| /* |
| * 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.service; |
| |
| import java.net.InetAddress; |
| import java.util.Arrays; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.concurrent.TimeUnit; |
| |
| import com.google.common.annotations.VisibleForTesting; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import io.netty.channel.EventLoopGroup; |
| import io.netty.channel.epoll.Epoll; |
| import io.netty.channel.epoll.EpollEventLoopGroup; |
| import io.netty.channel.nio.NioEventLoopGroup; |
| import io.netty.util.concurrent.EventExecutor; |
| import org.apache.cassandra.config.DatabaseDescriptor; |
| import org.apache.cassandra.metrics.AuthMetrics; |
| import org.apache.cassandra.metrics.ClientMetrics; |
| import org.apache.cassandra.transport.RequestThreadPoolExecutor; |
| import org.apache.cassandra.transport.Server; |
| |
| /** |
| * Handles native transport server lifecycle and associated resources. Lazily initialized. |
| */ |
| public class NativeTransportService |
| { |
| |
| private static final Logger logger = LoggerFactory.getLogger(NativeTransportService.class); |
| |
| private Collection<Server> servers = Collections.emptyList(); |
| |
| private boolean initialized = false; |
| private EventLoopGroup workerGroup; |
| private EventExecutor eventExecutorGroup; |
| |
| /** |
| * Creates netty thread pools and event loops. |
| */ |
| @VisibleForTesting |
| synchronized void initialize() |
| { |
| if (initialized) |
| return; |
| |
| // prepare netty resources |
| eventExecutorGroup = new RequestThreadPoolExecutor(); |
| |
| if (useEpoll()) |
| { |
| workerGroup = new EpollEventLoopGroup(); |
| logger.info("Netty using native Epoll event loop"); |
| } |
| else |
| { |
| workerGroup = new NioEventLoopGroup(); |
| logger.info("Netty using Java NIO event loop"); |
| } |
| |
| int nativePort = DatabaseDescriptor.getNativeTransportPort(); |
| int nativePortSSL = DatabaseDescriptor.getNativeTransportPortSSL(); |
| InetAddress nativeAddr = DatabaseDescriptor.getRpcAddress(); |
| |
| org.apache.cassandra.transport.Server.Builder builder = new org.apache.cassandra.transport.Server.Builder() |
| .withEventExecutor(eventExecutorGroup) |
| .withEventLoopGroup(workerGroup) |
| .withHost(nativeAddr); |
| |
| if (!DatabaseDescriptor.getClientEncryptionOptions().enabled) |
| { |
| servers = Collections.singleton(builder.withSSL(false).withPort(nativePort).build()); |
| } |
| else |
| { |
| if (nativePort != nativePortSSL) |
| { |
| // user asked for dedicated ssl port for supporting both non-ssl and ssl connections |
| servers = Collections.unmodifiableList( |
| Arrays.asList( |
| builder.withSSL(false).withPort(nativePort).build(), |
| builder.withSSL(true).withPort(nativePortSSL).build() |
| ) |
| ); |
| } |
| else |
| { |
| // ssl only mode using configured native port |
| servers = Collections.singleton(builder.withSSL(true).withPort(nativePort).build()); |
| } |
| } |
| |
| // register metrics |
| ClientMetrics.instance.addCounter("connectedNativeClients", () -> |
| { |
| int ret = 0; |
| for (Server server : servers) |
| ret += server.getConnectedClients(); |
| return ret; |
| }); |
| |
| AuthMetrics.init(); |
| |
| initialized = true; |
| } |
| |
| /** |
| * Starts native transport servers. |
| */ |
| public void start() |
| { |
| initialize(); |
| servers.forEach(Server::start); |
| } |
| |
| /** |
| * Stops currently running native transport servers. |
| */ |
| public void stop() |
| { |
| servers.forEach(Server::stop); |
| } |
| |
| /** |
| * Ultimately stops servers and closes all resources. |
| */ |
| public void destroy() |
| { |
| stop(); |
| servers = Collections.emptyList(); |
| |
| // shutdown executors used by netty for native transport server |
| workerGroup.shutdownGracefully(3, 5, TimeUnit.SECONDS).awaitUninterruptibly(); |
| |
| // shutdownGracefully not implemented yet in RequestThreadPoolExecutor |
| eventExecutorGroup.shutdown(); |
| } |
| |
| /** |
| * @return intend to use epoll bassed event looping |
| */ |
| public static boolean useEpoll() |
| { |
| final boolean enableEpoll = Boolean.parseBoolean(System.getProperty("cassandra.native.epoll.enabled", "true")); |
| return enableEpoll && Epoll.isAvailable(); |
| } |
| |
| /** |
| * @return true in case native transport server is running |
| */ |
| public boolean isRunning() |
| { |
| for (Server server : servers) |
| if (server.isRunning()) return true; |
| return false; |
| } |
| |
| @VisibleForTesting |
| EventLoopGroup getWorkerGroup() |
| { |
| return workerGroup; |
| } |
| |
| @VisibleForTesting |
| EventExecutor getEventExecutor() |
| { |
| return eventExecutorGroup; |
| } |
| |
| @VisibleForTesting |
| Collection<Server> getServers() |
| { |
| return servers; |
| } |
| } |