com.mysql.cj.jdbc.util.BaseBugReport Maven / Gradle / Ivy
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/*
* Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* 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, version 2.0,
* 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.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj.jdbc.util;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.Properties;
import com.mysql.cj.jdbc.Driver;
/**
* Base class to help file bug reports for Connector/J.
*
*
* MySQL AB, 2008 Sun Microsystems, 2009 Oracle Corporation really
* appreciates repeatable testcases when reporting bugs, so we're giving you this class to make that job a bit easier (and standarized).
*
*
* To create a testcase, create a class that inherits from this class (com.mysql.cj.jdbc.util.BaseBugReport), and override the methods 'setUp', 'tearDown' and
* 'runTest'.
*
*
* In the 'setUp' method, create code that creates your tables, and populates them with any data needed to demonstrate the bug.
*
*
* In the 'runTest' method, create code that demonstrates the bug using the tables and data you created in the 'setUp' method.
*
*
* In the 'tearDown' method, drop any tables you created in the 'setUp' method.
*
*
* In any of the above three methods, you should use one of the variants of the 'getConnection' method to create a JDBC connection to MySQL, which will use the
* default JDBC URL of 'jdbc:mysql:///test'.
*
*
* If you need to use a JDBC URL that is different than 'jdbc:mysql:///test', then override the method 'getUrl' as well.
*
*
* Use the 'assertTrue' methods to create conditions that must be met in your testcase demonstrating the behavior you are expecting (vs. the behavior you are
* observing, which is why you are most likely filing a bug report).
*
*
* Finally, create a 'main' method that creates a new instance of your testcase, and calls the 'run' method:
*
*
* public static void main(String[] args) throws Exception {
* new MyBugReport().run();
* }
*
*
*
* When filing a potential bug with MySQL Connector/J at http://bugs.mysql.com/ or on the bugs mailing list, please include the code that you have just written
* using this class.
*/
public abstract class BaseBugReport {
private Connection conn;
private Driver driver;
/**
* Constructor for this BugReport, sets up JDBC driver used to create
* connections.
*/
public BaseBugReport() {
try {
this.driver = new Driver();
} catch (SQLException ex) {
throw new RuntimeException(ex.toString());
}
}
/**
* Override this method with code that sets up the testcase for
* demonstrating your bug (creating tables, populating data, etc).
*
* @throws Exception
* if an error occurs during the 'setUp' phase.
*/
public abstract void setUp() throws Exception;
/**
* Override this method with code that cleans up anything created in the
* setUp() method.
*
* @throws Exception
* if an error occurs during the 'tearDown' phase.
*/
public abstract void tearDown() throws Exception;
/**
* Override this method with code that demonstrates the bug. This method
* will be called after setUp(), and before tearDown().
*
* @throws Exception
* if an error occurs during your test run.
*/
public abstract void runTest() throws Exception;
/**
* Runs the testcase by calling the setUp(), runTest() and tearDown()
* methods. The tearDown() method is run regardless of any errors occuring
* in the other methods.
*
* @throws Exception
* if an error occurs in any of the aforementioned methods.
*/
public final void run() throws Exception {
try {
setUp();
runTest();
} finally {
tearDown();
}
}
/**
* Throws an exception with the given message if condition evalutates to
* 'false'.
*
* @param message
* the message to use in the exception
* @param condition
* the condition to test for
* @throws Exception
* if !condition
*/
protected final void assertTrue(String message, boolean condition) throws Exception {
if (!condition) {
throw new Exception("Assertion failed: " + message);
}
}
/**
* Throws an exception if condition evalutates to 'false'.
*
* @param condition
* the condition to test for
* @throws Exception
* if !condition
*/
protected final void assertTrue(boolean condition) throws Exception {
assertTrue("(no message given)", condition);
}
/**
* Provides the JDBC URL to use to demonstrate the bug. The
* java.sql.Connection that you use to demonstrate this bug will be provided
* by the getConnection() method using this URL.
*
* The default value is 'jdbc:mysql:///test'
*
* @return URL
*/
public String getUrl() {
return "jdbc:mysql:///test";
}
/**
* Provides a connection to the JDBC URL specified in getUrl().
*
* If a connection already exists, that connection is returned. Otherwise a
* new connection is created.
*
* @return a connection to the JDBC URL specified in getUrl().
*
* @throws SQLException
* if an error is caused while creating the connection.
*/
public final synchronized Connection getConnection() throws SQLException {
if (this.conn == null || this.conn.isClosed()) {
this.conn = getNewConnection();
}
return this.conn;
}
/**
* Use this if you need to get a new connection for your bug report (i.e.
* there's more than one connection involved).
*
* @return a new connection to the JDBC URL specified in getUrl().
*
* @throws SQLException
* if an error is caused while creating the connection.
*/
public final synchronized Connection getNewConnection() throws SQLException {
return getConnection(getUrl());
}
/**
* Returns a connection using the given URL.
*
* @param url
* the JDBC URL to use
* @return a new java.sql.Connection to the JDBC URL.
* @throws SQLException
* if an error occurs getting the connection.
*/
public final synchronized Connection getConnection(String url) throws SQLException {
return getConnection(url, null);
}
/**
* Returns a connection using the given URL and properties.
*
* @param url
* the JDBC URL to use
* @param props
* the JDBC properties to use
* @return a new java.sql.Connection to the JDBC URL.
* @throws SQLException
* if an error occurs getting the connection.
*/
public final synchronized Connection getConnection(String url, Properties props) throws SQLException {
// Don't follow this example in your own code
// This is to bypass the java.sql.DriverManager
return this.driver.connect(url, props);
}
}