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Gobblin Ingestion Framework

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/*
 * Copyright (C) 2014-2016 LinkedIn Corp. 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.
 */

package gobblin.policies.count;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import gobblin.configuration.ConfigurationKeys;
import gobblin.configuration.State;
import gobblin.qualitychecker.task.TaskLevelPolicy;


public class RowCountPolicy extends TaskLevelPolicy {
  private static final Logger LOG = LoggerFactory.getLogger(RowCountPolicy.class);
  private final long rowsRead;
  private final long rowsWritten;

  public RowCountPolicy(State state, TaskLevelPolicy.Type type) {
    super(state, type);
    this.rowsRead = state.getPropAsLong(ConfigurationKeys.EXTRACTOR_ROWS_EXPECTED);
    this.rowsWritten = state.getPropAsLong(ConfigurationKeys.WRITER_ROWS_WRITTEN);
  }

  @Override
  public Result executePolicy() {
    if (this.rowsRead == this.rowsWritten) {
      return Result.PASSED;
    } else {
      LOG.warn(this.getClass().getSimpleName() + " fails as read count and write count mismatch: " + this);
      return Result.FAILED;
    }
  }

  @Override
  public String toString() {
    return String.format("RowCountPolicy [rowsRead=%s, rowsWritten=%s]", rowsRead, rowsWritten);
  }
}