package org.apache.archiva.consumers.core;
   
   /*
    * 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.configuration.ArchivaConfiguration;
  import org.apache.archiva.configuration.ConfigurationNames;
  import org.apache.archiva.configuration.FileTypes;
  import org.apache.archiva.consumers.AbstractMonitoredConsumer;
  import org.apache.archiva.consumers.ConsumerException;
  import org.apache.archiva.consumers.KnownRepositoryContentConsumer;
  import org.apache.archiva.model.ArtifactReference;
  import org.apache.archiva.model.ProjectReference;
  import org.apache.archiva.model.VersionedReference;
  import org.apache.archiva.repository.ContentNotFoundException;
  import org.apache.archiva.repository.ManagedRepositoryContent;
  import org.apache.archiva.repository.RepositoryContentFactory;
  import org.apache.archiva.repository.RepositoryException;
  import org.apache.archiva.repository.RepositoryNotFoundException;
  import org.apache.archiva.repository.layout.LayoutException;
  import org.apache.archiva.repository.metadata.MetadataTools;
  import org.apache.archiva.repository.metadata.RepositoryMetadataException;
  import org.apache.archiva.redback.components.registry.Registry;
  import org.apache.archiva.redback.components.registry.RegistryListener;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.context.annotation.Scope;
  import org.springframework.stereotype.Service;
  
  import javax.annotation.PostConstruct;
  import javax.inject.Inject;
  import java.io.File;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.Date;
  import java.util.List;
  
  /**
   * MetadataUpdaterConsumer will create and update the metadata present within the repository.
   *
   *
   */
  @Service( "knownRepositoryContentConsumer#metadata-updater" )
  @Scope( "prototype" )
  public class MetadataUpdaterConsumer
      extends AbstractMonitoredConsumer
      implements KnownRepositoryContentConsumer, RegistryListener
  {
      private Logger log = LoggerFactory.getLogger( MetadataUpdaterConsumer.class );
  
      /**
       * default-value="metadata-updater"
       */
      private String id = "metadata-updater";
  
      /**
       * default-value="Update / Create maven-metadata.xml files"
       */
      private String description = "Update / Create maven-metadata.xml files";
  
      /**
       *
       */
      @Inject
      private RepositoryContentFactory repositoryFactory;
  
      /**
       *
       */
      @Inject
      private MetadataTools metadataTools;
  
      /**
       *
       */
      @Inject
      private ArchivaConfiguration configuration;
  
      /**
       *
       */
      @Inject
     private FileTypes filetypes;
 
     private static final String TYPE_METADATA_BAD_INTERNAL_REF = "metadata-bad-internal-ref";
 
     private static final String TYPE_METADATA_WRITE_FAILURE = "metadata-write-failure";
 
     private static final String TYPE_METADATA_IO = "metadata-io-warning";
 
     private ManagedRepositoryContent repository;
 
     private File repositoryDir;
 
     private List<String> includes = new ArrayList<String>( 0 );
 
     private long scanStartTimestamp = 0;
 
     public String getDescription()
     {
         return description;
     }
 
     public String getId()
     {
         return id;
     }
 
     public void setIncludes( List<String> includes )
     {
         this.includes = includes;
     }
 
     public void beginScan( ManagedRepository repoConfig, Date whenGathered )
         throws ConsumerException
     {
         try
         {
             this.repository = repositoryFactory.getManagedRepositoryContent( repoConfig.getId() );
             this.repositoryDir = new File( repository.getRepoRoot() );
             this.scanStartTimestamp = System.currentTimeMillis();
         }
         catch ( RepositoryNotFoundException e )
         {
             throw new ConsumerException( e.getMessage(), e );
         }
         catch ( RepositoryException e )
         {
             throw new ConsumerException( e.getMessage(), e );
         }
     }
 
     public void beginScan( ManagedRepository repository, Date whenGathered, boolean executeOnEntireRepo )
         throws ConsumerException
     {
         beginScan( repository, whenGathered );
     }
 
     public void completeScan()
     {
         /* do nothing here */
     }
 
     public void completeScan( boolean executeOnEntireRepo )
     {
         completeScan();
     }
 
     public List<String> getExcludes()
     {
         return getDefaultArtifactExclusions();
     }
 
     public List<String> getIncludes()
     {
         return this.includes;
     }
 
     public void processFile( String path )
         throws ConsumerException
     {
         // Ignore paths like .index etc
         if ( !path.startsWith( "." ) )
         {
             try
             {
                 ArtifactReference artifact = repository.toArtifactReference( path );
                 updateVersionMetadata( artifact, path );
                 updateProjectMetadata( artifact, path );
             }
             catch ( LayoutException e )
             {
                 log.info( "Not processing path that is not an artifact: {} ({})", path, e.getMessage() );
             }
         }
     }
 
     public void processFile( String path, boolean executeOnEntireRepo )
         throws Exception
     {
         processFile( path );
     }
 
     private void updateProjectMetadata( ArtifactReference artifact, String path )
     {
         ProjectReference projectRef = new ProjectReference();
         projectRef.setGroupId( artifact.getGroupId() );
         projectRef.setArtifactId( artifact.getArtifactId() );
 
         try
         {
             String metadataPath = this.metadataTools.toPath( projectRef );
 
