hugegraph-pd/hg-pd-service/src/main/java/org/apache/hugegraph/pd/util/IdUtil.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.hugegraph.pd.util;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public final class IdUtil {

    private static final byte[] LOCK = new byte[0];

    public static String createMillisStr() {
        return String.valueOf(createMillisId());
    }

    /**
     * Create millisecond style ID;
     *
     * @return
     */
    public static Long createMillisId() {
        synchronized (LOCK) {
            try {
                Thread.sleep(1);
            } catch (InterruptedException e) {
                log.error("Failed to sleep", e);
            }

            return System.currentTimeMillis();
        }

    }
}