package org.apache.archiva.policies;
   
   /*
    * 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.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.stereotype.Service;
  
  import java.io.File;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  import java.util.Properties;
  
  /**
   * PropagateErrorsPolicy - a policy applied on error to determine how to treat the error.
   */
  @Service( "downloadErrorPolicy#propagate-errors" )
  public class PropagateErrorsDownloadPolicy
      implements DownloadErrorPolicy
  {
      private Logger log = LoggerFactory.getLogger( PropagateErrorsDownloadPolicy.class );
  
      /**
       * Signifies any error should stop searching for other proxies.
       */
      public static final String STOP = "stop";
  
      /**
       * Propagate errors at the end after all are gathered, if there was no successful download from other proxies.
       */
      public static final String QUEUE = "queue error";
  
      /**
       * Ignore errors and treat as if it were not found.
       */
      public static final String IGNORE = "ignore";
  
      private List<String> options = new ArrayList<>( 3 );
  
      public PropagateErrorsDownloadPolicy()
      {
          options.add( STOP );
          options.add( QUEUE );
          options.add( IGNORE );
      }
  
      @Override
      public boolean applyPolicy( String policySetting, Properties request, File localFile, Exception exception,
                                  Map<String, Exception> previousExceptions )
          throws PolicyConfigurationException
      {
          if ( !options.contains( policySetting ) )
          {
              // Not a valid code.
              throw new PolicyConfigurationException( "Unknown error policy setting [" + policySetting +
                                                          "], valid settings are [" + StringUtils.join(
                  options.iterator(), "," ) + "]" );
          }
  
          if ( IGNORE.equals( policySetting ) )
          {
              // Ignore.
              log.debug( "Error policy set to IGNORE." );
              return false;
          }
  
          String repositoryId = request.getProperty( "remoteRepositoryId" );
          if ( STOP.equals( policySetting ) )
          {
              return true;
          }
  
          if ( QUEUE.equals( policySetting ) )
          {
              previousExceptions.put( repositoryId, exception );
              return true;
          }
  
          throw new PolicyConfigurationException(
              "Unable to process checksum policy of [" + policySetting + "], please file a bug report." );
     }
 
     @Override
     public String getDefaultOption()
     {
         return QUEUE;
     }
 
     @Override
     public String getId()
     {
         return "propagate-errors";
     }
 
     @Override
     public String getName()
     {
         return "On remote error";
     }
 
     @Override
     public List<String> getOptions()
     {
         return options;
     }
 }