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.example.resume.strategies.kafka.fileset;
  
  import java.io.File;
  
  import org.apache.camel.Exchange;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.example.resume.strategies.kafka.KafkaUtil;
  import org.apache.camel.resume.ResumeStrategyConfiguration;
  import org.apache.camel.resume.ResumeStrategyConfigurationBuilder;
  import org.apache.camel.resume.cache.ResumeCache;
  import org.apache.camel.support.resume.Resumables;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class LargeDirectoryRouteBuilder extends RouteBuilder {
      private static final Logger LOG = LoggerFactory.getLogger(LargeDirectoryRouteBuilder.class);
      private final ResumeCache<File> cache;
      private final ResumeStrategyConfigurationBuilder<? extends ResumeStrategyConfigurationBuilder, ? extends ResumeStrategyConfiguration> resumeStrategyConfigurationBuilder;
      private final long delay;
  
      public LargeDirectoryRouteBuilder(ResumeCache<File> cache) {
          this(KafkaUtil.getDefaultKafkaResumeStrategyConfigurationBuilder(), cache);
      }
  
      public LargeDirectoryRouteBuilder(ResumeStrategyConfigurationBuilder<?, ?> resumeStrategyConfigurationBuilder, ResumeCache<File> cache) {
          this(resumeStrategyConfigurationBuilder, cache, 0);
      }
  
      public LargeDirectoryRouteBuilder(ResumeStrategyConfigurationBuilder<? extends ResumeStrategyConfigurationBuilder, ? extends ResumeStrategyConfiguration> resumeStrategyConfigurationBuilder, ResumeCache<File> cache, long delay) {
          this.resumeStrategyConfigurationBuilder = resumeStrategyConfigurationBuilder;
          this.cache = cache;
          this.delay = delay;
      }
  
      private void process(Exchange exchange) throws InterruptedException {
          File path = exchange.getMessage().getHeader("CamelFilePath", File.class);
          LOG.debug("Processing {}", path.getPath());
          exchange.getMessage().setHeader(Exchange.OFFSET, Resumables.of(path.getParentFile(), path));
  
          if (delay > 0) {
              Thread.sleep(delay);
          }
      }
  
      /**
       * Let's configure the Camel routing rules using Java code...
       */
      public void configure() {
          from("file:{{input.dir}}?noop=true&recursive=true")
                  .resumable().configuration(resumeStrategyConfigurationBuilder.withResumeCache(cache))
                  .process(this::process)
                  .to("file:{{output.dir}}");
      }
  
  }
  