HandleGeneratorImpl.java |
1 /* 2 * Copyright 2000-2001,2004 The Apache Software Foundation. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 /* 18 19 */ 20 21 package org.apache.wsrp4j.util; 22 23 import java.net.InetAddress; 24 import java.util.Random; 25 26 /** 27 * This class implements the HandleGenerator interface. 28 * 29 * @author Stephan Laertz 30 * 31 * @version 1.1 32 * 33 * @see HandleGenerator 34 * 35 */ 36 public class HandleGeneratorImpl implements HandleGenerator { 37 38 private static int counter = 0; 39 40 /** 41 * Private constructor of HandleGeneratorImpl. 42 */ 43 private HandleGeneratorImpl() { 44 } 45 46 /** 47 * Returns an instance of HandleGeneratorImpl. 48 * 49 * @return String representing the new handle. 50 */ 51 public static HandleGeneratorImpl create() { 52 return new HandleGeneratorImpl(); 53 } 54 55 /** 56 * Generates a new handle and returns it as a String. 57 * 58 * @return String representing the new handle. 59 */ 60 synchronized public String generateHandle() { 61 62 String host = null; 63 try { 64 65 host = InetAddress.getLocalHost().getHostAddress().toString(); 66 67 } 68 catch (Exception e) { 69 70 host = Double.toString(new Random(new Random().nextLong()) 71 .nextDouble()); 72 73 } 74 75 StringBuffer handle = new StringBuffer(host); 76 handle.append("_"); 77 handle.append(String.valueOf(System.currentTimeMillis())); 78 handle.append("_"); 79 handle.append(Integer.toString(counter++)); 80 81 return handle.toString(); 82 } 83 84 }