content: /*
   * Copyright 2024 Aiven Oy
   *
   * 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.aiven.kafka.tieredstorage.metrics;
  
  import java.util.function.Supplier;
  
  import org.apache.kafka.common.metrics.MetricConfig;
  import org.apache.kafka.common.metrics.Sensor;
  import org.apache.kafka.common.metrics.stats.Value;
  
  /**
   * Implementation of {@link Value} that allows fetching a value from provided {@code Long} {@link Supplier}
   * to avoid unnecessary calls to {@link Sensor#record()} that under the hood has a synchronized block and affects
   * performance because of that.
   */
  class MeasurableValue extends Value {
      private final Supplier<Long> value;
  
      MeasurableValue(final Supplier<Long> value) {
          this.value = value;
      }
  
      @Override
      public double measure(final MetricConfig config, final long now) {
          return value.get();
      }
  }
  