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annotate tests/Test_Cforkbomb.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 import java.util.*;
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11
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12 public class Test_Cforkbomb {
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13 private static String args[];
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14
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15 static class Worker extends Thread {
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16 private int id;
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17
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18 public Worker(int id) {
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19 this.id = id;
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20 }
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21
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22 public void run() {
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23 try {
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24 System.out.print("Establishing Connection " + id + "...");
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25 Connection con = DriverManager.getConnection(args[0]);
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26 System.out.println(" done...");
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27
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28 // do something with the connection to test if it works
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29 Statement stmt = con.createStatement();
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30 ResultSet rs = stmt.executeQuery("SELECT " + id);
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31 if (!rs.next()) {
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32 System.out.println("thread " + id + " got no response from server :(");
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33 } else {
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34 if (rs.getInt(1) == id) {
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35 System.out.println("thread " + id + ": connection ok");
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36 } else {
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37 System.out.println("thread " + id + ": got garbage: " + rs.getString(1));
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38 }
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39 }
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40
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41 con.close();
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42 } catch (SQLException e) {
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43 System.out.println("thread " + id + " unhappy: " + e.toString());
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44 }
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45 }
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46 }
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47
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48 public static void main(String[] args) throws Exception {
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49 Test_Cforkbomb.args = args;
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50 Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
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51
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52 // just DoS the server full throttle :)
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53 int i;
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54 for (i = 0; i < 200; i++) {
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55 Worker w = new Worker(i);
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56 w.start();
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57 }
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58 }
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59 }