2 * Copyright © 2016-2018 European Support Limited
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 package org.openecomp.sdc.logging.context;
19 import java.util.UUID;
22 * Holds a unique ID of the logging entity. Is useful to distinguish between different nodes of the same application. If
23 * it can be assumed, that the node can be re-started, then the unique ID must be retained on the disk.
28 @SuppressWarnings({"UseOfSystemOutOrSystemErr", "CallToPrintStackTrace", "squid:S106", "squid:S1148"})
29 public class InstanceId {
31 private static final String INSTANCE_ID;
34 // for some reason Java Preferences API
35 // https://docs.oracle.com/javase/8/docs/technotes/guides/preferences/overview.html
36 // didn't work in a Docker container, so for now just generate an ID every time
37 INSTANCE_ID = UUID.randomUUID().toString();
40 private InstanceId() {
41 // prevent instantiation
45 * A unique ID of the logging entity.
47 * @return unique logging entity ID
49 public static String get() {