HSQLDB example source code file (TestJDBCSavepoints.java)

This example HSQLDB source code file (TestJDBCSavepoints.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 - HSQLDB tags/keywords

connection, exception, exception, jdbc, jdbc-created, savepoint, savepoint, server, sql, sql-savepoint, string, string, testcase, testjdbcsavepoints, testjdbcsavepoints, testresult

The HSQLDB TestJDBCSavepoints.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Savepoint;
import java.sql.Statement;

import org.hsqldb.WebServer;

import junit.framework.TestCase;
import junit.framework.TestResult;

import org.hsqldb.jdbc.jdbcDataSource;
import org.hsqldb.Server;

/**
 * Tests JDBC java.sql.Savepoint support in context of new engine SQL-savepoint
 * support and new HSQL protocol extensions for savepoint support. <p>
 *
 * @author boucher@users
 * @version 1.7.2
 * @since 1.7.2
 */
public class TestJDBCSavepoints extends TestCase {

//  You change the url and serverProps to reflect your preferred settings
    // String serverProps = "database.0=mem:test;dbname.0=;silent=false;trace=true" // debugging
    String serverProps =
        "database.0=mem:test;dbname.0=;silent=true;trace=false";

    String     url         = "jdbc:hsqldb:hsql://localhost";
//    String     url = "jdbc:hsqldb:http://localhost";
    String     user;
    String     password;
    Statement  stmt;
    Connection conn1;
    Connection conn2;

    // Server server;
    // this exercises everything:
    // the engine and JDBC savepoint support,
    // the new HSQL protocol and tunneling HSQL protocol over HTTP
    Server server;

    public TestJDBCSavepoints(String name) {
        super(name);
    }

    protected void setUp() {

        user     = "sa";
        password = "";
        stmt     = null;
        conn1    = null;
        conn2    = null;

        server   = new Server();
        // server = new WebServer();

        server.putPropertiesFromString(serverProps);
        server.setLogWriter(null);
        server.start();

        try {
            jdbcDataSource dataSource = new jdbcDataSource();

            dataSource.setDatabase(url);

            conn1 = dataSource.getConnection(user, password);
            conn2 = dataSource.getConnection(user, password);
            stmt  = conn1.createStatement();
        } catch (Exception e) {

            //e.printStackTrace();
            System.out.println(this + ".setUp() error: " + e.getMessage());
        }
    }

    protected void tearDown() {

        try {
            conn1.close();
        } catch (Exception e) {

            //e.printStackTrace();
            System.out.println(this + ".tearDown() error: " + e.getMessage());
        }

        try {
            conn2.close();
        } catch (Exception e) {

            //e.printStackTrace();
            System.out.println(this + ".tearDown() error: " + e.getMessage());
        }

        server.stop();
    }

    public void testJDBCSavepoints() throws Exception {

        String            sql;
        String            msg;
        int               i;
        PreparedStatement ps;
        ResultSet         rs;
        Savepoint         sp1;
        Savepoint         sp2;
        Savepoint         sp3;
        Savepoint         sp4;
        Savepoint         sp5;
        Savepoint         sp6;
        Savepoint         sp7;
        int               rowcount = 0;

        sql = "drop table t if exists";

        stmt.executeUpdate(sql);

        sql = "create table t(id int, fn varchar(20), ln varchar(20), zip int)";

        stmt.executeUpdate(sql);
        conn1.setAutoCommit(true);

        //-- Test 1 : The execution of an SQL savepoint statement shall
        //            raise an exception in the absence of an active
        //            enclosing transaction
        // fredt@users - there is always an active transaction when autocommit
        // is true. The transaction is committed automatically if the next
        // Statement.execute() or similar call is performed successfully.
/*
        msg = "savepoint set successfully in the abscence of an active transaction";
        try {
            conn.setSavepoint("savepoint1");
            assertTrue(msg,false);
        } catch (Exception e) {}

*/

        //-- setup for following tests
        conn1.setAutoCommit(false);

        sql = "insert into t values(?,?,?,?)";
        ps  = conn1.prepareStatement(sql);

        ps.setString(2, "Mary");
        ps.setString(3, "Peterson-Clancy");

        i = 0;

        for (; i < 10; i++) {
            ps.setInt(1, i);
            ps.setInt(4, i);
            ps.executeUpdate();
        }

        sp1 = conn1.setSavepoint("savepoint1");

        for (; i < 20; i++) {
            ps.setInt(1, i);
            ps.setInt(4, i);
            ps.executeUpdate();
        }

        sp2 = conn1.setSavepoint("savepoint2");

        for (; i < 30; i++) {
            ps.setInt(1, i);
            ps.setInt(4, i);
            ps.executeUpdate();
        }

