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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.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.config.ConfigUtil;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.git.WorkQueue.Executor;
import com.google.gerrit.server.project.ProjectControl;
import com.google.gerrit.server.util.RequestScopePropagator;
import com.google.inject.assistedinject.Assisted;
import com.google.inject.assistedinject.FactoryModuleBuilder;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import com.google.inject.PrivateModule;
import com.google.inject.Provides;
import com.google.inject.Singleton;
import org.eclipse.jgit.lib.Config;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.PreReceiveHook;
import org.eclipse.jgit.transport.ReceiveCommand;
import org.eclipse.jgit.transport.ReceiveCommand.Result;
import org.eclipse.jgit.transport.ReceivePack;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.OutputStream;
import java.util.Collection;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
/** Hook that delegates to {@link ReceiveCommits} in a worker thread. */
public class AsyncReceiveCommits implements PreReceiveHook {
private static final Logger log =
LoggerFactory.getLogger(AsyncReceiveCommits.class);
private static final String TIMEOUT_NAME = "ReceiveCommitsOverallTimeout";
public interface Factory {
AsyncReceiveCommits create(ProjectControl projectControl,
Repository repository);
}
public static class Module extends PrivateModule {
@Override
public void configure() {
install(new FactoryModuleBuilder()
.build(AsyncReceiveCommits.Factory.class));
expose(AsyncReceiveCommits.Factory.class);
// Don't expose the binding for ReceiveCommits.Factory. All callers should
// be using AsyncReceiveCommits.Factory instead.
install(new FactoryModuleBuilder()
.build(ReceiveCommits.Factory.class));
}
@Provides
@Singleton
@Named(TIMEOUT_NAME)
long getTimeoutMillis(@GerritServerConfig final Config cfg) {
return ConfigUtil.getTimeUnit(
cfg, "receive", null, "timeout",
TimeUnit.MINUTES.toMillis(2),
TimeUnit.MILLISECONDS);
}
}
private class Worker implements ProjectRunnable {
private final Collection<ReceiveCommand> commands;
private Worker(final Collection<ReceiveCommand> commands) {
this.commands = commands;
}
@Override
public void run() {
rc.processCommands(commands, progress);
}
@Override
public Project.NameKey getProjectNameKey() {
return rc.getProject().getNameKey();
}
@Override
public String getRemoteName() {
return null;
}
@Override
public boolean hasCustomizedPrint() {
return true;
}
@Override
public String toString() {
return "receive-commits";
}
}
private class MessageSenderOutputStream extends OutputStream {
@Override
public void write(int b) {
rc.getMessageSender().sendBytes(new byte[]{(byte)b});
}
@Override
public void write(byte[] what, int off, int len) {
rc.getMessageSender().sendBytes(what, off, len);
}
@Override
public void write(byte[] what) {
rc.getMessageSender().sendBytes(what);
}
@Override
public void flush() {
rc.getMessageSender().flush();
}
}
private final ReceiveCommits rc;
private final Executor executor;
private final RequestScopePropagator scopePropagator;
private final MultiProgressMonitor progress;
private final long timeoutMillis;
@Inject
AsyncReceiveCommits(final ReceiveCommits.Factory factory,
@ReceiveCommitsExecutor final Executor executor,
final RequestScopePropagator scopePropagator,
@Named(TIMEOUT_NAME) final long timeoutMillis,
@Assisted final ProjectControl projectControl,
@Assisted final Repository repo) {
this.executor = executor;
this.scopePropagator = scopePropagator;
rc = factory.create(projectControl, repo);
rc.getReceivePack().setPreReceiveHook(this);
progress = new MultiProgressMonitor(
new MessageSenderOutputStream(), "Processing changes");
this.timeoutMillis = timeoutMillis;
}
@Override
public void onPreReceive(final ReceivePack rp,
final Collection<ReceiveCommand> commands) {
try {
progress.waitFor(
executor.submit(scopePropagator.wrap(new Worker(commands))),
timeoutMillis, TimeUnit.MILLISECONDS);
} catch (ExecutionException e) {
log.warn(String.format(
"Error in ReceiveCommits while processing changes for project %s",
rc.getProject().getName()), e);
rc.addError("internal error while processing changes " + e.getMessage());
// ReceiveCommits has tried its best to catch errors, so anything at this
// point is very bad.
for (final ReceiveCommand c : commands) {
if (c.getResult() == Result.NOT_ATTEMPTED) {
c.setResult(Result.REJECTED_OTHER_REASON, "internal error");
}
}
} finally {
rc.sendMessages();
}
}
public ReceiveCommits getReceiveCommits() {
return rc;
}
}