content: /*
   * 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.asterix.active;
  
  import java.util.concurrent.TimeUnit;
  
  import org.apache.asterix.active.message.ActiveManagerMessage;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  
  public interface IActiveRuntime {
  
      /**
       * @return the unique runtime id associated with the active runtime
       */
      ActiveRuntimeId getRuntimeId();
  
      /**
       * Stops the running activity
       *
       * @param timeout
       *            time for graceful stop. interrupt the runtime after that
       * @param unit
       *            unit of the timeout
       *
       * @throws HyracksDataException
       * @throws InterruptedException
       */
      void stop(long timeout, TimeUnit unit) throws HyracksDataException, InterruptedException;
  
      /**
       * @return the runtime stats for monitoring purposes
       */
      default String getStats() {
          return "\"Runtime stats is not available.\"";
      }
  
      default void handleGenericEvent(ActiveManagerMessage event) throws HyracksDataException {
          throw new IllegalStateException("generic events not supported for runtime " + getRuntimeId());
      }
  }
  