/*

  * 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.benchmark;

 import org.apache.commons.cli.CommandLine;

 import org.apache.giraph.combiner.MinimumDoubleMessageCombiner;

 import org.apache.giraph.conf.GiraphConfiguration;

 import org.apache.giraph.conf.GiraphConstants;

 import org.apache.giraph.edge.ArrayListEdges;

 import org.apache.giraph.edge.HashMapEdges;

 import org.apache.giraph.io.formats.PseudoRandomInputFormatConstants;

 import org.apache.giraph.io.formats.PseudoRandomVertexInputFormat;

 import org.apache.hadoop.util.ToolRunner;

 import org.apache.log4j.Logger;

 import com.google.common.collect.Sets;

 import java.util.Set;

 /**

  * Single-source shortest paths benchmark.

  */

 public class ShortestPathsBenchmark extends GiraphBenchmark {

   /** Class logger */

   private static final Logger LOG =

       Logger.getLogger(ShortestPathsBenchmark.class);

   /** Option for OutEdges class */

   private static final BenchmarkOption EDGES_CLASS = new BenchmarkOption(

       "c", "edgesClass", true,

       "Vertex edges class (0 for HashMapEdges, 1 for ArrayListEdges)");

   /** Option for not using combiner */

   private static final BenchmarkOption NO_COMBINER = new BenchmarkOption(

       "nc", "noCombiner", false, "Don't use a combiner");

   @Override

   public Set<BenchmarkOption> getBenchmarkOptions() {

     return Sets.newHashSet(BenchmarkOption.VERTICES,

         BenchmarkOption.EDGES_PER_VERTEX, EDGES_CLASS, NO_COMBINER);

   }

   @Override

   protected void prepareConfiguration(GiraphConfiguration conf,

       CommandLine cmd) {

     conf.setComputationClass(ShortestPathsComputation.class);

     if (EDGES_CLASS.getOptionIntValue(cmd, 1) == 1) {

       conf.setOutEdgesClass(ArrayListEdges.class);

     } else {

       conf.setOutEdgesClass(HashMapEdges.class);

     }

     LOG.info("Using class " + GiraphConstants.COMPUTATION_CLASS.get(conf));

     conf.setVertexInputFormatClass(PseudoRandomVertexInputFormat.class);

     if (!NO_COMBINER.optionTurnedOn(cmd)) {

       conf.setMessageCombinerClass(MinimumDoubleMessageCombiner.class);

     }

     conf.setLong(PseudoRandomInputFormatConstants.AGGREGATE_VERTICES,

         BenchmarkOption.VERTICES.getOptionLongValue(cmd));

     conf.setLong(PseudoRandomInputFormatConstants.EDGES_PER_VERTEX,

         BenchmarkOption.EDGES_PER_VERTEX.getOptionLongValue(cmd));

   }

   /**

    * Execute the benchmark.

    *

    * @param args Typically the command line arguments.

    * @throws Exception Any exception from the computation.

    */

   public static void main(final String[] args) throws Exception {

     System.exit(ToolRunner.run(new ShortestPathsBenchmark(), args));

   }

 }