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.druid.support.profile;
  
  import java.util.*;
  import java.util.concurrent.locks.ReadWriteLock;
  import java.util.concurrent.locks.ReentrantReadWriteLock;
  
  public class ProfileStat {
      private Map<ProfileEntryKey, ProfileEntryStat> entries = new LinkedHashMap<ProfileEntryKey, ProfileEntryStat>(4);
  
      private ReadWriteLock lock = new ReentrantReadWriteLock();
  
      public Map<ProfileEntryKey, ProfileEntryStat> getEntries() {
          return entries;
      }
  
      public void record(Map<ProfileEntryKey, ProfileEntryReqStat> requestStatsMap) {
          if (requestStatsMap == null) {
              return;
          }
  
          for (Map.Entry<ProfileEntryKey, ProfileEntryReqStat> entry : requestStatsMap.entrySet()) {
              ProfileEntryKey entryKey = entry.getKey();
              ProfileEntryReqStat reqEntryStat = entry.getValue();
  
              ProfileEntryStat entryStat = getProfileEntry(entryKey);
  
              entryStat.addExecuteCount(reqEntryStat.getExecuteCount());
              entryStat.addExecuteTimeNanos(reqEntryStat.getExecuteTimeNanos());
          }
      }
  
      private ProfileEntryStat getProfileEntry(ProfileEntryKey entryKey) {
          lock.readLock().lock();
          try {
              ProfileEntryStat entryStat = entries.get(entryKey);
              if (entryStat != null) {
                  return entryStat;
              }
          } finally {
              lock.readLock().unlock();
          }
  
          lock.writeLock().lock();
          try {
              ProfileEntryStat entryStat = entries.get(entryKey);
              if (entryStat == null) {
                  entries.put(entryKey, new ProfileEntryStat());
                  entryStat = entries.get(entryKey);
              }
              return entryStat;
          } finally {
              lock.writeLock().unlock();
          }
      }
  
      public List<Map<String, Object>> getStatData() {
          List<ProfileEntryStatValue> statValueList = getStatValue(false);
  
          int size = statValueList.size();
          List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(size);
          for (ProfileEntryStatValue profileEntryStatValue : statValueList) {
              list.add(profileEntryStatValue.getData());
          }
  
          return list;
      }
  
      public List<ProfileEntryStatValue> getStatValue(boolean reset) {
          List<ProfileEntryStatValue> list = new ArrayList<ProfileEntryStatValue>();
  
          lock.readLock().lock();
          try {
              for (Map.Entry<ProfileEntryKey, ProfileEntryStat> entry : entries.entrySet()) {
                  ProfileEntryStatValue entryStatValue = entry.getValue().getValue(reset);
                  entry.getKey().fillValue(entryStatValue);
  
                  list.add(entryStatValue);
              }
          } finally {
              lock.readLock().unlock();
          }
  
          Collections.reverse(list);
  
          return list;
      }
  
  }
  