content: /*
   * Copyright 1999-2018 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.csp.sentinel.cluster.flow.statistic.metric;
  
  import com.alibaba.csp.sentinel.slots.statistic.base.LeapArray;
  import com.alibaba.csp.sentinel.slots.statistic.base.WindowWrap;
  import com.alibaba.csp.sentinel.slots.statistic.cache.CacheMap;
  import com.alibaba.csp.sentinel.slots.statistic.cache.ConcurrentLinkedHashMapWrapper;
  import com.alibaba.csp.sentinel.util.AssertUtil;
  
  /**
   * @param <C> counter type
   * @author Eric Zhao
   * @since 1.4.0
   */
  public class ClusterParameterLeapArray<C> extends LeapArray<CacheMap<Object, C>> {
  
      private final int maxCapacity;
  
      public ClusterParameterLeapArray(int sampleCount, int intervalInMs, int maxCapacity) {
          super(sampleCount, intervalInMs);
          AssertUtil.isTrue(maxCapacity > 0, "maxCapacity of LRU map should be positive");
          this.maxCapacity = maxCapacity;
      }
  
      @Override
      public CacheMap<Object, C> newEmptyBucket(long timeMillis) {
          return new ConcurrentLinkedHashMapWrapper<>(maxCapacity);
      }
  
      @Override
      protected WindowWrap<CacheMap<Object, C>> resetWindowTo(WindowWrap<CacheMap<Object, C>> w, long startTime) {
          w.resetTo(startTime);
          w.value().clear();
          return w;
      }
  
  }
  