ExploreServiceTwillRunnable.java

/*
 * Copyright © 2014-2015 Cask Data, Inc.
 *
 * 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 co.cask.cdap.data.runtime.main;

import co.cask.cdap.app.store.Store;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.common.conf.Constants;
import co.cask.cdap.common.guice.ConfigModule;
import co.cask.cdap.common.guice.DiscoveryRuntimeModule;
import co.cask.cdap.common.guice.IOModule;
import co.cask.cdap.common.guice.KafkaClientModule;
import co.cask.cdap.common.guice.LocationRuntimeModule;
import co.cask.cdap.common.guice.ZKClientModule;
import co.cask.cdap.common.logging.LoggingContextAccessor;
import co.cask.cdap.common.logging.ServiceLoggingContext;
import co.cask.cdap.common.twill.AbstractMasterTwillRunnable;
import co.cask.cdap.data.runtime.DataFabricModules;
import co.cask.cdap.data.runtime.DataSetsModules;
import co.cask.cdap.data.stream.StreamAdminModules;
import co.cask.cdap.data.view.ViewAdminModules;
import co.cask.cdap.data2.audit.AuditModule;
import co.cask.cdap.explore.executor.ExploreExecutorService;
import co.cask.cdap.explore.guice.ExploreClientModule;
import co.cask.cdap.explore.guice.ExploreRuntimeModule;
import co.cask.cdap.internal.app.store.DefaultStore;
import co.cask.cdap.logging.appender.LogAppenderInitializer;
import co.cask.cdap.logging.guice.LoggingModules;
import co.cask.cdap.metrics.guice.MetricsClientRuntimeModule;
import co.cask.cdap.notifications.feeds.client.NotificationFeedClientModule;
import co.cask.cdap.proto.Id;
import co.cask.cdap.store.DefaultNamespaceStore;
import co.cask.cdap.store.NamespaceStore;
import com.google.common.util.concurrent.Service;
import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Injector;
import org.apache.hadoop.conf.Configuration;
import org.apache.twill.api.TwillContext;
import org.apache.twill.kafka.client.KafkaClientService;
import org.apache.twill.zookeeper.ZKClientService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

/**
 * Service for the Explore module that runs user queries in a Twill runnable.
 * It launches a discoverable HTTP servers, that execute SQL statements.
 */
public class ExploreServiceTwillRunnable extends AbstractMasterTwillRunnable {
  private static final Logger LOG = LoggerFactory.getLogger(ExploreServiceTwillRunnable.class);

  private Injector injector;

  public ExploreServiceTwillRunnable(String name, String cConfName, String hConfName) {
    super(name, cConfName, hConfName);
  }

  @Override
  protected void doInit(TwillContext context) {
    CConfiguration cConf = getCConfiguration();
    Configuration hConf = getConfiguration();

    // NOTE: twill client will try to load all the classes present here - including hive classes but it
    // will fail since Hive classes are not in master classpath, and ignore those classes silently
    injector = Guice.createInjector(
      new ConfigModule(cConf, hConf),
      new IOModule(), new ZKClientModule(),
      new KafkaClientModule(),
      new MetricsClientRuntimeModule().getDistributedModules(),
      new DiscoveryRuntimeModule().getDistributedModules(),
      new LocationRuntimeModule().getDistributedModules(),
      new DataFabricModules().getDistributedModules(),
      new DataSetsModules().getDistributedModules(),
      new LoggingModules().getDistributedModules(),
      new ExploreRuntimeModule().getDistributedModules(),
      new ExploreClientModule(),
      new ViewAdminModules().getDistributedModules(),
      new StreamAdminModules().getDistributedModules(),
      new NotificationFeedClientModule(),
      new AuditModule().getDistributedModules(),
      new AbstractModule() {
        @Override
        protected void configure() {
          bind(Store.class).to(DefaultStore.class);
          bind(NamespaceStore.class).to(DefaultNamespaceStore.class);
        }
      });

    injector.getInstance(LogAppenderInitializer.class).initialize();

    LoggingContextAccessor.setLoggingContext(new ServiceLoggingContext(Id.Namespace.SYSTEM.getId(),
                                                                       Constants.Logging.COMPONENT_NAME,
                                                                       Constants.Service.EXPLORE_HTTP_USER_SERVICE));
    LOG.info("Initializing runnable {}", name);

    // Set the host name to the one provided by Twill
    cConf.set(Constants.Explore.SERVER_ADDRESS, context.getHost().getHostName());
  }

  @Override
  protected void getServices(List<? super Service> services) {
    services.add(injector.getInstance(ZKClientService.class));
    services.add(injector.getInstance(KafkaClientService.class));
    services.add(injector.getInstance(ExploreExecutorService.class));
  }
}