content: /*
   * Copyright 1999-2019 Alibaba Group Holding Ltd.
   *
   * Licensed 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.alibaba.csp.sentinel.dashboard.repository.metric;
  
  import com.alibaba.csp.sentinel.dashboard.datasource.entity.MetricEntity;
  import org.junit.After;
  import org.junit.Assert;
  import org.junit.Before;
  import org.junit.Test;
  import org.springframework.util.CollectionUtils;
  
  import java.util.ArrayList;
  import java.util.ConcurrentModificationException;
  import java.util.Date;
  import java.util.List;
  import java.util.concurrent.BrokenBarrierException;
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.CyclicBarrier;
  import java.util.concurrent.ExecutionException;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.Executors;
  import java.util.concurrent.TimeUnit;
  import java.util.concurrent.TimeoutException;
  
  import static org.junit.Assert.*;
  
  /**
   * Test cases for {@link InMemoryMetricsRepository}.
   *
   * @author Nick Tan
   */
  public class InMemoryMetricsRepositoryTest {
  
      private final static String DEFAULT_APP = "defaultApp";
      private final static String DEFAULT_RESOURCE = "defaultResource";
      private static final long EXPIRE_TIME = 1000 * 60 * 5L;
  
      private InMemoryMetricsRepository inMemoryMetricsRepository;
      private ExecutorService executorService;
  
      @Before
      public void setUp() throws Exception {
          inMemoryMetricsRepository = new InMemoryMetricsRepository();
          executorService = Executors.newFixedThreadPool(8);
      }
  
      @After
      public void tearDown() {
          executorService.shutdownNow();
      }
  
  
      @Test
      public void testSave() {
          MetricEntity entry = new MetricEntity();
          entry.setApp("testSave");
          entry.setResource("testResource");
          entry.setTimestamp(new Date(System.currentTimeMillis()));
          entry.setPassQps(1L);
          entry.setExceptionQps(1L);
          entry.setBlockQps(0L);
          entry.setSuccessQps(1L);
          inMemoryMetricsRepository.save(entry);
          List<String> resources = inMemoryMetricsRepository.listResourcesOfApp("testSave");
          Assert.assertTrue(resources.size() == 1 && "testResource".equals(resources.get(0)));
      }
  
  
      @Test
      public void testSaveAll() {
          List<MetricEntity> entities = new ArrayList<>(10000);
          for (int i = 0; i < 10000; i++) {
              MetricEntity entry = new MetricEntity();
              entry.setApp("testSaveAll");
              entry.setResource("testResource" + i);
              entry.setTimestamp(new Date(System.currentTimeMillis()));
              entry.setPassQps(1L);
              entry.setExceptionQps(1L);
              entry.setBlockQps(0L);
              entry.setSuccessQps(1L);
              entities.add(entry);
          }
          inMemoryMetricsRepository.saveAll(entities);
          List<String> result = inMemoryMetricsRepository.listResourcesOfApp("testSaveAll");
          Assert.assertTrue(result.size() == entities.size());
      }
  
  
      @Test
      public void testExpireMetric() {
          long now = System.currentTimeMillis();
          MetricEntity expireEntry = new MetricEntity();
          expireEntry.setApp(DEFAULT_APP);
          expireEntry.setResource(DEFAULT_RESOURCE);
          expireEntry.setTimestamp(new Date(now - EXPIRE_TIME - 1L));
          expireEntry.setPassQps(1L);
          expireEntry.setExceptionQps(1L);
          expireEntry.setBlockQps(0L);
          expireEntry.setSuccessQps(1L);
          inMemoryMetricsRepository.save(expireEntry);
  
          MetricEntity entry = new MetricEntity();
          entry.setApp(DEFAULT_APP);
          entry.setResource(DEFAULT_RESOURCE);
          entry.setTimestamp(new Date(now));
          entry.setPassQps(1L);
          entry.setExceptionQps(1L);
          entry.setBlockQps(0L);
          entry.setSuccessQps(1L);
          inMemoryMetricsRepository.save(entry);
  
          List<MetricEntity> list = inMemoryMetricsRepository.queryByAppAndResourceBetween(
                  DEFAULT_APP, DEFAULT_RESOURCE, now - EXPIRE_TIME, now);
  
          assertFalse(CollectionUtils.isEmpty(list));
          assertEquals(1, list.size());
          assertTrue(list.get(0).getTimestamp().getTime() >= now - EXPIRE_TIME && list.get(0).getTimestamp().getTime() <= now);
  
      }
  
  
      @Test
      public void testConcurrentPutAndGet() {
  
          List<CompletableFuture> futures = new ArrayList<>(10000);
          final CyclicBarrier cyclicBarrier = new CyclicBarrier(8);
  
          for (int j = 0; j < 10000; j++) {
              final int finalJ = j;
              futures.add(CompletableFuture.runAsync(() -> {
                          try {
                              cyclicBarrier.await();
                              if (finalJ % 2 == 0) {
                                  batchSave();
                              } else {
                                  inMemoryMetricsRepository.listResourcesOfApp(DEFAULT_APP);
                              }
  
                          } catch (InterruptedException | BrokenBarrierException e) {
                              e.printStackTrace();
                          }
  
                      }, executorService)
              );
          }
  
  
          CompletableFuture all = CompletableFuture.allOf(futures.toArray(new CompletableFuture[0]));
  
          try {
              all.get(10, TimeUnit.SECONDS);
          } catch (InterruptedException e) {
              e.printStackTrace();
          } catch (ExecutionException e) {
              e.getCause().printStackTrace();
              if (e.getCause() instanceof ConcurrentModificationException) {
                  fail("concurrent error occurred");
              } else {
                  fail("unexpected exception");
              }
          } catch (TimeoutException e) {
              fail("allOf future timeout");
          }
      }
  
      private void batchSave() {
          for (int i = 0; i < 100; i++) {
              MetricEntity entry = new MetricEntity();
              entry.setApp(DEFAULT_APP);
              entry.setResource(DEFAULT_RESOURCE);
              entry.setTimestamp(new Date(System.currentTimeMillis()));
              entry.setPassQps(1L);
              entry.setExceptionQps(1L);
              entry.setBlockQps(0L);
              entry.setSuccessQps(1L);
              inMemoryMetricsRepository.save(entry);
          }
      }
  
  
  }