| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package tests.support; |
| |
| import java.net.DatagramSocket; |
| import java.net.ServerSocket; |
| import java.util.Calendar; |
| import java.util.TimeZone; |
| |
| /** |
| * The port manager is supposed to help finding a free |
| * network port on the machine; however, it uses strange |
| * logic, so leave it to the OS. |
| * |
| * @deprecated Use OS to find free ports. |
| */ |
| public class Support_PortManager { |
| |
| private static int lastAssignedPort = somewhatRandomPort(); |
| private static boolean failedOnce = false; |
| |
| public static synchronized int getNextPort() { |
| if (!failedOnce) { |
| try { |
| ServerSocket ss = new ServerSocket(0); |
| int port = ss.getLocalPort(); |
| |
| ss.close(); |
| return port; |
| } catch (Exception ex) { |
| failedOnce = true; |
| } |
| } |
| return getNextPort_unsafe(); |
| } |
| |
| /** |
| * Returns 1 free ports to be used. |
| */ |
| public static synchronized int getNextPortForUDP() { |
| return getNextPortsForUDP(1)[0]; |
| } |
| |
| /** |
| * Returns the specified number of free ports to be used. |
| */ |
| public static synchronized int[] getNextPortsForUDP(int num) { |
| if (num <= 0) { |
| throw new IllegalArgumentException("Invalid ports number: " + num); |
| } |
| DatagramSocket[] dss = new DatagramSocket[num]; |
| int[] ports = new int[num]; |
| |
| try { |
| for (int i = 0; i < num; ++i) { |
| dss[i] = new DatagramSocket(0); |
| ports[i] = dss[i].getLocalPort(); |
| } |
| } catch (Exception ex) { |
| throw new Error("Unable to get " + num + " ports for UDP: " + ex); |
| } finally { |
| for (int i = 0; i < num; ++i) { |
| if (dss[i] != null) { |
| dss[i].close(); |
| } |
| } |
| } |
| return ports; |
| } |
| |
| public static synchronized int getNextPort_unsafe() { |
| if (++lastAssignedPort > 65534) { |
| lastAssignedPort = 6000; |
| } |
| return lastAssignedPort; |
| } |
| |
| /* |
| * Returns a different port number every 6 seconds or so. The port number |
| * should be about += 100 at each 6 second interval |
| */ |
| private static int somewhatRandomPort() { |
| Calendar c = Calendar.getInstance(TimeZone.getTimeZone("UTC")); |
| int minutes = c.get(Calendar.MINUTE); |
| int seconds = c.get(Calendar.SECOND); |
| |
| return 6000 + (1000 * minutes) + ((seconds / 6) * 100); |
| } |
| |
| } |