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/*
* Copyright © 2016-2018 European Support Limited
*
* Licensed 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.openecomp.sdc.logging.context;
import java.util.UUID;
/**
* Holds a unique ID of the logging entity. Is useful to distinguish between different nodes of the same application. If
* it can be assumed, that the node can be re-started, then the unique ID must be retained on the disk.
*
* @author evitaliy
* @since 04 Mar 2018
*/
@SuppressWarnings({"UseOfSystemOutOrSystemErr", "CallToPrintStackTrace", "squid:S106", "squid:S1148"})
public class InstanceId {
private static final String INSTANCE_ID;
static {
// for some reason Java Preferences API
// https://docs.oracle.com/javase/8/docs/technotes/guides/preferences/overview.html
// didn't work in a Docker container, so for now just generate an ID every time
INSTANCE_ID = UUID.randomUUID().toString();
}
private InstanceId() {
// prevent instantiation
}
/**
* A unique ID of the logging entity.
*
* @return unique logging entity ID
*/
public static String get() {
return INSTANCE_ID;
}
}
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