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.tick;
  
  import backtype.storm.Config;
  import backtype.storm.topology.TopologyBuilder;
  import com.jstorm.example.unittests.utils.JStormUnitTestMetricValidator;
  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 java.util.HashSet;
  import java.util.Map;
  import java.util.Set;
  import static org.junit.Assert.*;
  
  /**
   * @author binyang.dby on 2016/7/21.
   *
   * This test is to check if the tick works correctly with the cycle which
   * is set by the user.
   */
  public class TickTupleTest{
      //note that it is a cycle but not a frequency, it means you will receive a tick tuple every 2 seconds
      public final static int TICK_TUPLE_CYCLE = 2;
      public final static int TICK_TUPLE_BOLT_PARALLELISM = 5;
      private static Logger LOG = LoggerFactory.getLogger(TickTupleTest.class);
  
      @Test
      public void testTickTuple()
      {
          TopologyBuilder topologyBuilder = new TopologyBuilder();
          //the spout is useless in this case, all the methods are empty
          topologyBuilder.setSpout("spout", new TickTupleTestSpout());
          //note that there is no grouping here, the bolt should not receive any tuple from spout
          //I increase the parallelism of the bolt to check if it is correct when we have a
          //parallelism greater than 1.
          topologyBuilder.setBolt("bolt", new TickTupleTestBolt(), TICK_TUPLE_BOLT_PARALLELISM)
                  .addConfiguration(Config.TOPOLOGY_TICK_TUPLE_FREQ_SECS, TICK_TUPLE_CYCLE);
  
          Set<String> userDefineMetrics = new HashSet<String>();
          userDefineMetrics.add("TickTupleTest.TickMeter");
          userDefineMetrics.add("TickTupleTest.NonTickCounter");
  
          JStormUnitTestValidator validator = new JStormUnitTestMetricValidator(userDefineMetrics) {
              @Override
              public boolean validateMetrics(Map<String, Double> metrics) {
                  //there is $TICK_TUPLE_BOLT_PARALLELISM bolts, so the TickMeter need divided by $TICK_TUPLE_BOLT_PARALLELISM
                  double cycle = 1 / (metrics.get("TickTupleTest.TickMeter") / TICK_TUPLE_BOLT_PARALLELISM);
                  LOG.info("TickTupleTest.TickMeter = " + metrics.get("TickTupleTest.TickMeter"));
                  LOG.info("Tick cycle  = " + cycle);
                  assertTrue("The tick cycle should be in range of 0.8*TICK_TUPLE_CYCLE and 1.2*TICK_TUPLE_CYCLE",
                          cycle > 0.9f*TICK_TUPLE_CYCLE && cycle < 1.1f*TICK_TUPLE_CYCLE);
                  assertEquals(0, (int)(metrics.get("TickTupleTest.NonTickCounter").doubleValue()));
  
                  return true;
              }
          };
  
          Config config = new Config();
          config.put(Config.TOPOLOGY_NAME, "TickTupleTest");
  
          JStormUnitTestRunner.submitTopology(topologyBuilder.createTopology(), config, 120, validator);
      }
  }
  