| /** |
| * 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.tajo.rpc; |
| |
| import com.google.common.util.concurrent.ThreadFactoryBuilder; |
| import io.netty.bootstrap.ServerBootstrap; |
| import io.netty.buffer.ByteBufAllocator; |
| import io.netty.buffer.PooledByteBufAllocator; |
| import io.netty.buffer.UnpooledByteBufAllocator; |
| import io.netty.channel.EventLoopGroup; |
| import io.netty.channel.nio.NioEventLoopGroup; |
| import io.netty.util.ResourceLeakDetector; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| public final class NettyUtils { |
| private static final Log LOG = LogFactory.getLog(NettyUtils.class); |
| |
| private static final int DEFAULT_THREAD_NUM = Runtime.getRuntime().availableProcessors() * 2; |
| private static final Object lockObjectForLoopGroup = new Object(); |
| private static final AtomicInteger serverCount = new AtomicInteger(0); |
| |
| public static final ByteBufAllocator ALLOCATOR; |
| |
| public enum GROUP { |
| DEFAULT, |
| FETCHER |
| } |
| |
| private static final Map<GROUP, EventLoopGroup> eventLoopGroupMap = |
| new ConcurrentHashMap<GROUP, EventLoopGroup>(); |
| |
| static { |
| if (RpcConstants.IS_TEST_MODE) { |
| /* Disable pooling buffers for memory usage */ |
| ALLOCATOR = UnpooledByteBufAllocator.DEFAULT; |
| |
| /* if you are finding memory leak, please enable this line */ |
| ResourceLeakDetector.setLevel(ResourceLeakDetector.Level.ADVANCED); |
| } else { |
| ALLOCATOR = PooledByteBufAllocator.DEFAULT; |
| } |
| } |
| |
| private NettyUtils(){ |
| } |
| |
| /** |
| * Get default EventLoopGroup of netty’s. servers and clients can shared it. |
| */ |
| public static EventLoopGroup getDefaultEventLoopGroup() { |
| return getSharedEventLoopGroup(GROUP.DEFAULT, DEFAULT_THREAD_NUM); |
| } |
| |
| /** |
| * Get EventLoopGroup of netty’s. |
| * |
| * @param clientId |
| * @param threads |
| * @return A EventLoopGroup by key |
| */ |
| public static EventLoopGroup getSharedEventLoopGroup(GROUP clientId, int threads) { |
| EventLoopGroup returnEventLoopGroup; |
| |
| synchronized (lockObjectForLoopGroup) { |
| if (!eventLoopGroupMap.containsKey(clientId)) { |
| eventLoopGroupMap.put(clientId, createEventLoopGroup(clientId.name(), threads)); |
| } |
| |
| returnEventLoopGroup = eventLoopGroupMap.get(clientId); |
| if (isEventLoopGroupShuttingDown(returnEventLoopGroup)) { |
| returnEventLoopGroup = createEventLoopGroup(clientId.name(), threads); |
| eventLoopGroupMap.put(clientId, returnEventLoopGroup); |
| } |
| } |
| |
| return returnEventLoopGroup; |
| } |
| |
| public static EventLoopGroup createEventLoopGroup(String name, int threads) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Create " + name + " EventLoopGroup. threads:" + threads); |
| } |
| |
| ThreadFactoryBuilder builder = new ThreadFactoryBuilder(); |
| ThreadFactory clientFactory = builder.setNameFormat(name + " #%d").build(); |
| |
| return createEventLoopGroup(threads, clientFactory); |
| } |
| |
| protected static boolean isEventLoopGroupShuttingDown(EventLoopGroup eventLoopGroup) { |
| return ((eventLoopGroup == null) || eventLoopGroup.isShuttingDown()); |
| } |
| |
| private static EventLoopGroup createEventLoopGroup(int threads, ThreadFactory factory) { |
| return new NioEventLoopGroup(threads, factory); |
| } |
| |
| /** |
| * Server must release the external resources |
| */ |
| public static ServerBootstrap createServerBootstrap(String name, int threads) { |
| name = name + "-" + serverCount.incrementAndGet(); |
| |
| EventLoopGroup eventLoopGroup = createEventLoopGroup(name, threads); |
| return new ServerBootstrap().group(eventLoopGroup, eventLoopGroup); |
| } |
| |
| public static void shutdownGracefully() { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Shutdown Shared RPC Pool"); |
| } |
| synchronized (lockObjectForLoopGroup) { |
| for (EventLoopGroup eventLoopGroup : eventLoopGroupMap.values()) { |
| try { |
| shutdown(eventLoopGroup).sync(); |
| } catch (InterruptedException e) { |
| //ignore |
| } |
| } |
| eventLoopGroupMap.clear(); |
| } |
| } |
| |
| public static io.netty.util.concurrent.Future shutdown(EventLoopGroup eventLoopGroup) { |
| if (eventLoopGroup != null) { |
| if (LOG.isDebugEnabled()) { |
| LOG.debug("Shutdown EventLoopGroup :" + eventLoopGroup.toString()); |
| } |
| |
| return eventLoopGroup.shutdownGracefully(); |
| } |
| return null; |
| } |
| } |