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;
  
  import java.util.Map;
  import java.util.Set;
  import java.util.concurrent.ConcurrentHashMap;
  
  import com.alibaba.csp.sentinel.cluster.flow.statistic.metric.ClusterMetric;
  import com.alibaba.csp.sentinel.cluster.server.config.ClusterServerConfigManager;
  import com.alibaba.csp.sentinel.util.AssertUtil;
  
  /**
   * @author Eric Zhao
   * @since 1.4.0
   */
  public final class ClusterMetricStatistics {
  
      private static final Map<Long, ClusterMetric> METRIC_MAP = new ConcurrentHashMap<>();
  
      public static void clear() {
          METRIC_MAP.clear();
      }
  
      public static void putMetric(long id, ClusterMetric metric) {
          AssertUtil.notNull(metric, "Cluster metric cannot be null");
          METRIC_MAP.put(id, metric);
      }
  
      public static boolean putMetricIfAbsent(long id, ClusterMetric metric) {
          AssertUtil.notNull(metric, "Cluster metric cannot be null");
          if (METRIC_MAP.containsKey(id)) {
              return false;
          }
          METRIC_MAP.put(id, metric);
          return true;
      }
  
      public static void removeMetric(long id) {
          METRIC_MAP.remove(id);
      }
  
      public static ClusterMetric getMetric(long id) {
          return METRIC_MAP.get(id);
      }
  
      public static void resetFlowMetrics() {
          Set<Long> keySet = METRIC_MAP.keySet();
          for (Long id : keySet) {
              METRIC_MAP.put(id, new ClusterMetric(ClusterServerConfigManager.getSampleCount(),
                  ClusterServerConfigManager.getIntervalMs()));
          }
      }
  
      private ClusterMetricStatistics() {}
  }
  