org.apache.hadoop.metrics2.MetricsRecordBuilder.java Source code

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Here is the source code for org.apache.hadoop.metrics2.MetricsRecordBuilder.java

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/**
 * 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.metrics2;

import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;

/**
 * The metrics record builder interface
 */
@InterfaceAudience.Public
@InterfaceStability.Evolving
public abstract class MetricsRecordBuilder {
    /**
     * Add a metrics value with metrics information
     * @param info  metadata of the tag
     * @param value of the tag
     * @return self
     */
    public abstract MetricsRecordBuilder tag(MetricsInfo info, String value);

    /**
     * Add an immutable metrics tag object
     * @param tag a pre-made tag object (potentially save an object construction)
     * @return self
     */
    public abstract MetricsRecordBuilder add(MetricsTag tag);

    /**
     * Add a pre-made immutable metric object
     * @param metric  the pre-made metric to save an object construction
     * @return self
     */
    public abstract MetricsRecordBuilder add(AbstractMetric metric);

    /**
     * Set the context tag
     * @param value of the context
     * @return self
     */
    public abstract MetricsRecordBuilder setContext(String value);

    /**
     * Add an integer metric
     * @param info  metadata of the metric
     * @param value of the metric
     * @return self
     */
    public abstract MetricsRecordBuilder addCounter(MetricsInfo info, int value);

    /**
     * Add an long metric
     * @param info  metadata of the metric
     * @param value of the metric
     * @return self
     */
    public abstract MetricsRecordBuilder addCounter(MetricsInfo info, long value);

    /**
     * Add a integer gauge metric
     * @param info  metadata of the metric
     * @param value of the metric
     * @return self
     */
    public abstract MetricsRecordBuilder addGauge(MetricsInfo info, int value);

    /**
     * Add a long gauge metric
     * @param info  metadata of the metric
     * @param value of the metric
     * @return self
     */
    public abstract MetricsRecordBuilder addGauge(MetricsInfo info, long value);

    /**
     * Add a float gauge metric
     * @param info  metadata of the metric
     * @param value of the metric
     * @return self
     */
    public abstract MetricsRecordBuilder addGauge(MetricsInfo info, float value);

    /**
     * Add a double gauge metric
     * @param info  metadata of the metric
     * @param value of the metric
     * @return self
     */
    public abstract MetricsRecordBuilder addGauge(MetricsInfo info, double value);

    /**
     * @return the parent metrics collector object
     */
    public abstract MetricsCollector parent();

    /**
     * Syntactic sugar to add multiple records in a collector in a one liner.
     * @return the parent metrics collector object
     */
    public MetricsCollector endRecord() {
        return parent();
    }
}