/**
 * 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.hadoop.yarn.server.applicationhistoryservice;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.ArrayList;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.ipc.Server;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.service.AbstractService;
import org.apache.hadoop.yarn.api.ApplicationHistoryProtocol;
import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenRequest;
import org.apache.hadoop.yarn.api.protocolrecords.CancelDelegationTokenResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptReportRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptReportResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptsRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationAttemptsResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationReportResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetApplicationsResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetContainerReportRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetContainerReportResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetContainersRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetContainersResponse;
import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenRequest;
import org.apache.hadoop.yarn.api.protocolrecords.GetDelegationTokenResponse;
import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenRequest;
import org.apache.hadoop.yarn.api.protocolrecords.RenewDelegationTokenResponse;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptReport;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ApplicationReport;
import org.apache.hadoop.yarn.api.records.ContainerReport;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.ApplicationAttemptNotFoundException;
import org.apache.hadoop.yarn.exceptions.ApplicationNotFoundException;
import org.apache.hadoop.yarn.exceptions.ContainerNotFoundException;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.ipc.YarnRPC;
import org.apache.hadoop.yarn.server.applicationhistoryservice.metrics.timeline.TimelineMetricConfiguration;

public class ApplicationHistoryClientService extends AbstractService implements
  ApplicationHistoryProtocol {
  private static final Log LOG = LogFactory
    .getLog(ApplicationHistoryClientService.class);
  private ApplicationHistoryManager history;
  private Server server;
  private InetSocketAddress bindAddress;
  private TimelineMetricConfiguration metricConfiguration;

  public ApplicationHistoryClientService(ApplicationHistoryManager history) {
    super("ApplicationHistoryClientService");
    this.history = history;
  }

  public ApplicationHistoryClientService(ApplicationHistoryManager history,
                           TimelineMetricConfiguration metricConfiguration) {
    this(history);
    this.metricConfiguration = metricConfiguration;
  }

  protected void serviceStart() throws Exception {
    Configuration conf = getConfig();
    YarnRPC rpc = YarnRPC.create(conf);
    InetSocketAddress address =
      NetUtils.createSocketAddr(metricConfiguration.getTimelineServiceRpcAddress(),
        YarnConfiguration.DEFAULT_TIMELINE_SERVICE_PORT);

    server =
        rpc.getServer(ApplicationHistoryProtocol.class, this,
          address, conf, null, metricConfiguration.getTimelineMetricsServiceHandlerThreadCount());

    server.start();
    this.bindAddress =
        conf.updateConnectAddr(YarnConfiguration.TIMELINE_SERVICE_ADDRESS,
          server.getListenerAddress());
    LOG.info("Instantiated ApplicationHistoryClientService at "
        + this.bindAddress);

    super.serviceStart();
  }

  @Override
  protected void serviceStop() throws Exception {
    if (server != null) {
      server.stop();
    }
    super.serviceStop();
  }

  @Private
  public ApplicationHistoryProtocol getClientHandler() {
    return this;
  }

  @Private
  public InetSocketAddress getBindAddress() {
    return this.bindAddress;
  }


  @Override
  public CancelDelegationTokenResponse cancelDelegationToken(
    CancelDelegationTokenRequest request) throws YarnException, IOException {
    // TODO Auto-generated method stub
    return null;
  }

  @Override
  public GetApplicationAttemptReportResponse getApplicationAttemptReport(
    GetApplicationAttemptReportRequest request) throws YarnException,
    IOException {
    try {
      GetApplicationAttemptReportResponse response =
        GetApplicationAttemptReportResponse.newInstance(history
          .getApplicationAttempt(request.getApplicationAttemptId()));
      return response;
    } catch (IOException e) {
      throw new ApplicationAttemptNotFoundException(e.getMessage());
    }
  }

  @Override
  public GetApplicationAttemptsResponse getApplicationAttempts(
    GetApplicationAttemptsRequest request) throws YarnException,
    IOException {
    GetApplicationAttemptsResponse response =
      GetApplicationAttemptsResponse
        .newInstance(new ArrayList<ApplicationAttemptReport>(history
          .getApplicationAttempts(request.getApplicationId()).values()));
    return response;
  }

  @Override
  public GetApplicationReportResponse getApplicationReport(
    GetApplicationReportRequest request) throws YarnException, IOException {
    try {
      ApplicationId applicationId = request.getApplicationId();
      GetApplicationReportResponse response =
        GetApplicationReportResponse.newInstance(history
          .getApplication(applicationId));
      return response;
    } catch (IOException e) {
      throw new ApplicationNotFoundException(e.getMessage());
    }
  }

  @Override
  public GetApplicationsResponse getApplications(
    GetApplicationsRequest request) throws YarnException, IOException {
    GetApplicationsResponse response =
      GetApplicationsResponse.newInstance(new ArrayList<ApplicationReport>(
        history.getApplications(request.getLimit()).values()));
    return response;
  }

  @Override
  public GetContainerReportResponse getContainerReport(
    GetContainerReportRequest request) throws YarnException, IOException {
    try {
      GetContainerReportResponse response =
        GetContainerReportResponse.newInstance(history.getContainer(request
          .getContainerId()));
      return response;
    } catch (IOException e) {
      throw new ContainerNotFoundException(e.getMessage());
    }
  }

  @Override
  public GetContainersResponse getContainers(GetContainersRequest request)
    throws YarnException, IOException {
    GetContainersResponse response =
      GetContainersResponse.newInstance(new ArrayList<ContainerReport>(
        history.getContainers(request.getApplicationAttemptId()).values()));
    return response;
  }

  @Override
  public GetDelegationTokenResponse getDelegationToken(
    GetDelegationTokenRequest request) throws YarnException, IOException {
    // TODO Auto-generated method stub
    return null;
  }

  @Override
  public RenewDelegationTokenResponse renewDelegationToken(
    RenewDelegationTokenRequest request) throws YarnException, IOException {
    // TODO Auto-generated method stub
    return null;
  }

}