// Copyright (C) 2019 The Android Open Source Project
//
// 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.googlesource.gerrit.plugins.replication;

import com.google.common.eventbus.EventBus;
import com.google.common.flogger.FluentLogger;
import com.google.gerrit.extensions.annotations.PluginData;
import com.google.gerrit.server.config.SitePaths;
import com.google.inject.Inject;
import com.google.inject.Provider;
import com.googlesource.gerrit.plugins.replication.Destination.Factory;
import java.nio.file.Path;

public class AutoReloadRunnable implements Runnable {
  private static final FluentLogger logger = FluentLogger.forEnclosingClass();

  private final SitePaths site;
  private final Factory destinationFactory;
  private final Path pluginDataDir;
  private final EventBus eventBus;
  private final Provider<ReplicationQueue> replicationQueue;

  private ReplicationFileBasedConfig loadedConfig;
  private String loadedConfigVersion;
  private String lastFailedConfigVersion;

  @Inject
  public AutoReloadRunnable(
      ReplicationFileBasedConfig config,
      SitePaths site,
      Destination.Factory destinationFactory,
      @PluginData Path pluginDataDir,
      EventBus eventBus,
      Provider<ReplicationQueue> replicationQueue) {
    this.loadedConfig = config;
    this.loadedConfigVersion = config.getVersion();
    this.lastFailedConfigVersion = "";
    this.site = site;
    this.destinationFactory = destinationFactory;
    this.pluginDataDir = pluginDataDir;
    this.eventBus = eventBus;
    this.replicationQueue = replicationQueue;
  }

  @Override
  public synchronized void run() {
    String pendingConfigVersion = loadedConfig.getVersion();
    ReplicationQueue queue = replicationQueue.get();
    if (!loadedConfig.isShuttingDown()
        && !pendingConfigVersion.equals(loadedConfigVersion)
        && !pendingConfigVersion.equals(lastFailedConfigVersion)
        && queue.isRunning()
        && !queue.isReplaying()) {
      reload();
    }
  }

  synchronized void reload() {
    String pendingConfigVersion = loadedConfig.getVersion();
    try {
      loadedConfig = new ReplicationFileBasedConfig(site, destinationFactory, pluginDataDir);
      loadedConfigVersion = loadedConfig.getVersion();
      lastFailedConfigVersion = "";
      eventBus.post(loadedConfig);
    } catch (Exception e) {
      logger.atSevere().withCause(e).log(
          "Cannot reload replication configuration: keeping existing settings");
      lastFailedConfigVersion = pendingConfigVersion;
    }
  }
}

@@ -2249,17 +2249,16 @@
     if (
-!
 loadedCo
@@ -2279,36 +2279,35 @@
 gDown()%0A        
-&& !
+%7C%7C 
 pendingConfigVer
@@ -2347,20 +2347,19 @@
         
-&& !
+%7C%7C 
 pendingC
@@ -2411,19 +2411,20 @@
         
-&& 
+%7C%7C !
 queue.is
@@ -2445,12 +2445,11 @@
     
-&& !
+%7C%7C 
 queu
@@ -2479,21 +2479,34 @@
   re
-load()
+turn
 ;%0A    %7D
+%0A%0A    reload();
 %0A  %7D

simplify the check for reloading