt.executeQuery(
                        "INSERT INTO testClusterConn VALUES (1)");

                    clusterConn.setAutoCommit(false);

                    clusterStmt.executeQuery("SELECT * FROM testClusterConn");
                    clusterStmt.executeUpdate(
                        "UPDATE testClusterConn SET field1=4");

                    // Kill the connection
                    String connectionId = getSingleValueWithQuery(
                            "SELECT CONNECTION_ID()").toString();

                    System.out.println(
                        "Please kill the MySQL server now and press return...");
                    System.in.read();

                    System.out.println("Waiting for TCP/IP timeout...");
                    Thread.sleep(10);

                    System.out.println("Attempting auto reconnect");

                    try {
                        clusterConn.setAutoCommit(true);
                        clusterConn.setAutoCommit(false);
                    } catch (SQLException sqlEx) {
                        System.out.println(sqlEx);
                    }

                    //
                    // Test that this 'new' connection is not read-only
                    //
                    clusterStmt.executeUpdate(
                        "UPDATE testClusterConn SET field1=5");

                    ResultSet rs = clusterStmt.executeQuery(
                            "SELECT * FROM testClusterConn WHERE field1=5");

                    assertTrue("One row should be returned", rs.next());
                } finally {
                    if (clusterStmt != null) {
                        clusterStmt.executeQuery(
                            "DROP TABLE IF EXISTS testClusterConn");
                        clusterStmt.close();
                    }

                    if (clusterConn != null) {
                        clusterConn.close();
                    }
                }
            }
        }
    }

    /**
     * DOCUMENT ME!
     *
     * @throws Exception DOCUMENT ME!
     */
    public void testDeadlockDetection() throws Exception {
        try {
            this.rs = this.stmt.executeQuery(
                    "SHOW VARIABLES LIKE 'innodb_lock_wait_timeout'");
            this.rs.next();

            int timeoutSecs = this.rs.getInt(2);

            this.stmt.executeUpdate("DROP TABLE IF EXISTS t1");
            this.stmt.executeUpdate(
                "CREATE TABLE t1 (id INTEGER, x INTEGER) TYPE=INNODB");
            this.stmt.executeUpdate("INSERT INTO t1 VALUES(0, 0)");
            this.conn.setAutoCommit(false);
            this.conn.createStatement().executeQuery("SELECT * FROM t1 WHERE id=0 FOR UPDATE");

            Connection deadlockConn = getConnectionWithProps(new Properties());
            deadlockConn.setAutoCommit(false);

            // The following query should hang because con1 is locking the page
            deadlockConn.createStatement().executeUpdate("UPDATE t1 SET x=2 WHERE id=0");
            deadlockConn.commit();

            Thread.sleep(timeoutSecs * 2 * 1000);
        } catch (SQLException sqlEx) {
            System.out.println(
                "Caught SQLException due to deadlock/lock timeout");
            System.out.println("SQLState: " + sqlEx.getSQLState());
            System.out.println("Vendor error: " + sqlEx.getErrorCode());

            //
            // Check whether the driver thinks it really is deadlock...
            //
            assertTrue(SQLError.SQL_STATE_DEADLOCK.equals(sqlEx.getSQLState()));
            assertTrue(sqlEx.getErrorCode() == 1205);
        } finally {
            this.conn.setAutoCommit(true);
            this.stmt.executeUpdate("DROP TABLE IF EXISTS t1");
        }
    }

    /**
     * Tests isolation level functionality
     *
     * @throws Exception if an error occurs
     */
    public void testIsolationLevel() throws Exception {
        int[] isolationLevels = new int[] {
                Connection.TRANSACTION_NONE,
                Connection.TRANSACTION_READ_COMMITTED,
                Connection.TRANSACTION_READ_UNCOMMITTED,
                Connection.TRANSACTION_REPEATABLE_READ,
                Connection.TRANSACTION_SERIALIZABLE
            };

        DatabaseMetaData dbmd = this.conn.getMetaData();

        for (int i = 0; i < isolationLevels.length; i++) {
            if (dbmd.supportsTransactionIsolationLevel(isolationLevels[i])) {
                this.conn.setTransactionIsolation(isolationLevels[i]);

                assertTrue("Transaction isolation level that was set was not returned",
                    this.conn.getTransactionIsolation() == isolationLevels[i]);
            }
        }
    }

    /**
     * Tests setting profileSql on/off in the span of one connection.
     *
     * @throws Exception if an error occurs.
     */
    public void testSetProfileSql() throws Exception {
        ((com.mysql.jdbc.Connection) this.conn).setProfileSql(false);
        stmt.executeQuery("SELECT 1");
        ((com.mysql.jdbc.Connection) this.conn).setProfileSql(true);
        stmt.executeQuery("SELECT 1");
    }
}