content: /*
   * 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.cassandra.sidecar.config;
  
  import java.util.concurrent.ThreadLocalRandom;
  
  import org.apache.cassandra.sidecar.common.server.utils.MillisecondBoundConfiguration;
  
  /**
   * A randomized delta value that adds jitter to the initial delay configuration of a
   * {@link org.apache.cassandra.sidecar.tasks.PeriodicTask}
   */
  public interface RandomInitialDelayDelta
  {
      /**
       * @return the configured value for the initial delay
       */
      MillisecondBoundConfiguration initialDelayRandomDelta();
  
      /**
       * Returns a random delta delay in milliseconds. Internally it uses current's {@link ThreadLocalRandom}
       * to calculate the next long value.
       *
       * @return a random delta delay in milliseconds
       */
      default long randomDeltaDelayMillis()
      {
          long delta = initialDelayRandomDelta().toMillis();
          return delta > 0
                 ? ThreadLocalRandom.current().nextLong(delta)
                 : 0;
      }
  }
  