/*
    * 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.giraph.utils;
  
  import org.apache.giraph.conf.ImmutableClassesGiraphConfiguration;
  import org.apache.giraph.master.MasterObserver;
  import org.apache.giraph.metrics.AggregatedMetrics;
  import org.apache.giraph.partition.PartitionStats;
  import org.apache.giraph.worker.WorkerObserver;
  
  import java.util.List;
  
  /**
   * Logs versions of Giraph dependencies on job start.
   */
  public class LogVersions implements WorkerObserver, MasterObserver {
    @Override
    public void applicationFailed(Exception e) { }
  
    @Override
    public void setConf(ImmutableClassesGiraphConfiguration configuration) { }
  
    @Override
    public ImmutableClassesGiraphConfiguration getConf() {
      return null;
    }
  
    @Override
    public void preLoad() { }
  
    @Override
    public void postSave() { }
  
    @Override
    public void preApplication() {
      GiraphDepVersions.get().logVersionsUsed();
    }
  
    @Override
    public void postApplication() { }
  
    @Override
    public void preSuperstep(long superstep) { }
  
    @Override
    public void postSuperstep(long superstep) { }
  
    @Override
    public void superstepMetricsUpdate(long superstep,
        AggregatedMetrics aggregatedMetrics,
        List<PartitionStats> partitionStatsList) { }
  }