| /* |
| * 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.streaming.async; |
| |
| import java.io.IOException; |
| import java.net.InetSocketAddress; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| |
| import io.netty.channel.Channel; |
| import io.netty.channel.ChannelPipeline; |
| import io.netty.channel.EventLoop; |
| import io.netty.util.concurrent.Future; // checkstyle: permit this import |
| import org.apache.cassandra.net.ConnectionCategory; |
| import org.apache.cassandra.net.MessagingService; |
| import org.apache.cassandra.net.OutboundConnectionInitiator.Result; |
| import org.apache.cassandra.net.OutboundConnectionInitiator.Result.StreamingSuccess; |
| import org.apache.cassandra.net.OutboundConnectionSettings; |
| import org.apache.cassandra.streaming.StreamingChannel; |
| |
| import static org.apache.cassandra.locator.InetAddressAndPort.getByAddress; |
| import static org.apache.cassandra.net.InternodeConnectionUtils.isSSLError; |
| import static org.apache.cassandra.net.OutboundConnectionInitiator.initiateStreaming; |
| import static org.apache.cassandra.net.OutboundConnectionInitiator.SslFallbackConnectionType; |
| import static org.apache.cassandra.net.OutboundConnectionInitiator.SslFallbackConnectionType.SERVER_CONFIG; |
| |
| public class NettyStreamingConnectionFactory implements StreamingChannel.Factory |
| { |
| @VisibleForTesting |
| public static int MAX_CONNECT_ATTEMPTS = 3; |
| |
| public static NettyStreamingChannel connect(OutboundConnectionSettings template, int messagingVersion, StreamingChannel.Kind kind) throws IOException |
| { |
| EventLoop eventLoop = MessagingService.instance().socketFactory.outboundStreamingGroup().next(); |
| OutboundConnectionSettings settings = template.withDefaults(ConnectionCategory.STREAMING); |
| List<SslFallbackConnectionType> sslFallbacks = settings.withEncryption() && settings.encryption.getOptional() |
| ? Arrays.asList(SslFallbackConnectionType.values()) |
| : Collections.singletonList(SERVER_CONFIG); |
| |
| Throwable cause = null; |
| for (final SslFallbackConnectionType sslFallbackConnectionType : sslFallbacks) |
| { |
| for (int i = 0; i < MAX_CONNECT_ATTEMPTS; i++) |
| { |
| Future<Result<StreamingSuccess>> result = initiateStreaming(eventLoop, settings, sslFallbackConnectionType, messagingVersion); |
| result.awaitUninterruptibly(); // initiate has its own timeout, so this is "guaranteed" to return relatively promptly |
| if (result.isSuccess()) |
| { |
| Channel channel = result.getNow().success().channel; |
| NettyStreamingChannel streamingChannel = new NettyStreamingChannel(messagingVersion, channel, kind); |
| if (kind == StreamingChannel.Kind.CONTROL) |
| { |
| ChannelPipeline pipeline = channel.pipeline(); |
| pipeline.addLast("stream", streamingChannel); |
| } |
| return streamingChannel; |
| } |
| cause = result.cause(); |
| } |
| if (!isSSLError(cause)) |
| { |
| // Fallback only when the error is SSL related, otherwise retries are exhausted, so fail |
| break; |
| } |
| } |
| throw new IOException("failed to connect to " + template.to + " for streaming data", cause); |
| } |
| |
| @Override |
| public StreamingChannel create(InetSocketAddress to, int messagingVersion, StreamingChannel.Kind kind) throws IOException |
| { |
| return connect(new OutboundConnectionSettings(getByAddress(to)), messagingVersion, kind); |
| } |
| |
| @Override |
| public StreamingChannel create(InetSocketAddress to, |
| InetSocketAddress preferred, |
| int messagingVersion, |
| StreamingChannel.Kind kind) throws IOException |
| { |
| return connect(new OutboundConnectionSettings(getByAddress(to), getByAddress(preferred)), messagingVersion, kind); |
| } |
| } |