com.epam.deltix.util.id.SimpleIdentifierGenerator Maven / Gradle / Ivy

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/*
 * Copyright 2021 EPAM Systems, Inc
 *
 * See the NOTICE file distributed with this work for additional information
 * regarding copyright ownership. 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 com.epam.deltix.util.id;

import java.util.concurrent.TimeUnit;



public class SimpleIdentifierGenerator implements ResettableIdentifierGenerator {

	private long nextID;

    public SimpleIdentifierGenerator () {
        this( System.currentTimeMillis() % TimeUnit.DAYS.toMillis(1));
    }

    public SimpleIdentifierGenerator(long base) {
	    this.nextID = base;
	}

	@Override
	public synchronized long next() {
		return nextID++;
	}


    @Override
    public synchronized void setNext (long nextId) {
    	if (nextID < nextId) {
    		this.nextID = nextId;
    	}
    }

    @Override
    public void reset() {
        throw new UnsupportedOperationException();
    }

}