| /* |
| * 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.cassandra.diag; |
| |
| import java.io.Serializable; |
| import java.util.HashMap; |
| import java.util.LinkedList; |
| import java.util.List; |
| import java.util.function.Consumer; |
| |
| import com.google.common.collect.ImmutableList; |
| import org.junit.After; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import org.apache.cassandra.OrderedJUnit4ClassRunner; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| @RunWith(OrderedJUnit4ClassRunner.class) |
| public class DiagnosticEventServiceTest |
| { |
| |
| @BeforeClass |
| public static void setup() |
| { |
| DatabaseDescriptor.daemonInitialization(); |
| } |
| |
| @After |
| public void cleanup() |
| { |
| DiagnosticEventService.instance().cleanup(); |
| } |
| |
| @Test |
| public void testSubscribe() |
| { |
| DiagnosticEventService instance = DiagnosticEventService.instance(); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| Consumer<TestEvent1> consumer1 = (event) -> |
| { |
| }; |
| Consumer<TestEvent1> consumer2 = (event) -> |
| { |
| }; |
| Consumer<TestEvent1> consumer3 = (event) -> |
| { |
| }; |
| instance.subscribe(TestEvent1.class, consumer1); |
| instance.subscribe(TestEvent1.class, consumer2); |
| instance.subscribe(TestEvent1.class, consumer3); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| instance.unsubscribe(consumer1); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| instance.unsubscribe(consumer2); |
| instance.unsubscribe(consumer3); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| } |
| |
| @Test |
| public void testSubscribeByType() |
| { |
| DiagnosticEventService instance = DiagnosticEventService.instance(); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| Consumer<TestEvent1> consumer1 = (event) -> |
| { |
| }; |
| Consumer<TestEvent1> consumer2 = (event) -> |
| { |
| }; |
| Consumer<TestEvent1> consumer3 = (event) -> |
| { |
| }; |
| |
| assertFalse(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST1)); |
| instance.subscribe(TestEvent1.class, TestEventType.TEST1, consumer1); |
| assertTrue(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST1)); |
| assertFalse(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST2)); |
| |
| instance.subscribe(TestEvent1.class, TestEventType.TEST2, consumer2); |
| instance.subscribe(TestEvent1.class, TestEventType.TEST2, consumer2); |
| instance.subscribe(TestEvent1.class, TestEventType.TEST2, consumer2); |
| assertTrue(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST2)); |
| |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| |
| instance.subscribe(TestEvent1.class, consumer3); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertTrue(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST1)); |
| assertTrue(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST2)); |
| assertTrue(instance.hasSubscribers(TestEvent1.class, TestEventType.TEST3)); |
| |
| instance.unsubscribe(consumer1); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| instance.unsubscribe(consumer2); |
| instance.unsubscribe(consumer3); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| } |
| |
| @Test |
| public void testSubscribeAll() |
| { |
| DiagnosticEventService instance = DiagnosticEventService.instance(); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| Consumer<DiagnosticEvent> consumerAll1 = (event) -> |
| { |
| }; |
| Consumer<DiagnosticEvent> consumerAll2 = (event) -> |
| { |
| }; |
| Consumer<DiagnosticEvent> consumerAll3 = (event) -> |
| { |
| }; |
| instance.subscribeAll(consumerAll1); |
| instance.subscribeAll(consumerAll2); |
| instance.subscribeAll(consumerAll3); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertTrue(instance.hasSubscribers(TestEvent2.class)); |
| instance.unsubscribe(consumerAll1); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertTrue(instance.hasSubscribers(TestEvent2.class)); |
| instance.unsubscribe(consumerAll2); |
| instance.unsubscribe(consumerAll3); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| } |
| |
| @Test |
| public void testCleanup() |
| { |
| DiagnosticEventService instance = DiagnosticEventService.instance(); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| Consumer<TestEvent1> consumer = (event) -> |
| { |
| }; |
| instance.subscribe(TestEvent1.class, consumer); |
| Consumer<DiagnosticEvent> consumerAll = (event) -> |
| { |
| }; |
| instance.subscribeAll(consumerAll); |
| assertTrue(instance.hasSubscribers(TestEvent1.class)); |
| assertTrue(instance.hasSubscribers(TestEvent2.class)); |
| instance.cleanup(); |
| assertFalse(instance.hasSubscribers(TestEvent1.class)); |
| assertFalse(instance.hasSubscribers(TestEvent2.class)); |
| } |
| |
| @Test |
| public void testPublish() |
| { |
| DiagnosticEventService instance = DiagnosticEventService.instance(); |
| TestEvent1 a = new TestEvent1(); |
| TestEvent1 b = new TestEvent1(); |
| TestEvent1 c = new TestEvent1(); |
| List<TestEvent1> events = ImmutableList.of(a, b, c, c, c); |
| |
| List<DiagnosticEvent> consumed = new LinkedList<>(); |
| Consumer<TestEvent1> consumer = consumed::add; |
| Consumer<DiagnosticEvent> consumerAll = consumed::add; |
| |
| DatabaseDescriptor.setDiagnosticEventsEnabled(true); |
| instance.publish(c); |
| instance.subscribe(TestEvent1.class, consumer); |
| instance.publish(a); |
| instance.unsubscribe(consumer); |
| instance.publish(c); |
| instance.subscribeAll(consumerAll); |
| instance.publish(b); |
| instance.subscribe(TestEvent1.class, TestEventType.TEST3, consumer); |
| instance.publish(c); |
| instance.subscribe(TestEvent1.class, TestEventType.TEST1, consumer); |
| instance.publish(c); |
| |
| assertEquals(events, consumed); |
| } |
| |
| @Test |
| public void testEnabled() |
| { |
| DatabaseDescriptor.setDiagnosticEventsEnabled(false); |
| DiagnosticEventService.instance().subscribe(TestEvent1.class, (event) -> fail()); |
| DiagnosticEventService.instance().publish(new TestEvent1()); |
| DatabaseDescriptor.setDiagnosticEventsEnabled(true); |
| } |
| |
| public static class TestEvent1 extends DiagnosticEvent |
| { |
| public TestEventType getType() |
| { |
| return TestEventType.TEST1; |
| } |
| |
| public HashMap<String, Serializable> toMap() |
| { |
| return null; |
| } |
| } |
| |
| public static class TestEvent2 extends DiagnosticEvent |
| { |
| public TestEventType getType() |
| { |
| return TestEventType.TEST2; |
| } |
| |
| public HashMap<String, Serializable> toMap() |
| { |
| return null; |
| } |
| } |
| |
| public enum TestEventType { TEST1, TEST2, TEST3 }; |
| } |