| /* |
| * 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.internal.cache.tier.sockets; |
| |
| import static org.assertj.core.api.Assertions.assertThat; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataInputStream; |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| |
| import com.google.common.collect.MapDifference; |
| import com.google.common.collect.Maps; |
| import org.junit.Test; |
| |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.internal.InternalDataSerializer; |
| |
| public class CqNameToOpHashMapIntegrationTest { |
| /** |
| * This test ensures that we can safely mutate the CqNameToOpHashMap while it is being |
| * serialized in another thread. The use case for this is that we repopulate this map |
| * during client registration, which can happen concurrently with a GII which causes |
| * serialization to occur if this map is referenced by any of the client subscription |
| * queues. This integration test does not exercise this full system level interaction, |
| * but rather does the minimum necessary to prove that map mutation and serialization |
| * can occur concurrently without any issues such as size mismatches or |
| * ConcurrentModificationExceptions. |
| */ |
| @Test |
| public void testSendToWhileConcurrentlyModifyingMapContentsAndVerifyProperSerialization() |
| throws IOException, ClassNotFoundException, InterruptedException, ExecutionException, |
| TimeoutException { |
| final int numEntries = 1000000; |
| |
| ClientUpdateMessageImpl.CqNameToOpHashMap originalCqNameToOpHashMap = |
| new ClientUpdateMessageImpl.CqNameToOpHashMap(numEntries); |
| ClientUpdateMessageImpl.CqNameToOpHashMap modifiedCqNameToOpHashMap = |
| new ClientUpdateMessageImpl.CqNameToOpHashMap(numEntries); |
| |
| for (int i = 0; i < numEntries; ++i) { |
| originalCqNameToOpHashMap.add(String.valueOf(i), i); |
| modifiedCqNameToOpHashMap.add(String.valueOf(i), i); |
| } |
| |
| CompletableFuture<Void> removeFromHashMapTask = CompletableFuture.runAsync(() -> { |
| for (int i = 0; i < numEntries; ++i) { |
| modifiedCqNameToOpHashMap.remove(String.valueOf(i), i); |
| } |
| }); |
| |
| CompletableFuture<Void> serializeReconstructHashMapTask = CompletableFuture.runAsync(() -> { |
| try { |
| ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream(); |
| DataOutputStream outputStream = new DataOutputStream(byteArrayOutputStream); |
| |
| modifiedCqNameToOpHashMap.sendTo(outputStream); |
| |
| ByteArrayInputStream byteArrayInputStream = |
| new ByteArrayInputStream(byteArrayOutputStream.toByteArray()); |
| |
| DataInputStream inputStream = new DataInputStream(byteArrayInputStream); |
| |
| byte typeByte = inputStream.readByte(); |
| int cqNamesSize = InternalDataSerializer.readArrayLength(inputStream); |
| |
| ClientUpdateMessageImpl.CqNameToOpHashMap reconstructedCqNameToOpHashMap = |
| new ClientUpdateMessageImpl.CqNameToOpHashMap(cqNamesSize); |
| |
| for (int j = 0; j < cqNamesSize; j++) { |
| String cqNamesKey = DataSerializer.<String>readObject(inputStream); |
| Integer cqNamesValue = DataSerializer.<Integer>readObject(inputStream); |
| reconstructedCqNameToOpHashMap.add(cqNamesKey, cqNamesValue); |
| } |
| |
| // The reconstructed map should have some subset of the entries in the cqNameToOpHashMap, |
| // but the specific contents will depend on timing with the removeFromHashMap task. |
| MapDifference<String, Integer> reconstructedVersusOriginalHashMapDifference = |
| Maps.difference(reconstructedCqNameToOpHashMap, originalCqNameToOpHashMap); |
| assertThat(reconstructedVersusOriginalHashMapDifference.entriesInCommon().size() >= 0) |
| .isTrue(); |
| assertThat(reconstructedVersusOriginalHashMapDifference.entriesDiffering().size() == 0) |
| .isTrue(); |
| } catch (Exception ex) { |
| throw new RuntimeException("Failed to serialize/deserialize the CqNameToOpHashMap", ex); |
| } |
| }); |
| |
| CompletableFuture.allOf(removeFromHashMapTask, serializeReconstructHashMapTask).get(1, |
| TimeUnit.MINUTES); |
| } |
| } |