        sp3 = conn1.setSavepoint("savepoint3");

        for (; i < 40; i++) {
            ps.setInt(1, i);
            ps.setInt(4, i);
            ps.executeUpdate();
        }

        sp4 = conn1.setSavepoint("savepoint4");

        for (; i < 50; i++) {
            ps.setInt(1, i);
            ps.setInt(4, i);
            ps.executeUpdate();
        }

        sp5 = conn1.setSavepoint("savepoint5");
        sp6 = conn1.setSavepoint("savepoint6");
        sp7 = conn1.setSavepoint("savepoint7");
        rs  = stmt.executeQuery("select count(*) from t");

        rs.next();

        rowcount = rs.getInt(1);

        rs.close();

        //-- Test 2 : count of rows matches # rows inserted (assertion req'd by
        //            following tests, but not directly related to the feature
        //            being tested)
        msg = "select count(*) from t value";

        try {
            assertEquals(msg, 50, rowcount);
        } catch (Exception e) {}

        conn2.setAutoCommit(false);
        conn2.setSavepoint("savepoint1");
        conn2.setSavepoint("savepoint2");

        //-- test 3 : A JDBC Savepoint shall be considered invalid if used to
        //            release an SQL-savepoint in an SQL-session other than that
        //            of the originating Connection object
        msg = "savepoint released succesfully on non-originating connection";

        try {
            conn2.releaseSavepoint(sp2);
            assertTrue(msg, false);
        } catch (Exception e) {}

        //-- test 4 : A JDBC Savepoint shall be invalid if used to roll back to
        //            an SQL-savepoint in an SQL-session other than that of the
        //            originating Connection object
        try {
            conn2.rollback(sp1);

            msg = "succesful rollback to savepoint on "
                  + "non-originating connection";

            assertTrue(msg, false);
        } catch (Exception e) {}

        //-- test 5 : Direct execution of a <release savepoint> statement shall
        //            not fail to release an existing indicated savepoint,
        //            regardless of how the indicated savepoint was created
        msg = "direct execution of <release savepoint> statement failed to "
              + "release JDBC-created SQL-savepoint with identical savepoint name";

        try {
            conn2.createStatement().executeUpdate(
                "release savepoint \"savepoint2\"");
        } catch (Exception e) {
            try {
                assertTrue(msg, false);
            } catch (Exception e2) {}
        }

        //-- test 6 : Direct execution of a <rollback to savepoint> statement
        //            shall not fail to roll back to an existing indicated
        //            savepoint due and only due to how the indicated savepoint
        //            was created
        msg = "direct execution of <rollback to savepoint> statement failed to "
              + "roll back to existing JDBC-created SQL-savepoint with identical "
              + "savepoint name";

        try {
            conn2.createStatement().executeUpdate(
                "rollback to savepoint \"savepoint1\"");
        } catch (Exception e) {
            e.printStackTrace();

            try {
                assertTrue(msg, false);
            } catch (Exception e2) {}
        }

        conn1.releaseSavepoint(sp6);

        //-- test 7 : Releasing an SQL-savepoint shall destroy that savepoint
        msg = "savepoint released succesfully > 1 times";

        try {
            conn1.releaseSavepoint(sp6);
            assertTrue(msg, false);
        } catch (Exception e) {}

        //-- test 8 : Releasing an SQL-savepoint shall destroy all subsequent SQL-
        //            savepoints in the same savepoint level
        msg = "savepoint released successfully after preceding savepoint released";

        try {
            conn1.releaseSavepoint(sp7);
            assertTrue(msg, false);
        } catch (Exception e) {}

        //-- test 9 : Releasing an SQL-savepoint shall not affect preceding
        //            savepoints
        msg = "preceding same-point savepoint destroyed by following savepoint release";

        try {
            conn1.releaseSavepoint(sp5);
        } catch (Exception e) {
            try {
                assertTrue(msg, false);
            } catch (Exception e2) {}
        }

        conn1.rollback(sp4);

        rs = stmt.executeQuery("select count(*) from t");

        rs.next();

        rowcount = rs.getInt(1);

        rs.close();

        //-- Test 10 : count of rows matches # rows inserted less the number
        //             of insertions rolled back
        msg = "select * rowcount after 50 inserts - 10 rolled back:";

        try {
            assertEquals(msg, 40, rowcount);
        } catch (Exception e) {}

        //-- test 11 : An SQL-savepoint shall be destroyed in the
        //            process of rolling back to that savepoint
        msg = "savepoint rolled back succesfully > 1 times";

        try {
            conn1.rollback(sp4);
            assertTrue(msg, false);
        } catch (Exception e) {}

        conn1.rollback(sp3);

        rs = stmt.executeQuery("select count(*) from t");

        rs.next();

        rowcount = rs.getInt(1);

        rs.close();

