Java AtomicLong generateId()

Description

Creates a unique id.

License

Open Source License

Return

Long unique id

Declaration

private static synchronized Long generateId() 

Method Source Code

//package com.java2s;
/*//from   www .ja  va  2  s.  c  o m
 * Copyright (C) 2005-2016 Alfresco Software Limited.
 *
 * This file is part of Alfresco
 *
 * Alfresco is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Alfresco is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Alfresco. If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.concurrent.atomic.AtomicLong;

public class Main {
    private static AtomicLong id = new AtomicLong(
            System.currentTimeMillis());

    /**
     * Creates a unique id.
     * @return Long unique id
     */
    private static synchronized Long generateId() {
        return id.incrementAndGet();
    }
}

Related

1. createId(final Long baseId)
2. createObjectID()
3. createUniqueFileName(String out)
4. currentDate()
5. generateId()
6. generateRandom()
7. get(T stat, AtomicIntegerFieldUpdater updater, boolean reset)
8. getAndAddCap(AtomicLongFieldUpdater updater, T instance, long n)
9. getAndAddRequest(AtomicLong requested, long n)