content: /*
   * Tencent is pleased to support the open source community by making Angel available.
   *
   * Copyright (C) 2017-2018 THL A29 Limited, a Tencent company. All rights reserved.
   *
   * 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
   *
   * https://opensource.org/licenses/Apache-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.tencent.angel.io.retry;
  
  import com.tencent.angel.utils.PositiveAtomicCounter;
  
  import java.util.List;
  
  public class FailoverInvokerProvider<T> {
  
    private List<T> failoverList;
  
    private PositiveAtomicCounter counter = new PositiveAtomicCounter();
  
    public FailoverInvokerProvider(List<T> failoverList) {
      this.failoverList = failoverList;
    }
  
    public T performceFailover() {
      return failoverList.get(counter.incrementAndGet() % failoverList.size());
    }
  
    public List<T> getFailoverList() {
      return failoverList;
    }
  }