/*
 * 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.ozone.recon.tasks;

/**
 * Common interface for all Recon events that can be processed by the event buffer.
 * This allows the event buffer to handle both OM update events and custom control events.
 */
public interface ReconEvent {
  
  /**
   * Get the type of event for processing logic.
   * @return the event type
   */
  EventType getEventType();
  
  /**
   * Get the number of events contained in this event (for metrics).
   * For OMUpdateEventBatch, this returns the number of OM events.
   * For control events, this typically returns 1.
   * @return the event count
   */
  int getEventCount();

  /**
   * Enum representing the types of events that can be processed by the event buffer.
   */
  enum EventType {
    OM_UPDATE_BATCH,
    TASK_REINITIALIZATION
  }
}
