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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.metrics;

/**
 * Contains names for all metrics generated in gobblin-core.
 */
public class MetricNames {

  /**
   * Extractor metrics.
   */
  public static class ExtractorMetrics {
    public static final String RECORDS_READ_METER = "gobblin.extractor.records.read";
    public static final String RECORDS_FAILED_METER = "gobblin.extractor.records.failed";
    // Times extraction of records.
    public static final String EXTRACT_TIMER = "gobblin.extractor.extract.time";
  }

  /**
   * Converter metrics.
   */
  public static class ConverterMetrics {
    public static final String RECORDS_IN_METER = "gobblin.converter.records.in";
    public static final String RECORDS_OUT_METER = "gobblin.converter.records.out";
    // Records in which failed conversion.
    public static final String RECORDS_FAILED_METER = "gobblin.converter.records.failed";
    // Times the generation of the Iterable.
    public static final String CONVERT_TIMER = "gobblin.converter.convert.time";
  }

  /**
   * Fork Operator metrics
   */
  public static class ForkOperatorMetrics {
    public static final String RECORDS_IN_METER = "gobblin.fork.operator.records.in";
    // Counts total number of forks generated (e.g. (true, true, false) adds 2).
    public static final String FORKS_OUT_METER = "gobblin.fork.operator.forks.out";
    // Times the computation of the fork list.
    public static final String FORK_TIMER = "gobblin.fork.operator.fork.time";
  }

  /**
   * Row level policy metrics.
   */
  public static class RowLevelPolicyMetrics {
    public static final String RECORDS_IN_METER = "gobblin.qualitychecker.records.in";
    public static final String RECORDS_PASSED_METER = "gobblin.qualitychecker.records.passed";
    public static final String RECORDS_FAILED_METER = "gobblin.qualitychecker.records.failed";
    // Times the policy decision.
    public static final String CHECK_TIMER = "gobblin.qualitychecker.check.time";
  }

  /**
   * {@link gobblin.writer.DataWriter} metrics.
   */
  public static class DataWriterMetrics {

    /**
     * A {@link com.codahale.metrics.Meter} measuring the number of records given to a {@link gobblin.writer.DataWriter}.
     */
    public static final String RECORDS_IN_METER = "gobblin.writer.records.in";

    /**
     * A {@link com.codahale.metrics.Meter} measuring the number of successful write operations performed by a
     * {@link gobblin.writer.DataWriter}.
     */
    public static final String SUCCESSFUL_WRITES_METER = "gobblin.writer.successful.writes";

    /**
     * A {@link com.codahale.metrics.Meter} measuring the number of failed write operations performed by a
     * {@link gobblin.writer.DataWriter}.
     */
    public static final String FAILED_WRITES_METER = "gobblin.writer.failed.writes";

    /**
     * A {@link com.codahale.metrics.Meter} measuring the number records written by a {@link gobblin.writer.DataWriter}
     * as reported by its {@link gobblin.writer.DataWriter#recordsWritten()} method.
     */
    public static final String RECORDS_WRITTEN_METER = "gobblin.writer.records.written";

    /**
     * A {@link com.codahale.metrics.Meter} measuring the number bytes written by a {@link gobblin.writer.DataWriter} as
     * reported by its {@link gobblin.writer.DataWriter#bytesWritten()} method.
     */
    public static final String BYTES_WRITTEN_METER = "gobblin.writer.bytes.written";

    /**
     * A {@link com.codahale.metrics.Timer} measuring the time taken for each write operation.
     */
    public static final String WRITE_TIMER = "gobblin.writer.write.time";
  }
}