mumrah commented on a change in pull request #10220: URL: https://github.com/apache/kafka/pull/10220#discussion_r597214017
########## File path: core/src/test/java/kafka/testkit/KafkaClusterTestKit.java ########## @@ -0,0 +1,499 @@ +/* + * 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 kafka.testkit; + +import kafka.raft.KafkaRaftManager; +import kafka.server.KafkaConfig; +import kafka.server.KafkaConfig$; +import kafka.server.Server; +import kafka.server.BrokerServer; +import kafka.server.ControllerServer; +import kafka.server.MetaProperties; +import kafka.tools.StorageTool; +import org.apache.kafka.clients.CommonClientConfigs; +import org.apache.kafka.common.Node; +import org.apache.kafka.common.TopicPartition; +import org.apache.kafka.common.metrics.Metrics; +import org.apache.kafka.common.network.ListenerName; +import org.apache.kafka.common.utils.ThreadUtils; +import org.apache.kafka.common.utils.Time; +import org.apache.kafka.common.utils.Utils; +import org.apache.kafka.controller.Controller; +import org.apache.kafka.metadata.ApiMessageAndVersion; +import org.apache.kafka.metalog.MetaLogManager; +import org.apache.kafka.raft.RaftConfig; +import org.apache.kafka.raft.metadata.MetaLogRaftShim; +import org.apache.kafka.raft.metadata.MetadataRecordSerde; +import org.apache.kafka.test.TestUtils; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; +import scala.Option; +import scala.collection.JavaConverters; + +import java.io.ByteArrayOutputStream; +import java.io.File; +import java.io.IOException; +import java.io.PrintStream; +import java.nio.file.Files; +import java.nio.file.Paths; +import java.util.AbstractMap.SimpleImmutableEntry; +import java.util.ArrayList; +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.Map.Entry; +import java.util.Properties; +import java.util.TreeMap; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ExecutionException; +import java.util.concurrent.ExecutorService; +import java.util.concurrent.Executors; +import java.util.concurrent.Future; +import java.util.concurrent.TimeUnit; +import java.util.stream.Collectors; + + +@SuppressWarnings("deprecation") // Needed for Scala 2.12 compatibility +public class KafkaClusterTestKit implements AutoCloseable { + private final static Logger log = LoggerFactory.getLogger(KafkaClusterTestKit.class); + + /** + * This class manages a future which is completed with the proper value for + * controller.quorum.voters once the randomly assigned ports for all the controllers are + * known. + */ + private static class ControllerQuorumVotersFutureManager implements AutoCloseable { + private final int expectedControllers; + private final CompletableFuture<List<String>> future = new CompletableFuture<>(); + private final Map<Integer, Integer> controllerPorts = new TreeMap<>(); + + ControllerQuorumVotersFutureManager(int expectedControllers) { + this.expectedControllers = expectedControllers; + } + + synchronized void registerPort(int nodeId, int port) { + controllerPorts.put(nodeId, port); + if (controllerPorts.size() >= expectedControllers) { + future.complete(controllerPorts.entrySet().stream(). + map(e -> String.format("%d@localhost:%d", e.getKey(), e.getValue())). + collect(Collectors.toList())); + } + } + + void fail(Throwable e) { + future.completeExceptionally(e); + } + + @Override + public void close() { + future.cancel(true); + } + } + + public static class Builder { + private TestKitNodes nodes; + private Map<String, String> configProps = new HashMap<>(); + + public Builder(TestKitNodes nodes) { + this.nodes = nodes; + } + + public Builder setConfigProp(String key, String value) { + this.configProps.put(key, value); + return this; + } + + public KafkaClusterTestKit build() throws Exception { + Map<Integer, ControllerServer> controllers = new HashMap<>(); + Map<Integer, BrokerServer> kip500Brokers = new HashMap<>(); + Map<Integer, KafkaRaftManager> raftManagers = new HashMap<>(); + String dummyQuorumVotersString = nodes.controllerNodes().keySet().stream(). + map(controllerNode -> String.format("%d@0.0.0.0:0", controllerNode)). + collect(Collectors.joining(",")); + /* + Number of threads = Total number of brokers + Total number of controllers + Total number of Raft Managers + = Total number of brokers + Total number of controllers * 2 + (Raft Manager per broker/controller) + */ + int numOfExecutorThreads = (nodes.brokerNodes().size() + nodes.controllerNodes().size()) * 2; + ExecutorService executorService = null; + ControllerQuorumVotersFutureManager connectFutureManager = + new ControllerQuorumVotersFutureManager(nodes.controllerNodes().size()); + File baseDirectory = null; + + try { + baseDirectory = TestUtils.tempDirectory(); + nodes = nodes.copyWithAbsolutePaths(baseDirectory.getAbsolutePath()); + executorService = Executors.newFixedThreadPool(numOfExecutorThreads, + ThreadUtils.createThreadFactory("KafkaClusterTestKit%d", false)); + Time time = Time.SYSTEM; + for (ControllerNode node : nodes.controllerNodes().values()) { Review comment: I took a stab at this and it didn't really end up much cleaner -- This is an automated message from the Apache Git Service. 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