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// Copyright (C) 2012 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.google.gerrit.server.git;
import com.google.common.collect.Sets;
import com.google.gerrit.common.data.GarbageCollectionResult;
import com.google.gerrit.extensions.events.GarbageCollectorListener;
import com.google.gerrit.extensions.registration.DynamicSet;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.config.GcConfig;
import com.google.gerrit.server.extensions.events.AbstractNoNotifyEvent;
import com.google.inject.Inject;
import java.io.PrintWriter;
import java.util.List;
import java.util.Properties;
import java.util.Set;
import org.eclipse.jgit.api.GarbageCollectCommand;
import org.eclipse.jgit.api.Git;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.ConfigConstants;
import org.eclipse.jgit.lib.NullProgressMonitor;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.TextProgressMonitor;
import org.eclipse.jgit.storage.pack.PackConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class GarbageCollection {
private static final Logger log = LoggerFactory.getLogger(GarbageCollection.class);
public static final String LOG_NAME = "gc_log";
private static final Logger gcLog = LoggerFactory.getLogger(LOG_NAME);
private final GitRepositoryManager repoManager;
private final GarbageCollectionQueue gcQueue;
private final GcConfig gcConfig;
private final DynamicSet<GarbageCollectorListener> listeners;
public interface Factory {
GarbageCollection create();
}
@Inject
GarbageCollection(
GitRepositoryManager repoManager,
GarbageCollectionQueue gcQueue,
GcConfig config,
DynamicSet<GarbageCollectorListener> listeners) {
this.repoManager = repoManager;
this.gcQueue = gcQueue;
this.gcConfig = config;
this.listeners = listeners;
}
public GarbageCollectionResult run(List<Project.NameKey> projectNames) {
return run(projectNames, null);
}
public GarbageCollectionResult run(List<Project.NameKey> projectNames, PrintWriter writer) {
return run(projectNames, gcConfig.isAggressive(), writer);
}
public GarbageCollectionResult run(
List<Project.NameKey> projectNames, boolean aggressive, PrintWriter writer) {
GarbageCollectionResult result = new GarbageCollectionResult();
Set<Project.NameKey> projectsToGc = gcQueue.addAll(projectNames);
for (Project.NameKey projectName :
Sets.difference(Sets.newHashSet(projectNames), projectsToGc)) {
result.addError(
new GarbageCollectionResult.Error(
GarbageCollectionResult.Error.Type.GC_ALREADY_SCHEDULED, projectName));
}
for (Project.NameKey p : projectsToGc) {
try (Repository repo = repoManager.openRepository(p)) {
logGcConfiguration(p, repo, aggressive);
print(writer, "collecting garbage for \"" + p + "\":\n");
GarbageCollectCommand gc = Git.wrap(repo).gc();
gc.setAggressive(aggressive);
logGcInfo(p, "before:", gc.getStatistics());
gc.setProgressMonitor(
writer != null ? new TextProgressMonitor(writer) : NullProgressMonitor.INSTANCE);
Properties statistics = gc.call();
logGcInfo(p, "after: ", statistics);
print(writer, "done.\n\n");
fire(p, statistics);
} catch (RepositoryNotFoundException e) {
logGcError(writer, p, e);
result.addError(
new GarbageCollectionResult.Error(
GarbageCollectionResult.Error.Type.REPOSITORY_NOT_FOUND, p));
} catch (Exception e) {
logGcError(writer, p, e);
result.addError(
new GarbageCollectionResult.Error(GarbageCollectionResult.Error.Type.GC_FAILED, p));
} finally {
gcQueue.gcFinished(p);
}
}
return result;
}
private void fire(Project.NameKey p, Properties statistics) {
if (!listeners.iterator().hasNext()) {
return;
}
Event event = new Event(p, statistics);
for (GarbageCollectorListener l : listeners) {
try {
l.onGarbageCollected(event);
} catch (RuntimeException e) {
log.warn("Failure in GarbageCollectorListener", e);
}
}
}
private static void logGcInfo(Project.NameKey projectName, String msg) {
logGcInfo(projectName, msg, null);
}
private static void logGcInfo(Project.NameKey projectName, String msg, Properties statistics) {
StringBuilder b = new StringBuilder();
b.append("[").append(projectName.get()).append("] ");
b.append(msg);
if (statistics != null) {
b.append(" ");
String s = statistics.toString();
if (s.startsWith("{") && s.endsWith("}")) {
s = s.substring(1, s.length() - 1);
}
b.append(s);
}
gcLog.info(b.toString());
}
private static void logGcConfiguration(
Project.NameKey projectName, Repository repo, boolean aggressive) {
StringBuilder b = new StringBuilder();
Config cfg = repo.getConfig();
b.append("gc.aggressive=").append(aggressive).append("; ");
b.append(formatConfigValues(cfg, ConfigConstants.CONFIG_GC_SECTION, null));
for (String subsection : cfg.getSubsections(ConfigConstants.CONFIG_GC_SECTION)) {
b.append(formatConfigValues(cfg, ConfigConstants.CONFIG_GC_SECTION, subsection));
}
if (b.length() == 0) {
b.append("no set");
}
logGcInfo(projectName, "gc config: " + b.toString());
logGcInfo(projectName, "pack config: " + (new PackConfig(repo)).toString());
}
private static String formatConfigValues(Config config, String section, String subsection) {
StringBuilder b = new StringBuilder();
Set<String> names = config.getNames(section, subsection);
for (String name : names) {
String value = config.getString(section, subsection, name);
b.append(section);
if (subsection != null) {
b.append(".").append(subsection);
}
b.append(".");
b.append(name).append("=").append(value);
b.append("; ");
}
return b.toString();
}
private static void logGcError(PrintWriter writer, Project.NameKey projectName, Exception e) {
print(writer, "failed.\n\n");
StringBuilder b = new StringBuilder();
b.append("[").append(projectName.get()).append("]");
gcLog.error(b.toString(), e);
log.error(b.toString(), e);
}
private static void print(PrintWriter writer, String message) {
if (writer != null) {
writer.print(message);
}
}
private static class Event extends AbstractNoNotifyEvent
implements GarbageCollectorListener.Event {
private final Project.NameKey p;
private final Properties statistics;
Event(Project.NameKey p, Properties statistics) {
this.p = p;
this.statistics = statistics;
}
@Override
public String getProjectName() {
return p.get();
}
@Override
public Properties getStatistics() {
return statistics;
}
}
}
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