content: /*
   * Copyright 1999-2020 Alibaba Group Holding Ltd.
   *
   * 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.alibaba.nacos.core.remote.grpc;
  
  import java.util.concurrent.atomic.AtomicLong;
  
  /**
   * id generator to server push ack.
   *
   * @author liuzunfei
   * @version $Id: PushAckIdGenerator.java, v 0.1 2020年07月20日 5:49 PM liuzunfei Exp $
   */
  public class PushAckIdGenerator {
      
      private static AtomicLong id = new AtomicLong(0L);
      
      private static final int ID_PREV_REGEN_OFFSET = 1000;
      
      /**
       * get server push id.
       */
      public static long getNextId() {
          if (id.longValue() > Long.MAX_VALUE - ID_PREV_REGEN_OFFSET) {
              id.getAndSet(0L);
          }
          return id.incrementAndGet();
      }
      
  }
  