cmccabe commented on code in PR #16991: URL: https://github.com/apache/kafka/pull/16991#discussion_r1742405774
########## core/src/test/java/kafka/testkit/PreboundSocketFactoryManager.java: ########## @@ -0,0 +1,177 @@ +/* + * 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.server.ServerSocketFactory; + +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +import java.io.IOException; +import java.net.InetSocketAddress; +import java.nio.channels.ServerSocketChannel; +import java.util.Collections; +import java.util.HashMap; +import java.util.HashSet; +import java.util.Map; +import java.util.Map.Entry; +import java.util.Set; + +public class PreboundSocketFactoryManager implements AutoCloseable { + private static final Logger LOG = LoggerFactory.getLogger(PreboundSocketFactoryManager.class); + + private class PreboundSocketFactory implements ServerSocketFactory { + private final int nodeId; + + private PreboundSocketFactory(int nodeId) { + this.nodeId = nodeId; + } + + @Override + public ServerSocketChannel openServerSocket( + String listenerName, + InetSocketAddress socketAddress, + int listenBacklogSize, + int recvBufferSize + ) throws IOException { + ServerSocketChannel socketChannel = getSocketForListenerAndMarkAsUsed( + nodeId, + listenerName); + if (socketChannel != null) { + return socketChannel; + } + return KafkaServerSocketFactory.INSTANCE.openServerSocket( + listenerName, + socketAddress, + listenBacklogSize, + recvBufferSize); + } + } + + /** + * True if this manager is closed. + */ + private boolean closed = false; + + /** + * Maps node IDs to socket factory objects. + * Protected by the object lock. + */ + private final Map<Integer, PreboundSocketFactory> factories = new HashMap<>(); + + /** + * Maps node IDs to maps of listener names to ports. + * Protected by the object lock. + */ + private final Map<Integer, Map<String, ServerSocketChannel>> sockets = new HashMap<>(); + + /** + * Maps node IDs to set of the listeners that were used. + * Protected by the object lock. + */ + private final Map<Integer, Set<String>> usedSockets = new HashMap<>(); + + /** + * Get a socket from this manager, mark it as used, and return it. + * + * @param nodeId The ID of the node. + * @param listener The listener for the socket. + * + * @return null if the socket was not found; the socket, otherwise. + */ + public synchronized ServerSocketChannel getSocketForListenerAndMarkAsUsed( + int nodeId, + String listener + ) { + Map<String, ServerSocketChannel> socketsForNode = sockets.get(nodeId); + if (socketsForNode == null) { + return null; + } + ServerSocketChannel socket = socketsForNode.get(listener); + if (socket == null) { + return null; + } + usedSockets.computeIfAbsent(nodeId, __ -> new HashSet<>()).add(listener); + return socket; + } + + /** + * Get or create a socket factory object associated with a given node ID. + * + * @param nodeId The ID of the node. + * + * @return The socket factory. + */ + public synchronized PreboundSocketFactory getOrCreateSocketFactory(int nodeId) { + return factories.computeIfAbsent(nodeId, __ -> new PreboundSocketFactory(nodeId)); + } + + /** + * Get a specific port number. The port will be created if it does not already exist. + * + * @param nodeId The ID of the node. + * @param listener The listener for the socket. + * + * @return The port number. + */ + public synchronized int getOrCreatePortForListener( + int nodeId, + String listener + ) throws IOException { + Map<String, ServerSocketChannel> socketsForNode = + sockets.computeIfAbsent(nodeId, __ -> new HashMap<>()); + ServerSocketChannel socketChannel = socketsForNode.get(listener); + if (socketChannel == null) { + if (closed) { + throw new RuntimeException("Cannot open new socket: manager is closed."); + } + socketChannel = ServerSocketFactory.KafkaServerSocketFactory.INSTANCE.openServerSocket( + listener, + new InetSocketAddress(0), + -1, + -1); + socketsForNode.put(listener, socketChannel); + } + InetSocketAddress socketAddress = (InetSocketAddress) socketChannel.getLocalAddress(); + return socketAddress.getPort(); + } + + @Override + public synchronized void close() throws Exception { + if (closed) { + return; + } + closed = true; + // Close all sockets that haven't been used by a SocketServer. (We don't want to close the + // ones that have been used by a SocketServer because that is the responsibility of that + // SocketServer.) + for (Entry<Integer, Map<String, ServerSocketChannel>> socketsEntry : sockets.entrySet()) { + Set<String> usedListeners = usedSockets.getOrDefault( + socketsEntry.getKey(), Collections.emptySet()); + for (Entry<String, ServerSocketChannel> entry : socketsEntry.getValue().entrySet()) { + if (!usedListeners.contains(entry.getKey())) { + try { Review Comment: Sorry, you're right. I misinterpreted a compiler error I got for an unrelated reason. This should be fixed now. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
