gobblin.rest.JobExecutionInfoServer Maven / Gradle / Ivy

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/*
 * Copyright (C) 2014-2016 LinkedIn Corp. All rights reserved.
 *
 * 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.
 */

package gobblin.rest;

import java.net.URI;
import java.util.Properties;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Optional;
import com.google.common.util.concurrent.AbstractIdleService;
import com.google.inject.Guice;
import com.google.inject.Injector;

import com.linkedin.r2.filter.FilterChains;
import com.linkedin.r2.transport.common.bridge.server.TransportDispatcher;
import com.linkedin.r2.transport.http.server.HttpNettyServerFactory;
import com.linkedin.r2.transport.http.server.HttpServer;
import com.linkedin.restli.docgen.DefaultDocumentationRequestHandler;
import com.linkedin.restli.server.DelegatingTransportDispatcher;
import com.linkedin.restli.server.RestLiConfig;
import com.linkedin.restli.server.RestLiServer;
import com.linkedin.restli.server.mock.InjectMockResourceFactory;
import com.linkedin.restli.server.mock.SimpleBeanProvider;
import com.linkedin.restli.server.resources.ResourceFactory;

import gobblin.configuration.ConfigurationKeys;
import gobblin.metastore.JobHistoryStore;
import gobblin.metastore.MetaStoreModule;


/**
 * A server running the Rest.li resource for job execution queries.
 *
 * @author Yinan Li
 */
public class JobExecutionInfoServer extends AbstractIdleService {

  private static final Logger LOGGER = LoggerFactory.getLogger(JobExecutionInfoServer.class);

  private final URI serverUri;
  private final int port;
  private final Properties properties;
  private volatile Optional httpServer;

  public JobExecutionInfoServer(Properties properties) {
    this.properties = properties;

    port = Integer.parseInt(
            properties.getProperty(ConfigurationKeys.REST_SERVER_PORT_KEY, ConfigurationKeys.DEFAULT_REST_SERVER_PORT));
    serverUri = URI.create(String.format("http://%s:%d",
            properties.getProperty(ConfigurationKeys.REST_SERVER_HOST_KEY, ConfigurationKeys.DEFAULT_REST_SERVER_HOST),
            port));
  }

  @Override
  protected void startUp()
      throws Exception {
    // Server port

    // Server configuration
    RestLiConfig config = new RestLiConfig();
    config.addResourcePackageNames(JobExecutionInfoResource.class.getPackage().getName());
    config.setServerNodeUri(serverUri);
    config.setDocumentationRequestHandler(new DefaultDocumentationRequestHandler());

    // Handle dependency injection
    Injector injector = Guice.createInjector(new MetaStoreModule(properties));
    JobHistoryStore jobHistoryStore = injector.getInstance(JobHistoryStore.class);
    SimpleBeanProvider beanProvider = new SimpleBeanProvider();
    beanProvider.add("jobHistoryStore", jobHistoryStore);
    // Use InjectMockResourceFactory to keep this Spring free
    ResourceFactory factory = new InjectMockResourceFactory(beanProvider);

    // Create and start the HTTP server
    TransportDispatcher dispatcher = new DelegatingTransportDispatcher(new RestLiServer(config, factory));
    this.httpServer = Optional.of(new HttpNettyServerFactory(FilterChains.empty()).createServer(port, dispatcher));
    LOGGER.info("Starting the job execution information server");
    this.httpServer.get().start();
  }

  @Override
  protected void shutDown()
      throws Exception {
    if (this.httpServer.isPresent()) {
      LOGGER.info("Stopping the job execution information server");
      this.httpServer.get().stop();
    }
  }

  public URI getServerUri() {
    return serverUri;
  }
}