1 /**
2 The contents of this file are subject to the Mozilla Public License Version 1.1
3 (the "License"); you may not use this file except in compliance with the License.
4 You may obtain a copy of the License at http://www.mozilla.org/MPL/
5 Software distributed under the License is distributed on an "AS IS" basis,
6 WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
7 specific language governing rights and limitations under the License.
8
9 The Original Code is "NanoTimeGenerator.java". Description:
10 "Simple ID generator that uses the current timestamp as ID"
11
12 The Initial Developer of the Original Code is University Health Network. Copyright (C)
13 2001. All Rights Reserved.
14
15 Contributor(s): ______________________________________.
16
17 Alternatively, the contents of this file may be used under the terms of the
18 GNU General Public License (the "GPL"), in which case the provisions of the GPL are
19 applicable instead of those above. If you wish to allow use of your version of this
20 file only under the terms of the GPL and not to allow others to use your version
21 of this file under the MPL, indicate your decision by deleting the provisions above
22 and replace them with the notice and other provisions required by the GPL License.
23 If you do not delete the provisions above, a recipient may use your version of
24 this file under either the MPL or the GPL.
25 */
26 package ca.uhn.hl7v2.util.idgenerator;
27
28 /**
29 * ID generator that simply returns the return value of System.nanoTime(). If ID
30 * generation happens too fast, there may be duplicate IDs, therefore the generation
31 * is delayed by 1ms.
32 *
33 * @author Christian Ohr
34 */
35 public class NanoTimeGenerator implements IDGenerator {
36
37 public synchronized String getID() {
38 try {
39 Thread.sleep(1L);
40 } catch (InterruptedException ignored) {
41 }
42 return Long.toString(System.nanoTime());
43 }
44
45 }