content: /*
   * Inkless
   * Copyright (C) 2024 - 2025 Aiven OY
   *
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU Affero General Public License as published by
   * the Free Software Foundation, either version 3 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
   */
  package io.aiven.inkless.common.metrics;
  
  import org.apache.kafka.common.metrics.MetricConfig;
  import org.apache.kafka.common.metrics.Sensor;
  import org.apache.kafka.common.metrics.stats.Value;
  
  import java.util.function.Supplier;
  
  /**
   * 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.
   */
  public class MeasurableValue<T extends Number> extends Value {
      private final Supplier<T> value;
  
      public MeasurableValue(final Supplier<T> value) {
          this.value = value;
      }
  
      @Override
      public double measure(final MetricConfig config, final long now) {
          return value.get().doubleValue();
      }
  }
  