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
   * <p>
   * http://www.apache.org/licenses/LICENSE-2.0
   * <p>
   * 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.atlas.pc;
  
  import org.apache.commons.lang3.RandomUtils;
  import org.testng.annotations.Test;
  
  import java.util.concurrent.BlockingQueue;
  
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertNotNull;
  import static org.testng.Assert.assertNull;
  
  public class StatusReporterTest {
      @Test
      public void statusReporting() throws InterruptedException {
          final int                                           maxItems       = 50;
          WorkItemBuilder<WorkItemConsumer<Integer>, Integer> cb             = new IntegerConsumerBuilder();
          WorkItemManager<Integer, WorkItemConsumer<Integer>> wi             = getWorkItemManger(cb, 5);
          StatusReporter<Integer, Integer>                    statusReporter = new StatusReporter<>();
  
          for (int i = 0; i < maxItems; i++) {
              wi.produce(i);
  
              statusReporter.produced(i, i);
  
              extractResults(wi, statusReporter);
          }
  
          wi.drain();
  
          extractResults(wi, statusReporter);
  
          assertEquals(statusReporter.ack().intValue(), (maxItems - 1));
  
          wi.shutdown();
  
          assertEquals(statusReporter.getProducedCount(), 0);
          assertEquals(statusReporter.getProcessedCount(), 0);
      }
  
      @Test
      public void reportWithTimeout() throws InterruptedException {
          StatusReporter<Integer, Integer> statusReporter = new StatusReporter<>(2000);
          statusReporter.produced(1, 100);
          statusReporter.produced(2, 200);
  
          statusReporter.processed(2);
  
          Integer ack = statusReporter.ack();
  
          assertNull(ack);
  
          Thread.sleep(3000);
  
          ack = statusReporter.ack();
  
          assertNotNull(ack);
          assertEquals(ack, Integer.valueOf(200));
      }
  
      private WorkItemManager<Integer, WorkItemConsumer<Integer>> getWorkItemManger(WorkItemBuilder<WorkItemConsumer<Integer>, Integer> cb, int numWorkers) {
          return new WorkItemManager<Integer, WorkItemConsumer<Integer>>(cb, "IntegerConsumer", 5, numWorkers, true);
      }
  
      private void extractResults(WorkItemManager<Integer, WorkItemConsumer<Integer>> wi, StatusReporter<Integer, Integer> statusReporter) {
          Object result;
  
          while ((result = wi.getResults().poll()) != null) {
              if (!(result instanceof Integer)) {
                  continue;
              }
  
              statusReporter.processed((Integer) result);
          }
      }
  
      private static class IntegerConsumer extends WorkItemConsumer<Integer> {
          private static final ThreadLocal<Integer> payload = new ThreadLocal<>();
  
          private Integer current;
  
          public IntegerConsumer(BlockingQueue<Integer> queue) {
              super(queue);
          }
  
          @Override
          protected void doCommit() {
              addResult(current);
          }
  
          @Override
          protected void processItem(Integer item) {
              try {
                  this.current = item;
  
                  Thread.sleep(20 + RandomUtils.nextInt(5, 7));
  
                  super.commit();
              } catch (InterruptedException e) {
                  e.printStackTrace();
              }
          }
      }
  
      private static class IntegerConsumerBuilder implements WorkItemBuilder<WorkItemConsumer<Integer>, Integer> {
          @Override
          public IntegerConsumer build(BlockingQueue<Integer> queue) {
              return new IntegerConsumer(queue);
          }
      }
  }
  