| /* |
| * 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 org.apache.geode.management.internal.beans; |
| |
| import static org.mockito.Mockito.doReturn; |
| import static org.mockito.Mockito.mock; |
| |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.time.Duration; |
| import java.util.Scanner; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| |
| import org.junit.Before; |
| import org.junit.Rule; |
| import org.junit.Test; |
| |
| import org.apache.geode.distributed.internal.InternalDistributedSystem; |
| import org.apache.geode.distributed.internal.ResourceEvent; |
| import org.apache.geode.internal.cache.DiskStoreImpl; |
| import org.apache.geode.internal.cache.DiskStoreStats; |
| import org.apache.geode.internal.cache.InternalCache; |
| import org.apache.geode.test.junit.rules.ConcurrencyRule; |
| import org.apache.geode.test.junit.rules.ServerStarterRule; |
| |
| public class ManagementAdapterTest { |
| |
| private InternalCache cache; |
| private DiskStoreImpl diskStore = mock(DiskStoreImpl.class); |
| private AtomicBoolean raceConditionFound = new AtomicBoolean(false); |
| |
| @Rule |
| public ServerStarterRule serverRule = |
| new ServerStarterRule().withLogFile().withAutoStart(); |
| |
| @Rule |
| public ConcurrencyRule concurrencyRule = new ConcurrencyRule(); |
| |
| @Before |
| public void before() { |
| cache = serverRule.getCache(); |
| doReturn(new DiskStoreStats(cache.getInternalDistributedSystem(), "disk-stats")) |
| .when(diskStore).getStats(); |
| doReturn(new File[] {}).when(diskStore).getDiskDirs(); |
| } |
| |
| @Test |
| public void testHandlingNotificationsConcurrently() { |
| // continuously send cache creation/removal notifications, thread modifying the state |
| Callable<Void> cacheNotifications = () -> { |
| if (raceConditionFound.get() == Boolean.FALSE) { |
| try { |
| InternalDistributedSystem ids = cache.getInternalDistributedSystem(); |
| ids.handleResourceEvent(ResourceEvent.CACHE_REMOVE, cache); |
| Thread.sleep(10); |
| ids.handleResourceEvent(ResourceEvent.CACHE_CREATE, cache); |
| Thread.sleep(10); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| return null; |
| }; |
| |
| // continuously send disk creation/removal, thread relying on state |
| Callable<Void> diskNotifications = () -> { |
| if (raceConditionFound.get() == Boolean.FALSE) { |
| try { |
| InternalDistributedSystem ids = cache.getInternalDistributedSystem(); |
| ids.handleResourceEvent(ResourceEvent.DISKSTORE_CREATE, diskStore); |
| Thread.sleep(5); |
| ids.handleResourceEvent(ResourceEvent.DISKSTORE_REMOVE, diskStore); |
| Thread.sleep(5); |
| } catch (InterruptedException e) { |
| e.printStackTrace(); |
| } |
| } |
| return null; |
| }; |
| |
| // scans server log to see if there is null pointer due to caused by cache removal. |
| Callable<Boolean> scanLogs = () -> { |
| if (raceConditionFound.get() == Boolean.FALSE) { |
| try { |
| File logFile = new File("server.log"); |
| Scanner scanner = new Scanner(logFile); |
| while (scanner.hasNextLine()) { |
| final String lineFromFile = scanner.nextLine(); |
| if (lineFromFile.contains("java.lang.NullPointerException")) { |
| raceConditionFound.set(Boolean.TRUE); |
| break; |
| } |
| } |
| } catch (FileNotFoundException e) { |
| // ignore this exception as the temp file might have been deleted after timeout |
| } |
| } |
| return raceConditionFound.get(); |
| }; |
| |
| Duration notificationRunDuration = Duration.ofSeconds(3); |
| Duration scannerRunDuration = Duration.ofSeconds(4); |
| Duration timeout = Duration.ofSeconds(10); |
| |
| concurrencyRule.setTimeout(timeout); |
| concurrencyRule.add(cacheNotifications).repeatForDuration(notificationRunDuration); |
| concurrencyRule.add(diskNotifications).repeatForDuration(notificationRunDuration); |
| concurrencyRule.add(scanLogs).repeatForDuration(scannerRunDuration).expectValue(Boolean.FALSE); |
| concurrencyRule.executeInParallel(); |
| } |
| } |