src/main/java/com/googlesource/gerrit/plugins/replication/StartCommand.java

// Copyright (C) 2009 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.extensions.annotations.RequiresCapability;
import com.google.gerrit.sshd.CommandMetaData;
import com.google.gerrit.sshd.SshCommand;
import com.google.inject.Inject;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.kohsuke.args4j.Argument;
import org.kohsuke.args4j.Option;

@RequiresCapability(StartReplicationCapability.START_REPLICATION)
@CommandMetaData(
    name = "start",
    description = "Start replication for specific project or all projects")
final class StartCommand extends SshCommand implements PushResultProcessing.SshOutputCommand {
  @Option(name = "--all", usage = "push all known projects")
  private boolean all;

  @Option(name = "--url", metaVar = "SUBSTRING", usage = "substring URL must match (or * to match everything)")
  private String urlMatch;

  @Option(name = "--ref", metaVar = "RefName", usage = "ref to replicate")
  private String refName = PushOne.ALL_REFS;

  private final Set<String> remotesToConsider = new HashSet<>();

  @Option(name = "--remote", metaVar = "REMOTE", usage = "name of remote to replicate to")
  void addRemote(String remote) {
    remotesToConsider.add(remote);
  }

  @Option(name = "--wait", usage = "wait for replication to finish before exiting")
  private boolean wait;

  @Option(name = "--now", usage = "start replication without waiting for replicationDelay")
  private boolean now;

  @Argument(index = 0, multiValued = true, metaVar = "PATTERN", usage = "project name pattern")
  private List<String> projectPatterns = new ArrayList<>(2);

  @Inject private ReplicationStarter replicationStarter;

  private final Object lock = new Object();

  @Override
  protected void run() throws Failure {
    if (all && !projectPatterns.isEmpty()) {
      throw new UnloggedFailure(1, "error: cannot combine --all and PROJECT");
    }

    ReplicationFilter projectFilter =
        all
            ? ReplicationFilter.all()
            : new ReplicationFilter(projectPatterns, Collections.emptyList());

    replicationStarter.start(urlMatch, refName, remotesToConsider, projectFilter, now, wait, this);
  }

  @Override
  public void writeStdOutSync(String message) {
    if (wait) {
      synchronized (lock) {
        stdout.println(message);
        stdout.flush();
      }
    }
  }

  @Override
  public void writeStdErrSync(String message) {
    if (wait) {
      synchronized (lock) {
        stderr.println(message);
        stderr.flush();
      }
    }
  }
}