pinot-plugins/pinot-metrics/pinot-dropwizard/src/main/java/org/apache/pinot/plugin/metrics/dropwizard/DropwizardGauge.java

/**
 * 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.pinot.plugin.metrics.dropwizard;

import com.codahale.metrics.Gauge;
import java.util.function.Function;
import org.apache.pinot.spi.metrics.PinotGauge;


public class DropwizardGauge<T> implements PinotGauge<T> {

  private final Gauge<T> _gauge;

  public DropwizardGauge(Gauge<T> gauge) {
    _gauge = gauge;
  }

  public DropwizardGauge(Function<Void, T> condition) {
    this(() -> condition.apply(null));
  }

  @Override
  public Object getGauge() {
    return _gauge;
  }

  @Override
  public Object getMetric() {
    return _gauge;
  }

  @Override
  public T value() {
    return _gauge.getValue();
  }
}