| /* |
| * 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.gms; |
| |
| import java.util.Collections; |
| import java.util.EnumMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.UUID; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.junit.Test; |
| |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.dht.Token; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| public class EndpointStateTest |
| { |
| public volatile VersionedValue.VersionedValueFactory valueFactory = |
| new VersionedValue.VersionedValueFactory(DatabaseDescriptor.getPartitioner()); |
| |
| @Test |
| public void testMultiThreadedReadConsistency() throws InterruptedException |
| { |
| for (int i = 0; i < 500; i++) |
| innerTestMultiThreadedReadConsistency(); |
| } |
| |
| /** |
| * Test that a thread reading values whilst they are updated by another thread will |
| * not see an entry unless it sees the entry previously added as well, even though |
| * we are accessing the map via an iterator backed by the underlying map. This |
| * works because EndpointState copies the map each time values are added. |
| */ |
| private void innerTestMultiThreadedReadConsistency() throws InterruptedException |
| { |
| final Token token = DatabaseDescriptor.getPartitioner().getRandomToken(); |
| final List<Token> tokens = Collections.singletonList(token); |
| final HeartBeatState hb = new HeartBeatState(0); |
| final EndpointState state = new EndpointState(hb); |
| final AtomicInteger numFailures = new AtomicInteger(); |
| |
| Thread t1 = new Thread(new Runnable() |
| { |
| public void run() |
| { |
| state.addApplicationState(ApplicationState.TOKENS, valueFactory.tokens(tokens)); |
| state.addApplicationState(ApplicationState.STATUS, valueFactory.normal(tokens)); |
| } |
| }); |
| |
| Thread t2 = new Thread(new Runnable() |
| { |
| public void run() |
| { |
| for (int i = 0; i < 50; i++) |
| { |
| Map<ApplicationState, VersionedValue> values = new EnumMap<>(ApplicationState.class); |
| for (Map.Entry<ApplicationState, VersionedValue> entry : state.states()) |
| values.put(entry.getKey(), entry.getValue()); |
| |
| if (values.containsKey(ApplicationState.STATUS) && !values.containsKey(ApplicationState.TOKENS)) |
| { |
| numFailures.incrementAndGet(); |
| System.out.println(String.format("Failed: %s", values)); |
| } |
| } |
| } |
| }); |
| |
| t1.start(); |
| t2.start(); |
| |
| t1.join(); |
| t2.join(); |
| |
| assertTrue(numFailures.get() == 0); |
| } |
| |
| @Test |
| public void testMultiThreadWriteConsistency() throws InterruptedException |
| { |
| for (int i = 0; i < 500; i++) |
| innerTestMultiThreadWriteConsistency(); |
| } |
| |
| /** |
| * Test that two threads can update the state map concurrently. |
| */ |
| private void innerTestMultiThreadWriteConsistency() throws InterruptedException |
| { |
| final Token token = DatabaseDescriptor.getPartitioner().getRandomToken(); |
| final List<Token> tokens = Collections.singletonList(token); |
| final String ip = "127.0.0.1"; |
| final UUID hostId = UUID.randomUUID(); |
| final HeartBeatState hb = new HeartBeatState(0); |
| final EndpointState state = new EndpointState(hb); |
| |
| Thread t1 = new Thread(new Runnable() |
| { |
| public void run() |
| { |
| Map<ApplicationState, VersionedValue> states = new EnumMap<>(ApplicationState.class); |
| states.put(ApplicationState.TOKENS, valueFactory.tokens(tokens)); |
| states.put(ApplicationState.STATUS, valueFactory.normal(tokens)); |
| state.addApplicationStates(states); |
| } |
| }); |
| |
| Thread t2 = new Thread(new Runnable() |
| { |
| public void run() |
| { |
| Map<ApplicationState, VersionedValue> states = new EnumMap<>(ApplicationState.class); |
| states.put(ApplicationState.INTERNAL_IP, valueFactory.internalIP(ip)); |
| states.put(ApplicationState.HOST_ID, valueFactory.hostId(hostId)); |
| state.addApplicationStates(states); |
| } |
| }); |
| |
| t1.start(); |
| t2.start(); |
| |
| t1.join(); |
| t2.join(); |
| |
| Set<Map.Entry<ApplicationState, VersionedValue>> states = state.states(); |
| assertEquals(4, states.size()); |
| |
| Map<ApplicationState, VersionedValue> values = new EnumMap<>(ApplicationState.class); |
| for (Map.Entry<ApplicationState, VersionedValue> entry : states) |
| values.put(entry.getKey(), entry.getValue()); |
| |
| assertTrue(values.containsKey(ApplicationState.STATUS)); |
| assertTrue(values.containsKey(ApplicationState.TOKENS)); |
| assertTrue(values.containsKey(ApplicationState.INTERNAL_IP)); |
| assertTrue(values.containsKey(ApplicationState.HOST_ID)); |
| } |
| } |