content: /**
   * 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 com.jstorm.example.unittests.trident;
  
  import backtype.storm.Config;
  import backtype.storm.LocalDRPC;
  import backtype.storm.tuple.Fields;
  import backtype.storm.tuple.Values;
  import com.jstorm.example.unittests.utils.JStormUnitTestDRPCValidator;
  import com.jstorm.example.unittests.utils.JStormUnitTestRunner;
  import com.jstorm.example.unittests.utils.JStormUnitTestValidator;
  import org.junit.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import storm.trident.TridentState;
  import storm.trident.TridentTopology;
  import storm.trident.operation.BaseFilter;
  import storm.trident.operation.Consumer;
  import storm.trident.operation.FlatMapFunction;
  import storm.trident.operation.MapFunction;
  import storm.trident.operation.builtin.Count;
  import storm.trident.operation.builtin.FilterNull;
  import storm.trident.operation.builtin.MapGet;
  import storm.trident.operation.builtin.Sum;
  import storm.trident.testing.MemoryMapState;
  import storm.trident.tuple.TridentTuple;
  
  import java.util.*;
  
  import static org.junit.Assert.assertTrue;
  
  /**
   * @author binyang.dby on 2016/7/8.
   *
   * basically the unit test version of the TridentMapExample.
   *
   * @Test pass at 2016/7/19
   */
  public class TridentMapTest
  {
      private static Logger LOG = LoggerFactory.getLogger(TridentMapTest.class);
  
      public final static int SPOUT_CONTENT_TYPES = 5;//there is 5 types of content can spout emit
      public final static int SPOUT_BATCH_SIZE = 3;   //at most 3 batches are emitted each time
      public final static int SPOUT_LIMIT = 1000;     //should be times of (Math.ceil)(SPOUT_CONTENT_TYPES/SPOUT_BATCH_SIZE)
                                                      // to make sure the validator is right
  
      @Test
      public void testTridentMap()
      {
          LocalDRPC localDRPC = new LocalDRPC();
  
          FixedLimitBatchSpout spout = new FixedLimitBatchSpout(SPOUT_LIMIT, new Fields("word"), SPOUT_BATCH_SIZE,
                  new Values("the cow jumped over the moon"),
                  new Values("the man went to the store and bought some candy"),
                  new Values("four score and seven years ago"), new Values("how many apples can you eat"),
                  new Values("to be or not to be the person"));
  
          TridentTopology tridentTopology = new TridentTopology();
          TridentState wordCount = tridentTopology.newStream("spout", spout).parallelismHint(1)
                          .flatMap(new SplitFlatMapFunction()).map(new UpperMapFunction())
                          .filter(new Fields("word"), new WordFilter("THE"))
                          .peek(new LogConsumer()).groupBy(new Fields("word"))
                          .persistentAggregate(new MemoryMapState.Factory(), new Count(), new Fields("count"))
                          .parallelismHint(16);
  
          tridentTopology.newDRPCStream("words", localDRPC)
                          .flatMap(new SplitFlatMapFunction()).groupBy(new Fields("args"))
                          .stateQuery(wordCount, new Fields("args"), new MapGet(), new Fields("result"))
                          .filter(new Fields("result"), new FilterNull())
                          .aggregate(new Fields("result"), new Sum(), new Fields("sum"));
  
          Map config = new HashMap();
          config.put(Config.TOPOLOGY_NAME, "TridentMapTest");
  
          JStormUnitTestValidator validator = new JStormUnitTestDRPCValidator(localDRPC)
          {
              Logger LOG = LoggerFactory.getLogger(JStormUnitTestValidator.class);
  
              @Override
              public boolean validate(Map config) {
                  String queryResult = executeLocalDRPC("words", "THE");
                  queryResult = queryResult.substring(2, queryResult.length() - 2);   //the result is like [[8080]], so remove the [[]]
                  int oneLoopNeedEmits = (int)Math.ceil(SPOUT_CONTENT_TYPES/(float)SPOUT_BATCH_SIZE);        //how many times of emit can finish a loop
                  // of all the spout content
                  int loopTime = SPOUT_LIMIT/oneLoopNeedEmits;                        //the loop time of the LimitFixBatchSpout content
                  int receiveCountOfUpperCase = Integer.valueOf(queryResult);
                  LOG.info("Final receive total " + receiveCountOfUpperCase + " \"THE\" when expected " + (loopTime * 5));
                  boolean isCountOfUpperCaseRight = (receiveCountOfUpperCase == loopTime * 5);    //5 "the" are in one loop
  
                  queryResult = executeLocalDRPC("words", "the tHe thE");            //query the word count of these 3 words total
                  queryResult = queryResult.substring(2, queryResult.length() - 2);
                  int receiveCountOfLowerCase = Integer.valueOf(queryResult);
                  LOG.info("Final receive total " + receiveCountOfLowerCase + " \"the\" and \"tHe\" and \"thE\" " +
                          "when expected " + 0);
                  boolean isCountOfLowerCaseRight = (receiveCountOfLowerCase == 0);  //no the tHe thE should pass the UpperFilter
  
                  return isCountOfUpperCaseRight && isCountOfLowerCaseRight;
              }
          };
  
          try {
              boolean result = JStormUnitTestRunner.submitTopology(tridentTopology.build(), config, 90, validator);
              assertTrue("Topology should pass the validator", result);
          }
          finally {
              localDRPC.shutdown();
          }
      }
  
      private static class SplitFlatMapFunction implements FlatMapFunction
      {
          @Override
          public Iterable<Values> execute(TridentTuple input){
              String[] split = input.getString(0).split(" ");
              List<Values> tuple = new ArrayList<Values>();
              for(String value : split)
                  tuple.add(new Values(value));
              return tuple;
          }
      }
  
      private static class UpperMapFunction implements MapFunction
      {
          @Override
          public Values execute(TridentTuple input){
              return new Values(input.getString(0).toUpperCase());
          }
      }
  
      private static class WordFilter extends BaseFilter
      {
          private String word;
  
          public WordFilter(String word){
              this.word = word;
          }
  
          @Override
          public boolean isKeep(TridentTuple tuple) {
              return tuple.getString(0).equals(word);
          }
      }
  
      private static class LogConsumer implements Consumer
      {
          @Override
          public void accept(TridentTuple input) {
              LOG.info(input.getString(0) + "flow pass the LogConsumer.");
          }
      }
  }
  