        //-- Test 12 : count of rows matches # rows inserted less the number
        //             of insertions rolled back
        msg = "select count(*) after 50 inserts - 20 rolled back:";

        try {
            assertEquals(msg, 30, rowcount);
        } catch (Exception e) {}

        //-- test 13 : An SQL-savepoint shall be destroyed in the
        //            process of rolling back to that savepoint
        msg = "savepoint released succesfully after use in rollback";

        try {
            conn1.releaseSavepoint(sp3);
            assertTrue(msg, false);
        } catch (Exception e) {}

        conn1.rollback(sp1);

        //-- test 14 : All subsequent savepoints (in a savepoint level)
        //            shall be destroyed by the process of rolling back to
        //            a preceeding savepoint (in the same savepoint level)
        msg = "savepoint rolled back without raising an exception after "
              + "rollback to a preceeding savepoint";

        try {
            conn1.rollback(sp2);
            assertTrue(msg, false);
        } catch (Exception e) {}

        conn1.rollback();

        //-- test 15 : All subsequent savepoints (in a savepoint level)
        //            shall be destroyed by the process of
        //            rolling back the active transaction
        msg = "savepoint released succesfully when it should have been "
              + "destroyed by a full rollback";

        try {
            conn1.releaseSavepoint(sp1);
            assertTrue(msg, false);
        } catch (Exception e) {}

        conn1.setAutoCommit(false);

        sp1 = conn1.setSavepoint("savepoint1");

        conn1.rollback();
        conn1.setAutoCommit(false);
        conn1.createStatement().executeUpdate("savepoint \"savepoint1\"");

        //-- test 16 : A JDBC Savepoint shall be considered invalid if used to
        //             release an SQL-savepoint other than precisely the
        //             one created in correspondence to the creation of that
        //             JDBC Savepoint object
        // fredt@users - we allow this if the name is valid
/*
        msg = "JDBC Savepoint used to successfully release an identically named "
              + "savepoint in a transaction distinct from the originating "
              + "transaction";
        try {
            conn1.releaseSavepoint(sp1);
            assertTrue(msg, false);
        } catch (Exception e) {}
*/
        conn1.setAutoCommit(false);

        sp1 = conn1.setSavepoint("savepoint1");

        conn1.createStatement().executeUpdate("savepoint \"savepoint1\"");

        //-- test 17 : A JDBC Savepoint shall be considered invalid if used to
        //             release an SQL-savepoint other than precisely the
        //             one created in correspondence to the creation of that
        //             JDBC Savepoint object
        // fredt@users - we allow this if the name is valid
/*
        msg = "JDBC Savepoint used to successfully release an identically named "
              + "savepoint in a transaction other than the originating "
              + "transaction";
        try {
            conn1.releaseSavepoint(sp1);
            assertTrue(msg, false);
        } catch (Exception e) {}
*/

        //-- test 18 : A JDBC Savepoint shall be considered invalid if used to
        //             roll back to an SQL-savepoint other than precisely the
        //             one created in correspondence to the creation of that
        //             JDBC Savepoint object
        // fredt@users - we allow this if the name is valid
/*
        msg = "JDBC Savepoint used to successfully to roll back to an "
              + "identically named savepoint in a transaction distinct "
              + "from the originating transaction";
        try {
            conn1.rollback(sp1);
            assertTrue(msg, false);
        } catch (Exception e) {}
*/
        conn1.setAutoCommit(false);

        sp1 = conn1.setSavepoint("savepoint1");

        conn1.createStatement().executeUpdate("savepoint \"savepoint1\"");

        //-- test 19 : A JDBC Savepoint shall be considered invalid if used to
        //             roll back to an SQL-savepoint other than precisely the
        //             one created in correspondence to the creation of that
        //             JDBC Savepoint object
        // fredt@users - we allow this if the name is valid
/*
        msg = "JDBC Savepoint used to successfully release an identically named "
              + "savepoint in a transaction other than the originating "
              + "transaction";
        try {
            conn1.releaseSavepoint(sp1);
            assertTrue(msg, false);
        } catch (Exception e) {}
*/
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws Exception {

        TestResult            result;
        TestCase              test;
        java.util.Enumeration failures;
        int                   count;

        result = new TestResult();
        test   = new TestJDBCSavepoints("testJDBCSavepoints");

        test.run(result);

        count = result.failureCount();

        System.out.println("TestJDBCSavepoints failure count: " + count);

        failures = result.failures();

        while (failures.hasMoreElements()) {
            System.out.println(failures.nextElement());
        }
    }
}