// Copyright 2016 Twitter. 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.
// See the License for the specific language governing permissions and
// limitations under the License.

package backtype.storm;

import java.util.Map;

import com.twitter.heron.api.HeronSubmitter;

import backtype.storm.generated.AlreadyAliveException;
import backtype.storm.generated.InvalidTopologyException;
import backtype.storm.generated.StormTopology;
import backtype.storm.utils.ConfigUtils;

/**
 * Use this class to submit topologies to run on the Storm cluster. You should run your program
 * with the "storm jar" command from the command-line, and then use this class to
 * submit your topologies.
 */
public final class StormSubmitter {

  private StormSubmitter() {
  }

  /**
   * Submits a topology to run on the cluster. A topology runs forever or until
   * explicitly killed.
   *
   * @param name the name of the storm.
   * @param stormConfig the topology-specific configuration. See {@link Config}.
   * @param topology the processing to execute.
   * @throws AlreadyAliveException if a topology with this name is already running
   * @throws InvalidTopologyException if an invalid topology was submitted
   */
  public static void submitTopology(
      String name,
      Map<String, Object> stormConfig,
      StormTopology topology) throws AlreadyAliveException, InvalidTopologyException {

    // First do config translation
    com.twitter.heron.api.Config heronConfig = ConfigUtils.translateConfig(stormConfig);

    // Now submit a heron topology
    try {
      HeronSubmitter.submitTopology(name, heronConfig, topology.getStormTopology());
    } catch (com.twitter.heron.api.exception.AlreadyAliveException e) {
      throw new AlreadyAliveException();
    } catch (com.twitter.heron.api.exception.InvalidTopologyException e) {
      throw new InvalidTopologyException();
    }
  }
}