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annotate tests/Test_Cforkbomb.java @ 925:4dfdb62e3e9d

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Extend JDBC_API_Tester program with optional second startup argument '-skipMALoutput'. This allows the JDBC_API_Tester program to be called to skip the comparing the MAL output of tests which return MAL output such as PLAN, EXPLAIN and TRACE statements. It is intended for internal development use only.
author Martin van Dinther <martin.van.dinther@monetdbsolutions.com>
date Thu, 08 Aug 2024 15:26:28 +0200 (8 months ago)
parents e890195256ac
children d416e9b6b3d0
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1 /*
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2 * SPDX-License-Identifier: MPL-2.0
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3 *
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4 * This Source Code Form is subject to the terms of the Mozilla Public
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5 * License, v. 2.0. If a copy of the MPL was not distributed with this
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6 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
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7 *
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8 * Copyright 2024 MonetDB Foundation;
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9 * Copyright August 2008 - 2023 MonetDB B.V.;
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10 * Copyright 1997 - July 2008 CWI.
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11 */
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13 import java.sql.*;
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14 import java.util.*;
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16 public class Test_Cforkbomb {
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17 private static String args[];
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18
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19 static class Worker extends Thread {
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20 private int id;
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21
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22 public Worker(int id) {
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23 this.id = id;
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24 }
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26 public void run() {
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27 try {
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28 System.out.print("Establishing Connection " + id + "...");
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29 Connection con = DriverManager.getConnection(args[0]);
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30 System.out.println(" done...");
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31
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32 // do something with the connection to test if it works
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33 Statement stmt = con.createStatement();
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34 ResultSet rs = stmt.executeQuery("SELECT " + id);
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35 if (!rs.next()) {
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36 System.out.println("thread " + id + " got no response from server :(");
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37 } else {
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38 if (rs.getInt(1) == id) {
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39 System.out.println("thread " + id + ": connection ok");
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40 } else {
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41 System.out.println("thread " + id + ": got garbage: " + rs.getString(1));
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42 }
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43 }
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45 con.close();
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46 } catch (SQLException e) {
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47 System.out.println("thread " + id + " unhappy: " + e.toString());
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48 }
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49 }
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50 }
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52 public static void main(String[] args) throws Exception {
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53 Test_Cforkbomb.args = args;
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54
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55 // just DoS the server full throttle :)
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56 int i;
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57 for (i = 0; i < 200; i++) {
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58 Worker w = new Worker(i);
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59 w.start();
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60 }
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61 }
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62 }