content: package org.apache.archiva.metadata.repository.stats.model;
  
  /*
   * 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.metadata.repository.MetadataRepository;
  import org.apache.archiva.metadata.repository.MetadataRepositoryException;
  import org.apache.archiva.metadata.repository.RepositorySession;
  
  /**
   *
   * This interface is used for populating statistics data. It should be implemented
   * by metadata store implementations in the MetadataRepository class, if the store
   * implementation can provide a faster implementation than walking the tree.
   *
   * @author Martin Stockhammer
   * @since 2.3
   */
  public interface RepositoryStatisticsProvider
  {
  
      /**
       * Populate the statistics object with the statistics data of this repository.
       *
       *
       * @param repositorySession
       * @param repository The current metadata repository implementation
       * @param repositoryId The repository Id
       * @param statistics The statistics object that should be filled.
       * @throws MetadataRepositoryException Is thrown, if an error occurs while accessing the repository
       */
      void populateStatistics( RepositorySession repositorySession, MetadataRepository repository, String repositoryId, RepositoryStatistics statistics )
          throws MetadataRepositoryException;
  }
  