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annotate tests/Test_CisValid.java @ 0:a5a898f6886c

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Copy of MonetDB java directory changeset e6e32756ad31.
author Sjoerd Mullender <sjoerd@acm.org>
date Wed, 21 Sep 2016 09:34:48 +0200 (2016-09-21)
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children 04fbf3655452
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1 /*
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2 * This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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5 *
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6 * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V.
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7 */
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8
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9 import java.sql.*;
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10
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11 public class Test_CisValid {
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12 /* Test that after an error has occurred during a transaction, one can
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13 * still test if the connection is valid or not.
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14 * The function Connection.isValid() should only return TRUE or FALSE. It
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15 * shall never alter the state of this connection */
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16 public static void main(String[] args) throws Exception {
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17 Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
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18 Connection conn = DriverManager.getConnection(args[0]);
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19 Statement stmt = conn.createStatement();
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20
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21 try {
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22 conn.setAutoCommit(false); // start a transaction
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23 stmt.execute("SELECT COUNT(*) FROM doesnotexist;"); // let's trigger an error
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24 } catch (SQLException e) {
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25 // e.printStackTrace();
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26 System.err.println("Expected error: " + e);
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27
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28 try {
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29 // test calling conn.isValid()
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30 System.out.println("Validating connection: conn.isValid? " + conn.isValid(30));
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31 // Can we rollback on this connection without causing an error?
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32 conn.rollback();
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33 } catch (SQLException e2) {
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34 System.err.println("UnExpected error: " + e2);
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35 }
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36 }
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37
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38 stmt.close();
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39 conn.close();
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40 }
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41 }