| /* |
| * |
| * 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 org.apache.qpid.server.util; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.net.ServerSocket; |
| |
| public class PortUtil |
| { |
| public static boolean isPortAvailable(String hostName, int port) |
| { |
| InetSocketAddress socketAddress = null; |
| if ( hostName == null || "".equals(hostName) || "*".equals(hostName) ) |
| { |
| socketAddress = new InetSocketAddress(port); |
| } |
| else |
| { |
| socketAddress = new InetSocketAddress(hostName, port); |
| } |
| |
| ServerSocket serverSocket = null; |
| try |
| { |
| serverSocket = new ServerSocket(); |
| serverSocket.setReuseAddress(true); |
| serverSocket.bind(socketAddress); |
| return true; |
| } |
| catch (IOException e) |
| { |
| return false; |
| } |
| finally |
| { |
| if (serverSocket != null) |
| { |
| try |
| { |
| serverSocket.close(); |
| } |
| catch (IOException e) |
| { |
| throw new RuntimeException("Couldn't close port " + port + " that was created to check its availability", e); |
| } |
| } |
| } |
| } |
| } |