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// Copyright (C) 2013 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.gerrit.server.PluginUser;
import com.google.gerrit.server.account.GroupBackend;
import com.google.gerrit.server.config.SitePaths;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.WorkQueue;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Singleton;
import org.eclipse.jgit.errors.ConfigInvalidException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.IOException;
import java.util.List;
@Singleton
public class AutoReloadConfigDecorator implements ReplicationConfig {
private static final Logger log = LoggerFactory
.getLogger(AutoReloadConfigDecorator.class);
private ReplicationFileBasedConfig currentConfig;
private long currentConfigTs;
private final Injector injector;
private final SitePaths site;
private final RemoteSiteUser.Factory remoteSiteUserFactory;
private final PluginUser pluginUser;
private final GitRepositoryManager gitRepositoryManager;
private final GroupBackend groupBackend;
private final WorkQueue workQueue;
@Inject
public AutoReloadConfigDecorator(Injector injector, SitePaths site,
RemoteSiteUser.Factory ruf, PluginUser pu,
GitRepositoryManager grm, GroupBackend gb,
WorkQueue workQueue) throws ConfigInvalidException,
IOException {
this.injector = injector;
this.site = site;
this.remoteSiteUserFactory = ruf;
this.pluginUser = pu;
this.gitRepositoryManager = grm;
this.groupBackend = gb;
this.currentConfig = loadConfig();
this.currentConfigTs = currentConfig.getCfgPath().lastModified();
this.workQueue = workQueue;
}
private ReplicationFileBasedConfig loadConfig()
throws ConfigInvalidException, IOException {
return new ReplicationFileBasedConfig(injector, site,
remoteSiteUserFactory, pluginUser, gitRepositoryManager,
groupBackend);
}
private synchronized boolean isAutoReload() {
return currentConfig.getConfig().getBoolean("gerrit", "autoReload", false);
}
@Override
public synchronized List<Destination> getDestinations(FilterType filterType) {
reloadIfNeeded();
return currentConfig.getDestinations(filterType);
}
private void reloadIfNeeded() {
if (isAutoReload()
&& currentConfig.getCfgPath().lastModified() > currentConfigTs) {
try {
ReplicationFileBasedConfig newConfig = loadConfig();
newConfig.startup(workQueue);
int discarded = currentConfig.shutdown();
this.currentConfig = newConfig;
this.currentConfigTs = currentConfig.getCfgPath().lastModified();
log.info("Configuration reloaded: "
+ currentConfig.getDestinations(FilterType.ALL).size() + " destinations, "
+ discarded + " replication events discarded");
} catch (Exception e) {
log.error(
"Cannot reload replication configuration: keeping existing settings",
e);
return;
}
}
}
@Override
public synchronized boolean isReplicateAllOnPluginStart() {
return currentConfig.isReplicateAllOnPluginStart();
}
@Override
public synchronized boolean isDefaultForceUpdate() {
return currentConfig.isDefaultForceUpdate();
}
@Override
public synchronized boolean isEmpty() {
return currentConfig.isEmpty();
}
@Override
public synchronized int shutdown() {
return currentConfig.shutdown();
}
@Override
public synchronized void startup(WorkQueue workQueue) {
currentConfig.startup(workQueue);
}
}
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