code: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You 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 org.apache.skywalking.oap.server.core.cache;
  
  import java.io.IOException;
  import java.util.List;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  import java.util.stream.Collectors;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.oap.server.library.util.RunnableWithExceptionProtection;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.analysis.DisableRegister;
  import org.apache.skywalking.oap.server.core.analysis.TimeBucket;
  import org.apache.skywalking.oap.server.core.analysis.manual.networkalias.NetworkAddressAlias;
  import org.apache.skywalking.oap.server.core.profiling.trace.ProfileTaskRecord;
  import org.apache.skywalking.oap.server.core.query.type.ProfileTask;
  import org.apache.skywalking.oap.server.core.storage.StorageModule;
  import org.apache.skywalking.oap.server.core.storage.cache.INetworkAddressAliasDAO;
  import org.apache.skywalking.oap.server.core.storage.profiling.trace.IProfileTaskQueryDAO;
  import org.apache.skywalking.oap.server.library.module.ModuleDefineHolder;
  
  @Slf4j
  public enum CacheUpdateTimer {
      INSTANCE;
  
      private int ttl = 10;
  
      public void start(ModuleDefineHolder moduleDefineHolder, int ttl) {
          log.info("Cache updateServiceInventory timer start");
  
          final long timeInterval = 10;
  
          Executors.newSingleThreadScheduledExecutor()
                   .scheduleAtFixedRate(
                       new RunnableWithExceptionProtection(() -> update(moduleDefineHolder), t -> log
                           .error("Cache update failure.", t)), 1, timeInterval, TimeUnit.SECONDS);
          this.ttl = ttl;
  
      }
  
      private void update(ModuleDefineHolder moduleDefineHolder) {
          updateNetAddressAliasCache(moduleDefineHolder);
          // Profile could be disabled by the OAL script. Only load the task when it is activated.
          if (!DisableRegister.INSTANCE.include(ProfileTaskRecord.INDEX_NAME)) {
              updateProfileTask(moduleDefineHolder);
          }
      }
  
      /**
       * Update the cached data updated in last 1 minutes.
       */
      private void updateNetAddressAliasCache(ModuleDefineHolder moduleDefineHolder) {
          INetworkAddressAliasDAO networkAddressAliasDAO = moduleDefineHolder.find(StorageModule.NAME)
                                                                             .provider()
                                                                             .getService(
                                                                                 INetworkAddressAliasDAO.class);
          NetworkAddressAliasCache addressInventoryCache = moduleDefineHolder.find(CoreModule.NAME)
                                                                             .provider()
                                                                             .getService(NetworkAddressAliasCache.class);
          long loadStartTime;
          if (addressInventoryCache.currentSize() == 0) {
              /**
               * As a new start process, load all known network alias information.
               */
              loadStartTime = TimeBucket.getMinuteTimeBucket(System.currentTimeMillis() - 60_000L * 60 * 24 * ttl);
          } else {
              loadStartTime = TimeBucket.getMinuteTimeBucket(System.currentTimeMillis() - 60_000L * 10);
          }
          List<NetworkAddressAlias> addressInventories = networkAddressAliasDAO.loadLastUpdate(loadStartTime);
  
          addressInventoryCache.load(addressInventories);
      }
  
      /**
       * update all profile task list for each service
       */
      private void updateProfileTask(ModuleDefineHolder moduleDefineHolder) {
          IProfileTaskQueryDAO profileTaskQueryDAO = moduleDefineHolder.find(StorageModule.NAME)
                                                                       .provider()
                                                                       .getService(IProfileTaskQueryDAO.class);
          ProfileTaskCache profileTaskCache = moduleDefineHolder.find(CoreModule.NAME)
                                                                .provider()
                                                                .getService(ProfileTaskCache.class);
          try {
              final List<ProfileTask> taskList = profileTaskQueryDAO.getTaskList(
                  null, null, profileTaskCache.getCacheStartTimeBucket(), profileTaskCache
                      .getCacheEndTimeBucket(), null);
  
              taskList.stream().collect(Collectors.groupingBy(t -> t.getServiceId())).entrySet().stream().forEach(e -> {
                  final String serviceId = e.getKey();
                  final List<ProfileTask> profileTasks = e.getValue();
  
                  profileTaskCache.saveTaskList(serviceId, profileTasks);
              });
          } catch (IOException e) {
              log.warn("Unable to update profile task cache", e);
          }
      }
  }