package org.apache.archiva.repository.scanner;
   
   /*
    * 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.
   */
  
  import org.apache.archiva.admin.model.beans.ManagedRepository;
  import org.apache.archiva.common.utils.BaseFile;
  import org.apache.archiva.consumers.InvalidRepositoryContentConsumer;
  import org.apache.archiva.consumers.KnownRepositoryContentConsumer;
  import org.apache.archiva.consumers.functors.ConsumerWantsFilePredicate;
  import org.apache.archiva.repository.scanner.functors.ConsumerProcessFileClosure;
  import org.apache.archiva.repository.scanner.functors.TriggerBeginScanClosure;
  import org.apache.archiva.repository.scanner.functors.TriggerScanCompletedClosure;
  import org.apache.commons.collections.Closure;
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.commons.collections.functors.IfClosure;
  import org.apache.commons.lang.SystemUtils;
  import org.codehaus.plexus.util.DirectoryWalkListener;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import java.io.File;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  /**
   * RepositoryScannerInstance
   */
  public class RepositoryScannerInstance
      implements DirectoryWalkListener
  {
      private Logger log = LoggerFactory.getLogger( RepositoryScannerInstance.class );
  
      /**
       * Consumers that process known content.
       */
      private List<KnownRepositoryContentConsumer> knownConsumers;
  
      /**
       * Consumers that process unknown/invalid content.
       */
      private List<InvalidRepositoryContentConsumer> invalidConsumers;
  
      private ManagedRepository repository;
  
      private RepositoryScanStatistics stats;
  
      private long changesSince = 0;
  
      private ConsumerProcessFileClosure consumerProcessFile;
  
      private ConsumerWantsFilePredicate consumerWantsFile;
  
      private Map<String, Long> consumerTimings;
  
      private Map<String, Long> consumerCounts;
  
      public RepositoryScannerInstance( ManagedRepository repository,
                                        List<KnownRepositoryContentConsumer> knownConsumerList,
                                        List<InvalidRepositoryContentConsumer> invalidConsumerList )
      {
          this.repository = repository;
          this.knownConsumers = knownConsumerList;
          this.invalidConsumers = invalidConsumerList;
  
          consumerTimings = new HashMap<>();
          consumerCounts = new HashMap<>();
  
          this.consumerProcessFile = new ConsumerProcessFileClosure();
          consumerProcessFile.setExecuteOnEntireRepo( true );
          consumerProcessFile.setConsumerTimings( consumerTimings );
          consumerProcessFile.setConsumerCounts( consumerCounts );
  
          this.consumerWantsFile = new ConsumerWantsFilePredicate( repository );
  
          stats = new RepositoryScanStatistics();
          stats.setRepositoryId( repository.getId() );
  
          Closure triggerBeginScan =
              new TriggerBeginScanClosure( repository, new Date( System.currentTimeMillis() ), true );
  
         CollectionUtils.forAllDo( knownConsumerList, triggerBeginScan );
         CollectionUtils.forAllDo( invalidConsumerList, triggerBeginScan );
 
         if ( SystemUtils.IS_OS_WINDOWS )
         {
             consumerWantsFile.setCaseSensitive( false );
         }
     }
 
     public RepositoryScannerInstance( ManagedRepository repository,
                                       List<KnownRepositoryContentConsumer> knownContentConsumers,
                                       List<InvalidRepositoryContentConsumer> invalidContentConsumers,
                                       long changesSince )
     {
         this( repository, knownContentConsumers, invalidContentConsumers );
 
         consumerWantsFile.setChangesSince( changesSince );
 
         this.changesSince = changesSince;
     }
 
     public RepositoryScanStatistics getStatistics()
     {
         return stats;
     }
 
     public Map<String, Long> getConsumerTimings()
     {
         return consumerTimings;
     }
 
     public Map<String, Long> getConsumerCounts()
     {
         return consumerCounts;
     }
 
     @Override
     public void directoryWalkStarting( File basedir )
     {
         log.info( "Walk Started: [{}] {}", this.repository.getId(), this.repository.getLocation() );
         stats.triggerStart();
     }
 
     @Override
     public void directoryWalkStep( int percentage, File file )
     {
         log.debug( "Walk Step: {}, {}", percentage, file );
 
         stats.increaseFileCount();
 
         // consume files regardless - the predicate will check the timestamp
         BaseFile basefile = new BaseFile( repository.getLocation(), file );
 
         // Safety check, if a parallel process removes the file
         if (basefile.exists())
         {
 
             // Timestamp finished points to the last successful scan, not this current one.
             if ( file.lastModified( ) >= changesSince )
             {
                 stats.increaseNewFileCount( );
             }
 
             consumerProcessFile.setBasefile( basefile );
             consumerWantsFile.setBasefile( basefile );
 
             Closure processIfWanted = IfClosure.getInstance( consumerWantsFile, consumerProcessFile );
             CollectionUtils.forAllDo( this.knownConsumers, processIfWanted );
 
             if ( consumerWantsFile.getWantedFileCount( ) <= 0 )
             {
                 // Nothing known processed this file.  It is invalid!
                 CollectionUtils.forAllDo( this.invalidConsumers, consumerProcessFile );
             }
         }
     }
 
     @Override
     public void directoryWalkFinished()
     {
         TriggerScanCompletedClosure scanCompletedClosure = new TriggerScanCompletedClosure( repository, true );
         CollectionUtils.forAllDo( knownConsumers, scanCompletedClosure );
         CollectionUtils.forAllDo( invalidConsumers, scanCompletedClosure );
 
         stats.setConsumerTimings( consumerTimings );
         stats.setConsumerCounts( consumerCounts );
 
         log.info( "Walk Finished: [{}] {}", this.repository.getId(), this.repository.getLocation() );
         stats.triggerFinished();
     }
 
     /**
      * Debug method from DirectoryWalker.
      */
     @Override
     public void debug( String message )
     {
         log.debug( "Repository Scanner: {}", message );
     }
 
     public ManagedRepository getRepository()
     {
         return repository;
     }
 
     public RepositoryScanStatistics getStats()
     {
         return stats;
     }
 
     public long getChangesSince()
     {
         return changesSince;
     }
 }