| /* |
| * 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.gossip.event.data; |
| |
| import com.codahale.metrics.MetricRegistry; |
| import org.junit.Assert; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| import org.junit.platform.runner.JUnitPlatform; |
| import org.junit.runner.RunWith; |
| |
| import java.util.concurrent.Semaphore; |
| import java.util.concurrent.TimeUnit; |
| |
| @RunWith(JUnitPlatform.class) |
| public class DataEventManagerTest { |
| |
| private static Semaphore semaphore; |
| private String receivedNodeId; |
| private String receivedKey; |
| private Object receivedNewValue; |
| private Object receivedOldValue; |
| |
| @BeforeClass |
| public static void setup() { |
| semaphore = new Semaphore(0); |
| } |
| |
| @Test |
| public void perNodeDataEventHandlerAddRemoveTest() { |
| DataEventManager eventManager = new DataEventManager(new MetricRegistry()); |
| |
| UpdateNodeDataEventHandler nodeDataEventHandler = (nodeId, key, oldValue, newValue) -> { |
| }; |
| |
| eventManager.registerPerNodeDataSubscriber(nodeDataEventHandler); |
| Assert.assertEquals(1, eventManager.getPerNodeSubscribersSize()); |
| eventManager.unregisterPerNodeDataSubscriber(nodeDataEventHandler); |
| Assert.assertEquals(0, eventManager.getPerNodeSubscribersSize()); |
| } |
| |
| // Test whether the per node data events are fired for matching key |
| @Test |
| public void perNodeDataEventHandlerTest() throws InterruptedException { |
| DataEventManager eventManager = new DataEventManager(new MetricRegistry()); |
| resetData(); |
| |
| // A new subscriber "Juliet" is like to notified when per node data change for the key "Romeo" |
| UpdateNodeDataEventHandler juliet = (nodeId, key, oldValue, newValue) -> { |
| if(!key.equals("Romeo")) return; |
| receivedNodeId = nodeId; |
| receivedKey = key; |
| receivedNewValue = newValue; |
| receivedOldValue = oldValue; |
| semaphore.release(); |
| }; |
| // Juliet register with eventManager |
| eventManager.registerPerNodeDataSubscriber(juliet); |
| // Romeo is going to sleep after having dinner |
| eventManager.notifyPerNodeData("Montague", "Romeo", "sleeping", "eating"); |
| |
| // Juliet should notified |
| semaphore.tryAcquire(2, TimeUnit.SECONDS); |
| Assert.assertEquals("Montague", receivedNodeId); |
| Assert.assertEquals("Romeo", receivedKey); |
| Assert.assertEquals("sleeping", receivedNewValue); |
| Assert.assertEquals("eating", receivedOldValue); |
| |
| eventManager.unregisterPerNodeDataSubscriber(juliet); |
| } |
| |
| @Test |
| public void sharedDataEventHandlerAddRemoveTest() { |
| DataEventManager eventManager = new DataEventManager(new MetricRegistry()); |
| |
| UpdateSharedDataEventHandler sharedDataEventHandler = (key, oldValue, newValue) -> { |
| |
| }; |
| eventManager.registerSharedDataSubscriber(sharedDataEventHandler); |
| Assert.assertEquals(1, eventManager.getSharedDataSubscribersSize()); |
| eventManager.unregisterSharedDataSubscriber(sharedDataEventHandler); |
| Assert.assertEquals(0, eventManager.getSharedDataSubscribersSize()); |
| |
| } |
| |
| // Test whether the shared data events are fired |
| @Test |
| public void sharedDataEventHandlerTest() throws InterruptedException { |
| DataEventManager eventManager = new DataEventManager(new MetricRegistry()); |
| resetData(); |
| |
| // A new subscriber "Alice" is like to notified when shared data change for the key "technology" |
| UpdateSharedDataEventHandler alice = (key, oldValue, newValue) -> { |
| if(!key.equals("technology")) return; |
| receivedKey = key; |
| receivedNewValue = newValue; |
| receivedOldValue = oldValue; |
| semaphore.release(); |
| }; |
| // Alice register with eventManager |
| eventManager.registerSharedDataSubscriber(alice); |
| |
| // technology key get changed |
| eventManager.notifySharedData("technology", "Java has lambda", "Java is fast"); |
| |
| // Alice should notified |
| semaphore.tryAcquire(2, TimeUnit.SECONDS); |
| Assert.assertEquals("technology", receivedKey); |
| Assert.assertEquals("Java has lambda", receivedNewValue); |
| Assert.assertEquals("Java is fast", receivedOldValue); |
| |
| eventManager.unregisterSharedDataSubscriber(alice); |
| } |
| |
| // Test the MetricRegistry |
| @Test |
| public void metricRegistryTest() { |
| MetricRegistry registry = new MetricRegistry(); |
| |
| DataEventManager eventManager = new DataEventManager(registry); |
| |
| UpdateNodeDataEventHandler nodeDataEventHandler = (nodeId, key, oldValue, newValue) -> { |
| }; |
| |
| UpdateSharedDataEventHandler sharedDataEventHandler = (key, oldValue, newValue) -> { |
| }; |
| |
| eventManager.registerPerNodeDataSubscriber(nodeDataEventHandler); |
| eventManager.registerSharedDataSubscriber(sharedDataEventHandler); |
| |
| Assert.assertEquals(1, |
| registry.getGauges().get(DataEventConstants.PER_NODE_DATA_SUBSCRIBERS_SIZE).getValue()); |
| Assert.assertEquals(0, |
| registry.getGauges().get(DataEventConstants.PER_NODE_DATA_SUBSCRIBERS_QUEUE_SIZE) |
| .getValue()); |
| Assert.assertEquals(1, |
| registry.getGauges().get(DataEventConstants.SHARED_DATA_SUBSCRIBERS_SIZE).getValue()); |
| Assert.assertEquals(0, |
| registry.getGauges().get(DataEventConstants.SHARED_DATA_SUBSCRIBERS_QUEUE_SIZE) |
| .getValue()); |
| |
| } |
| |
| private void resetData() { |
| receivedNodeId = null; |
| receivedKey = null; |
| receivedNewValue = null; |
| receivedOldValue = null; |
| } |
| |
| } |