| // 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.inject.Inject; |
| import com.google.inject.Provider; |
| import java.util.List; |
| |
| public class AutoReloadRunnable implements Runnable { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| private final EventBus eventBus; |
| private final Provider<ObservableQueue> queueObserverProvider; |
| private final ConfigParser configParser; |
| private ReplicationConfig loadedConfig; |
| private Provider<ReplicationConfig> replicationConfigProvider; |
| private String loadedConfigVersion; |
| private String lastFailedConfigVersion; |
| |
| @Inject |
| public AutoReloadRunnable( |
| ConfigParser configParser, |
| @MainReplicationConfig Provider<ReplicationConfig> replicationConfigProvider, |
| EventBus eventBus, |
| Provider<ObservableQueue> queueObserverProvider) { |
| this.replicationConfigProvider = replicationConfigProvider; |
| this.loadedConfig = replicationConfigProvider.get(); |
| this.loadedConfigVersion = loadedConfig.getVersion(); |
| this.lastFailedConfigVersion = ""; |
| this.eventBus = eventBus; |
| this.queueObserverProvider = queueObserverProvider; |
| this.configParser = configParser; |
| } |
| |
| @Override |
| public synchronized void run() { |
| String pendingConfigVersion = loadedConfig.getVersion(); |
| ObservableQueue queue = queueObserverProvider.get(); |
| if (pendingConfigVersion.equals(loadedConfigVersion) |
| || pendingConfigVersion.equals(lastFailedConfigVersion) |
| || !queue.isRunning() |
| || queue.isReplaying()) { |
| return; |
| } |
| |
| reload(); |
| } |
| |
| synchronized void reload() { |
| String pendingConfigVersion = loadedConfig.getVersion(); |
| try { |
| ReplicationConfig newConfig = replicationConfigProvider.get(); |
| final List<RemoteConfiguration> newValidDestinations = |
| configParser.parseRemotes(newConfig.getConfig()); |
| loadedConfig = newConfig; |
| loadedConfigVersion = newConfig.getVersion(); |
| lastFailedConfigVersion = ""; |
| eventBus.post(newValidDestinations); |
| } catch (Exception e) { |
| logger.atSevere().withCause(e).log( |
| "Cannot reload replication configuration: keeping existing settings"); |
| lastFailedConfigVersion = pendingConfigVersion; |
| } |
| } |
| } |