| /* |
| * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| import java.util.Random; |
| |
| /** |
| * Dynamically allocates distinct ports from the ephemeral range 49152-65535 |
| */ |
| class PortAllocator { |
| private final static int LOWER_BOUND = 49152; |
| private final static int UPPER_BOUND = 65535; |
| |
| private final static Random RND = new Random(System.currentTimeMillis()); |
| |
| static int[] allocatePorts(final int numPorts) { |
| int[] ports = new int[numPorts]; |
| for (int i = 0; i < numPorts; i++) { |
| int port = -1; |
| while (port == -1) { |
| port = RND.nextInt(UPPER_BOUND - LOWER_BOUND + 1) + LOWER_BOUND; |
| for (int j = 0; j < i; j++) { |
| if (ports[j] == port) { |
| port = -1; |
| break; |
| } |
| } |
| } |
| ports[i] = port; |
| } |
| return ports; |
| } |
| } |
