annotate tests/Test_PSmanycon.java @ 0:a5a898f6886c

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 import java.util.*;
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11
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12 public class Test_PSmanycon {
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13 public static void main(String[] args) throws Exception {
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14 Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
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15 List pss = new ArrayList(100); // Connections go in here
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16
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17 try {
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18 // spawn a lot of Connections, just for fun...
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19 int i;
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20 for (i = 0; i < 50; i++) {
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21 System.out.print("Establishing Connection " + i + "...");
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22 Connection con = DriverManager.getConnection(args[0]);
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23 System.out.print(" done...");
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24
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25 // do something with the connection to test if it works
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26 PreparedStatement pstmt = con.prepareStatement("select " + i);
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27 System.out.println(" alive");
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28
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29 pss.add(pstmt);
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30 }
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31
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32 // now try to nicely execute them
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33 i = 0;
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34 for (Iterator it = pss.iterator(); it.hasNext(); i++) {
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35 PreparedStatement pstmt = (PreparedStatement)(it.next());
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36
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37 // see if the connection still works
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38 System.out.print("Executing PreparedStatement " + i + "...");
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39 if (!pstmt.execute())
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40 throw new Exception("should have seen a ResultSet!");
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41
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42 ResultSet rs = pstmt.getResultSet();
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43 if (!rs.next())
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44 throw new Exception("ResultSet is empty");
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45 System.out.print(" result: " + rs.getString(1));
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46 pstmt.getConnection().close();
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47 System.out.println(", done");
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48
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49 if ((i + 1) % 23 == 0) {
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50 // inject a failed transaction
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51 Connection con = DriverManager.getConnection(args[0]);
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52 Statement stmt = con.createStatement();
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53 try {
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54 int affrows = stmt.executeUpdate("update foo where bar is wrong");
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55 System.out.println("oops, faulty statement just got through :(");
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56 } catch (SQLException e) {
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57 System.out.println("Forced transaction failure");
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58 }
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59 }
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60 }
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61 } catch (SQLException e) {
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62 System.out.println("FAILED! " + e.getMessage());
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63 }
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64 }
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65 }