/*
 * Copyright © 2017 Cask Data, Inc.
 *
 * 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 io.cdap.cdap.etl.api.condition;

/**
 * Represents statistics associated with the each stage in the pipeline.
 */
public interface StageStatistics {

  /**
   * Get the number of records given as an input to the stage.
   *
   * @return number of input records
   */
  long getInputRecordsCount();

  /**
   * Get the number of records generated by the stage.
   *
   * @return number of records generated
   */
  long getOutputRecordsCount();

  /**
   * Get the number of error records generated by the stage.
   *
   * @return number of error records
   */
  long getErrorRecordsCount();
}
