io.druid.cli.Main Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of druid-services Show documentation
druid-services
There is a newer version: 0.12.3
/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets licenses this file
 * to you 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 io.druid.cli;

import com.google.inject.Injector;
import io.airlift.airline.Cli;
import io.airlift.airline.Help;
import io.airlift.airline.ParseException;
import io.druid.cli.validate.DruidJsonValidator;
import io.druid.guice.ExtensionsConfig;
import io.druid.guice.GuiceInjectors;
import io.druid.initialization.Initialization;

import java.util.Collection;
import java.util.ServiceLoader;

/**
 */
public class Main
{
  static {
    ServiceLoader serviceLoader = ServiceLoader.load(PropertyChecker.class);
    for (PropertyChecker propertyChecker : serviceLoader) {
      propertyChecker.checkProperties(System.getProperties());
    }
  }

  @SuppressWarnings("unchecked")
  public static void main(String[] args)
  {
    final Cli.CliBuilder builder = Cli.builder("druid");

    builder.withDescription("Druid command-line runner.")
           .withDefaultCommand(Help.class)
           .withCommands(Help.class, Version.class);

    builder.withGroup("server")
           .withDescription("Run one of the Druid server types.")
           .withDefaultCommand(Help.class)
           .withCommands(
               CliCoordinator.class, CliHistorical.class, CliBroker.class,
               CliRealtime.class, CliOverlord.class, CliMiddleManager.class,
               CliRouter.class
           );

    builder.withGroup("example")
           .withDescription("Run an example")
           .withDefaultCommand(Help.class)
           .withCommands(CliRealtimeExample.class);

    builder.withGroup("tools")
           .withDescription("Various tools for working with Druid")
           .withDefaultCommand(Help.class)
           .withCommands(
               DruidJsonValidator.class,
               PullDependencies.class,
               CreateTables.class,
               InsertSegment.class
           );

    builder.withGroup("index")
           .withDescription("Run indexing for druid")
           .withDefaultCommand(Help.class)
           .withCommands(CliHadoopIndexer.class);

    builder.withGroup("internal")
           .withDescription("Processes that Druid runs \"internally\", you should rarely use these directly")
           .withDefaultCommand(Help.class)
           .withCommands(CliPeon.class, CliInternalHadoopIndexer.class);

    final Injector injector = GuiceInjectors.makeStartupInjector();
    final ExtensionsConfig config = injector.getInstance(ExtensionsConfig.class);
    final Collection extensionCommands = Initialization.getFromExtensions(
        config,
        CliCommandCreator.class
    );

    for (CliCommandCreator creator : extensionCommands) {
      creator.addCommands(builder);
    }

    final Cli cli = builder.build();
    try {
      final Runnable command = cli.parse(args);
      if (!(command instanceof Help)) { // Hack to work around Help not liking being injected
        injector.injectMembers(command);
      }
      command.run();
    }
    catch (ParseException e) {
      System.out.println("ERROR!!!!");
      System.out.println(e.getMessage());
      System.out.println("===");
      cli.parse(new String[]{"help"}).run();
    }
  }
}