Line data    Source code

       1             : // Copyright (C) 2018 The Android Open Source Project
       2             : //
       3             : // Licensed under the Apache License, Version 2.0 (the "License");
       4             : // you may not use this file except in compliance with the License.
       5             : // You may obtain a copy of the License at
       6             : //
       7             : // http://www.apache.org/licenses/LICENSE-2.0
       8             : //
       9             : // Unless required by applicable law or agreed to in writing, software
      10             : // distributed under the License is distributed on an "AS IS" BASIS,
      11             : // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      12             : // See the License for the specific language governing permissions and
      13             : // limitations under the License.
      14             : 
      15             : package com.google.gerrit.server.config;
      16             : 
      17             : import com.google.common.collect.ArrayListMultimap;
      18             : import com.google.common.collect.Multimap;
      19             : import com.google.common.flogger.FluentLogger;
      20             : import com.google.gerrit.server.config.ConfigUpdatedEvent.ConfigUpdateEntry;
      21             : import com.google.gerrit.server.config.ConfigUpdatedEvent.UpdateResult;
      22             : import com.google.gerrit.server.plugincontext.PluginSetContext;
      23             : import com.google.inject.Inject;
      24             : import com.google.inject.Singleton;
      25             : 
      26             : /** Issues a configuration reload from the GerritServerConfigProvider and notify all listeners. */
      27             : @Singleton
      28             : public class GerritServerConfigReloader {
      29         138 :   private static final FluentLogger logger = FluentLogger.forEnclosingClass();
      30             : 
      31             :   private final GerritServerConfigProvider configProvider;
      32             :   private final PluginSetContext<GerritConfigListener> configListeners;
      33             : 
      34             :   @Inject
      35             :   GerritServerConfigReloader(
      36             :       GerritServerConfigProvider configProvider,
      37         138 :       PluginSetContext<GerritConfigListener> configListeners) {
      38         138 :     this.configProvider = configProvider;
      39         138 :     this.configListeners = configListeners;
      40         138 :   }
      41             : 
      42             :   /**
      43             :    * Reloads the Gerrit Server Configuration from disk. Synchronized to ensure that one issued
      44             :    * reload is fully completed before a new one starts.
      45             :    */
      46             :   public Multimap<UpdateResult, ConfigUpdateEntry> reloadConfig() {
      47           1 :     logger.atInfo().log("Starting server configuration reload");
      48           1 :     Multimap<UpdateResult, ConfigUpdateEntry> updates =
      49           1 :         fireUpdatedConfigEvent(configProvider.updateConfig());
      50           1 :     logger.atInfo().log("Server configuration reload completed succesfully");
      51           1 :     return updates;
      52             :   }
      53             : 
      54             :   public Multimap<UpdateResult, ConfigUpdateEntry> fireUpdatedConfigEvent(
      55             :       ConfigUpdatedEvent event) {
      56           1 :     Multimap<UpdateResult, ConfigUpdateEntry> updates = ArrayListMultimap.create();
      57           1 :     configListeners.runEach(l -> updates.putAll(l.configUpdated(event)));
      58           1 :     return updates;
      59             :   }
      60             : }