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.kafka.controller;
  
  import java.util.EnumSet;
  import java.util.function.Supplier;
  
  import static java.util.concurrent.TimeUnit.MILLISECONDS;
  
  class PeriodicTask {
      /**
       * The name of this periodic task.
       */
      private final String name;
  
      /**
       * The callback for this task. If ControllerResult.response is true, we will schedule the
       * task again after only a very short delay. This is useful if we only finished part of the
       * work we wanted to finish.
       */
      private final Supplier<ControllerResult<Boolean>> op;
  
      /**
       * The period of the task when ControllerResult.response is true, in nanoseconds.
       */
      private final long immediatePeriodNs;
  
      /**
       * The default period of the task when ControllerResult.response is false, in nanoseconds.
       */
      private final long periodNs;
  
      /**
       * The flags used by this periodic task.
       */
      private final EnumSet<PeriodicTaskFlag> flags;
  
      private static final long DEFAULT_IMMEDIATE_PERIOD_NS = MILLISECONDS.toNanos(10);
  
      PeriodicTask(
          String name,
          Supplier<ControllerResult<Boolean>> op,
          long periodNs,
          EnumSet<PeriodicTaskFlag> flags
      ) {
          this.name = name;
          this.op = op;
          this.immediatePeriodNs = DEFAULT_IMMEDIATE_PERIOD_NS;
          this.periodNs = periodNs;
          this.flags = flags;
      }
  
      PeriodicTask(
          String name,
          Supplier<ControllerResult<Boolean>> op,
          long periodNs,
          EnumSet<PeriodicTaskFlag> flags,
          long immediatePeriodNs
      ) {
          this.name = name;
          this.op = op;
          this.immediatePeriodNs = immediatePeriodNs;
          this.periodNs = periodNs;
          this.flags = flags;
      }
  
      String name() {
          return name;
      }
  
      Supplier<ControllerResult<Boolean>> op() {
          return op;
      }
  
      long immediatePeriodNs() {
          return immediatePeriodNs;
      }
  
      long periodNs() {
          return periodNs;
      }
  
      EnumSet<PeriodicTaskFlag> flags() {
          return flags;
      }
  }
  