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.assertj.core.util.Lists;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.Test;
  import org.springframework.util.CollectionUtils;
  
  import java.util.ConcurrentModificationException;
  import java.util.Date;
  import java.util.List;
  import java.util.concurrent.*;
  
  import static org.junit.Assert.*;
  
  /**
   * Test cases for {@link InMemoryMetricsRepository}.
   *
   * @author Nick Tan
   */
  public class InMemoryMetricsRepositoryTest {
  
      private static final String DEFAULT_APP = "default";
      private static final String DEFAULT_EXPIRE_APP = "default_expire_app";
      private static final String DEFAULT_RESOURCE = "test";
      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();
      }
  
      private void testSave() {
          for (int i = 0; i < 1000000; 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);
          }
      }
  
      @Test
      public void testExpireMetric() {
          long now = System.currentTimeMillis();
          MetricEntity expireEntry = new MetricEntity();
          expireEntry.setApp(DEFAULT_EXPIRE_APP);
          expireEntry.setResource(DEFAULT_RESOURCE);
          expireEntry.setTimestamp(new Date(now - EXPIRE_TIME - 10L));
          expireEntry.setPassQps(1L);
          expireEntry.setExceptionQps(1L);
          expireEntry.setBlockQps(0L);
          expireEntry.setSuccessQps(1L);
          inMemoryMetricsRepository.save(expireEntry);
  
          MetricEntity entry = new MetricEntity();
          entry.setApp(DEFAULT_EXPIRE_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_EXPIRE_APP, DEFAULT_RESOURCE, now - 2 * EXPIRE_TIME, now + EXPIRE_TIME);
  
          assertFalse(CollectionUtils.isEmpty(list));
          assertEquals(1, list.size());
      }
  
      @Test
      public void testListResourcesOfApp() {
          // prepare basic test data
          testSave();
          System.out.println( "[" + System.currentTimeMillis() + "] Basic test data ready in testListResourcesOfApp");
  
          List<CompletableFuture> futures = Lists.newArrayList();
  
          // concurrent query resources of app
          final CyclicBarrier cyclicBarrier = new CyclicBarrier(8);
          for (int j = 0; j < 10000; j++) {
              futures.add(
                  CompletableFuture.runAsync(() -> {
                          try {
                              cyclicBarrier.await();
                              inMemoryMetricsRepository.listResourcesOfApp(DEFAULT_APP);
                          } catch (InterruptedException | BrokenBarrierException e) {
                              e.printStackTrace();
                          }
                  }, executorService)
              );
          }
  
          // batch add metric entity
          for (int i = 0; i < 10000; i++) {
              MetricEntity entry = new MetricEntity();
              entry.setApp(DEFAULT_APP);
              entry.setResource(DEFAULT_RESOURCE);
              entry.setTimestamp(new Date(System.currentTimeMillis() - EXPIRE_TIME - 1000L));
              entry.setPassQps(1L);
              entry.setExceptionQps(1L);
              entry.setBlockQps(0L);
              entry.setSuccessQps(1L);
              inMemoryMetricsRepository.save(entry);
          }
  
          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");
          }
      }
  
  }