/*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF 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 org.apache.giraph.job;

 import com.facebook.swift.codec.ThriftCodecManager;

 import com.facebook.swift.service.ThriftEventHandler;

 import com.facebook.swift.service.ThriftServer;

 import com.facebook.swift.service.ThriftServerConfig;

 import com.facebook.swift.service.ThriftServiceProcessor;

 import org.apache.giraph.conf.GiraphConfiguration;

 import org.apache.giraph.conf.IntConfOption;

 import org.apache.giraph.conf.StrConfOption;

 import java.net.UnknownHostException;

 import java.util.ArrayList;

 import java.util.List;

 import static com.google.common.base.Preconditions.checkNotNull;

 /**

  * Manages the life cycle of the Thrift server started on the client.

  */

 public class ClientThriftServer {

   /**

    * The client can run a Thrift server (e.g. job progress service).

    * This is the host of the Thrift server.

    */

   public static final StrConfOption CLIENT_THRIFT_SERVER_HOST =

       new StrConfOption("giraph.client.thrift.server.host", null,

           "Host on which the client Thrift server runs (if enabled)");

   /**

    * The client can run a Thrift server (e.g. job progress service).

    * This is the port of the Thrift server.

    */

   public static final IntConfOption CLIENT_THRIFT_SERVER_PORT =

       new IntConfOption("giraph.client.thrift.server.port", -1,

           "Port on which the client Thrift server runs (if enabled)");

   /** Thrift server that is intended to run on the client */

   private final ThriftServer clientThriftServer;

   /**

    * Create and start the Thrift server.

    *

    * @param conf Giraph conf to set the host and ports for.

    * @param services Services to start

    */

   public ClientThriftServer(GiraphConfiguration conf,

                             List<?> services) {

     checkNotNull(conf, "conf is null");

     checkNotNull(services, "services is null");

     ThriftServiceProcessor processor =

         new ThriftServiceProcessor(new ThriftCodecManager(),

                                    new ArrayList<ThriftEventHandler>(),

                                    services);

     clientThriftServer =

         new ThriftServer(processor, new ThriftServerConfig());

     clientThriftServer.start();

     try {

       CLIENT_THRIFT_SERVER_HOST.set(

           conf,

           conf.getLocalHostname());

     } catch (UnknownHostException e) {

       throw new IllegalStateException("Unable to get host information", e);

     }

     CLIENT_THRIFT_SERVER_PORT.set(conf, clientThriftServer.getPort());

   }

   /**

    * Stop the Thrift server.

    */

   public void stopThriftServer() {

     this.clientThriftServer.close();

   }

 }