             File projectMetadata = new File( this.repositoryDir, metadataPath );
 
             if ( projectMetadata.exists() && ( projectMetadata.lastModified() >= this.scanStartTimestamp ) )
             {
                 // This metadata is up to date. skip it.
                 log.debug( "Skipping uptodate metadata: {}", this.metadataTools.toPath( projectRef ) );
                 return;
             }
 
             metadataTools.updateMetadata( this.repository, projectRef );
             log.debug( "Updated metadata: {}", this.metadataTools.toPath( projectRef ) );
         }
         catch ( LayoutException e )
         {
             triggerConsumerWarning( TYPE_METADATA_BAD_INTERNAL_REF,
                                     "Unable to convert path [" + path + "] to an internal project reference: "
                                         + e.getMessage() );
         }
         catch ( RepositoryMetadataException e )
         {
             triggerConsumerError( TYPE_METADATA_WRITE_FAILURE,
                                   "Unable to write project metadata for artifact [" + path + "]: " + e.getMessage() );
         }
         catch ( IOException e )
         {
             triggerConsumerWarning( TYPE_METADATA_IO,
                                     "Project metadata not written due to IO warning: " + e.getMessage() );
         }
         catch ( ContentNotFoundException e )
         {
             triggerConsumerWarning( TYPE_METADATA_IO,
                                     "Project metadata not written because no versions were found to update: "
                                         + e.getMessage() );
         }
     }
 
     private void updateVersionMetadata( ArtifactReference artifact, String path )
     {
         VersionedReference versionRef = new VersionedReference();
         versionRef.setGroupId( artifact.getGroupId() );
         versionRef.setArtifactId( artifact.getArtifactId() );
         versionRef.setVersion( artifact.getVersion() );
 
         try
         {
             String metadataPath = this.metadataTools.toPath( versionRef );
 
             File projectMetadata = new File( this.repositoryDir, metadataPath );
 
             if ( projectMetadata.exists() && ( projectMetadata.lastModified() >= this.scanStartTimestamp ) )
             {
                 // This metadata is up to date. skip it.
                 log.debug( "Skipping uptodate metadata: {}", this.metadataTools.toPath( versionRef ) );
                 return;
             }
 
             metadataTools.updateMetadata( this.repository, versionRef );
             log.debug( "Updated metadata: {}", this.metadataTools.toPath( versionRef ) );
         }
         catch ( LayoutException e )
         {
             triggerConsumerWarning( TYPE_METADATA_BAD_INTERNAL_REF,
                                     "Unable to convert path [" + path + "] to an internal version reference: "
                                         + e.getMessage() );
         }
         catch ( RepositoryMetadataException e )
         {
             triggerConsumerError( TYPE_METADATA_WRITE_FAILURE,
                                   "Unable to write version metadata for artifact [" + path + "]: " + e.getMessage() );
         }
         catch ( IOException e )
         {
             triggerConsumerWarning( TYPE_METADATA_IO,
                                     "Version metadata not written due to IO warning: " + e.getMessage() );
         }
         catch ( ContentNotFoundException e )
         {
             triggerConsumerWarning( TYPE_METADATA_IO,
                                     "Version metadata not written because no versions were found to update: "
                                         + e.getMessage() );
         }
     }
 
     public boolean isPermanent()
     {
         return false;
     }
 
     public void afterConfigurationChange( Registry registry, String propertyName, Object propertyValue )
     {
         if ( ConfigurationNames.isRepositoryScanning( propertyName ) )
         {
             initIncludes();
         }
     }
 
     public void beforeConfigurationChange( Registry registry, String propertyName, Object propertyValue )
     {
         /* do nothing here */
     }
 
     private void initIncludes()
     {
         includes = new ArrayList<String>( filetypes.getFileTypePatterns( FileTypes.ARTIFACTS ) );
     }
 
     @PostConstruct
     public void initialize()
     {
         configuration.addChangeListener( this );
 
         initIncludes();
     }
 }