+
−/*
+
− * This Source Code Form is subject to the terms of the Mozilla Public
+
− * License, v. 2.0.  If a copy of the MPL was not distributed with this
+
− * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
− *
+
− * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V.
+
− */
+
−
+
−import java.sql.*;
+
−import java.util.*;
+
−
+
−public class Test_PSmanycon {
+
−	public static void main(String[] args) throws Exception {
+
−		Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
+
−		List pss = new ArrayList(100);	// Connections go in here
+
−
+
−		try {
+
−			// spawn a lot of Connections, just for fun...
+
−			int i;
+
−			for (i = 0; i < 50; i++) {
+
−				System.out.print("Establishing Connection " + i + "...");
+
−				Connection con = DriverManager.getConnection(args[0]);
+
−				System.out.print(" done...");
+
−
+
−				// do something with the connection to test if it works
+
−				PreparedStatement pstmt = con.prepareStatement("select " + i);
+
−				System.out.println(" alive");
+
−
+
−				pss.add(pstmt);
+
−			}
+
−
+
−			// now try to nicely execute them
+
−			i = 0;
+
−			for (Iterator it = pss.iterator(); it.hasNext(); i++) {
+
−				PreparedStatement pstmt = (PreparedStatement)(it.next());
+
−
+
−				// see if the connection still works
+
−				System.out.print("Executing PreparedStatement " + i + "...");
+
−				if (!pstmt.execute())
+
−					throw new Exception("should have seen a ResultSet!");
+
−
+
−				ResultSet rs = pstmt.getResultSet();
+
−				if (!rs.next())
+
−					throw new Exception("ResultSet is empty");
+
−				System.out.print(" result: " + rs.getString(1));
+
−				pstmt.getConnection().close();
+
−				System.out.println(", done");
+
−
+
−				if ((i + 1) % 23 == 0) {
+
−					// inject a failed transaction
+
−					Connection con = DriverManager.getConnection(args[0]);
+
−					Statement stmt = con.createStatement();
+
−					try {
+
−						int affrows = stmt.executeUpdate("update foo where bar is wrong");
+
−						System.out.println("oops, faulty statement just got through :(");
+
−					} catch (SQLException e) {
+
−						System.out.println("Forced transaction failure");
+
−					}
+
−				}
+
−			}
+
−		} catch (SQLException e) {
+
−			System.out.println("FAILED! " + e.getMessage());
+
−		}
+
−	}
+
−}