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.camel.component.wal;
  
  import java.util.concurrent.Executors;
  import java.util.concurrent.ScheduledExecutorService;
  import java.util.concurrent.TimeUnit;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A log supervisor that runs in the background executing a task in the background. It is used to flush the data to disk
   * at regular intervals
   */
  public class DefaultLogSupervisor implements LogSupervisor {
      private static final Logger LOG = LoggerFactory.getLogger(DefaultLogSupervisor.class);
      private long interval;
  
      private ScheduledExecutorService scheduledExecutorService;
  
      /**
       * Constructs a new log supervisor
       *
       * @param interval the interval between executions of the task
       */
      public DefaultLogSupervisor(long interval) {
          this(interval, Executors.newScheduledThreadPool(1));
      }
  
      /**
       * Constructs a new log supervisor
       *
       * @param interval                 the interval between executions of the task
       * @param scheduledExecutorService the executor service to use for running the task
       */
      public DefaultLogSupervisor(long interval, ScheduledExecutorService scheduledExecutorService) {
          this.interval = interval;
          this.scheduledExecutorService = scheduledExecutorService;
      }
  
      @Override
      public void start(Runnable runnable) {
          scheduledExecutorService.scheduleAtFixedRate(runnable, 0, interval, TimeUnit.MILLISECONDS);
      }
  
      @Override
      public void stop() {
          scheduledExecutorService.shutdown();
          try {
              if (!scheduledExecutorService.awaitTermination(1, TimeUnit.SECONDS)) {
                  scheduledExecutorService.shutdownNow();
              }
          } catch (InterruptedException e) {
              LOG.error("Failed to shutdown log flusher: {}", e.getMessage(), e);
              Thread.currentThread().interrupt();
          }
      }
  }
  