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// Copyright (C) 2010 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.pgm;
import static com.google.gerrit.server.schema.DataSourceProvider.Context.MULTI_USER;
import com.google.gerrit.lifecycle.LifecycleManager;
import com.google.gerrit.lifecycle.LifecycleModule;
import com.google.gerrit.pgm.util.SiteProgram;
import com.google.gerrit.reviewdb.Change;
import com.google.gerrit.reviewdb.PatchSet;
import com.google.gerrit.reviewdb.Project;
import com.google.gerrit.reviewdb.ReviewDb;
import com.google.gerrit.server.ChangeUtil;
import com.google.gerrit.server.config.TrackingFooters;
import com.google.gerrit.server.git.GitRepositoryManager;
import com.google.gerrit.server.git.LocalDiskRepositoryManager;
import com.google.gwtorm.client.OrmException;
import com.google.gwtorm.client.SchemaFactory;
import com.google.inject.Inject;
import com.google.inject.Injector;
import org.eclipse.jgit.errors.IncorrectObjectTypeException;
import org.eclipse.jgit.errors.MissingObjectException;
import org.eclipse.jgit.errors.RepositoryNotFoundException;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.TextProgressMonitor;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.revwalk.RevWalk;
import org.kohsuke.args4j.Option;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/** Scan changes and update the trackingid information for them. */
public class ScanTrackingIds extends SiteProgram {
@Option(name = "--threads", usage = "Number of concurrent threads to run")
private int threads = 2 * Runtime.getRuntime().availableProcessors();
private final LifecycleManager manager = new LifecycleManager();
private final TextProgressMonitor monitor = new TextProgressMonitor();
private List<Change> todo;
private Injector dbInjector;
private Injector gitInjector;
@Inject
private TrackingFooters footers;
@Inject
private GitRepositoryManager gitManager;
@Inject
private SchemaFactory<ReviewDb> database;
@Override
public int run() throws Exception {
if (threads <= 0) {
threads = 1;
}
dbInjector = createDbInjector(MULTI_USER);
gitInjector = dbInjector.createChildInjector(new LifecycleModule() {
@Override
protected void configure() {
bind(GitRepositoryManager.class).to(LocalDiskRepositoryManager.class);
listener().to(LocalDiskRepositoryManager.Lifecycle.class);
}
});
manager.add(dbInjector, gitInjector);
manager.start();
gitInjector.injectMembers(this);
final ReviewDb db = database.open();
try {
todo = db.changes().all().toList();
synchronized (monitor) {
monitor.beginTask("Scanning changes", todo.size());
}
} finally {
db.close();
}
final List<Worker> workers = new ArrayList<Worker>(threads);
for (int tid = 0; tid < threads; tid++) {
Worker t = new Worker();
t.start();
workers.add(t);
}
for (Worker t : workers) {
t.join();
}
synchronized (monitor) {
monitor.endTask();
}
manager.stop();
return 0;
}
private void scan(ReviewDb db, Change change) {
final Project.NameKey project = change.getDest().getParentKey();
final Repository git;
try {
git = gitManager.openRepository(project);
} catch (RepositoryNotFoundException e) {
return;
}
try {
PatchSet ps = db.patchSets().get(change.currentPatchSetId());
if (ps == null || ps.getRevision() == null
|| ps.getRevision().get() == null) {
return;
}
ChangeUtil.updateTrackingIds(db, change, footers, parse(git, ps)
.getFooterLines());
} catch (OrmException error) {
System.err.println("ERR " + error.getMessage());
} catch (IOException error) {
System.err.println("ERR Cannot scan " + change.getId() + ": "
+ error.getMessage());
} finally {
git.close();
}
}
private RevCommit parse(final Repository git, PatchSet ps)
throws MissingObjectException, IncorrectObjectTypeException, IOException {
RevWalk rw = new RevWalk(git);
try {
return rw.parseCommit(ObjectId.fromString(ps.getRevision().get()));
} finally {
rw.release();
}
}
private Change next() {
synchronized (todo) {
if (todo.isEmpty()) {
return null;
}
return todo.remove(todo.size() - 1);
}
}
private class Worker extends Thread {
@Override
public void run() {
ReviewDb db;
try {
db = database.open();
} catch (OrmException e) {
e.printStackTrace();
return;
}
try {
for (;;) {
Change change = next();
if (change == null) {
break;
}
scan(db, change);
synchronized (monitor) {
monitor.update(1);
}
}
} finally {
db.close();
}
}
}
}
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