SammyVimes commented on a change in pull request #102: URL: https://github.com/apache/ignite-3/pull/102#discussion_r619075440
########## File path: modules/network/src/main/java/org/apache/ignite/network/internal/netty/ConnectionManager.java ########## @@ -0,0 +1,167 @@ +/* + * 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.ignite.network.internal.netty; + +import io.netty.channel.socket.SocketChannel; +import java.net.InetSocketAddress; +import java.util.ArrayList; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.ConcurrentHashMap; +import java.util.concurrent.ExecutionException; +import java.util.function.BiConsumer; +import org.apache.ignite.lang.IgniteInternalException; +import org.apache.ignite.network.message.MessageSerializationRegistry; +import org.apache.ignite.network.message.NetworkMessage; + +/** + * Class that manages connections both incoming and outgoing. + */ +public class ConnectionManager { + /** Server. */ + private NettyServer server; + + /** Senders that wrap channels both incoming and outgoing. */ + private Map<InetSocketAddress, NettySender> channels = new ConcurrentHashMap<>(); + + /** Clients. */ + private Map<InetSocketAddress, NettyClient> clients = new ConcurrentHashMap<>(); + + /** Serialization registry. */ + private final MessageSerializationRegistry serializationRegistry; + + /** Message listeners. */ + private List<BiConsumer<InetSocketAddress, NetworkMessage>> listeners = Collections.synchronizedList(new ArrayList<>()); + + public ConnectionManager(int port, MessageSerializationRegistry provider) { + this.serializationRegistry = provider; + this.server = new NettyServer(port, this::onNewIncomingChannel, this::onMessage, serializationRegistry); + } + + /** + * Start server. + * + * @throws IgniteInternalException If failed to start. + */ + public void start() throws IgniteInternalException { + try { + server.start().get(); + } + catch (ExecutionException e) { + Throwable cause = e.getCause(); + throw new IgniteInternalException("Failed to start server: " + cause.getMessage(), cause); + } + catch (InterruptedException e) { + throw new IgniteInternalException( + "Got interrupted while waiting for server to start: " + e.getMessage(), + e + ); + } + } + + /** + * @return Server local address. + */ + public InetSocketAddress getLocalAddress() { + return server.address(); + } + + /** + * Get a {@link NettySender}, that sends data from this node to another node with the specified address. + * @param address Another node's address. + * @return Sender. + */ + public CompletableFuture<NettySender> channel(InetSocketAddress address) { + NettySender channel = channels.get(address); + + if (channel == null) { + NettyClient client = clients.computeIfAbsent(address, this::connect); + return client.sender(); + } + + return CompletableFuture.completedFuture(channel); + } + + /** + * Callback that is called upon receiving of a new message. + * + * @param from Source of the message. + * @param message New message. + */ + private void onMessage(InetSocketAddress from, NetworkMessage message) { + listeners.forEach(consumer -> { + consumer.accept(from, message); + }); + } + + /** + * Callback that is called upon new client connected to the server. + * + * @param channel Channel from client to this {@link #server}. + */ + private void onNewIncomingChannel(SocketChannel channel) { + InetSocketAddress remoteAddress = channel.remoteAddress(); + // TODO: there might be outgoing connection already + channels.put(remoteAddress, new NettySender(channel, serializationRegistry)); + } + + /** + * Create new client from this node to specified address. + * + * @param address Target address. + * @return New netty client. + */ + private NettyClient connect(InetSocketAddress address) { + NettyClient client = new NettyClient(address.getHostName(), address.getPort(), serializationRegistry, (src, message) -> { + this.onMessage(src, message); + }); + + client.start().whenComplete((sender, throwable) -> { + if (throwable != null) + clients.remove(address); Review comment: There is no associated channel for this client, it only gets put in a map if there were no errors -- This is an automated message from the Apache Git Service. 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