| /* |
| * 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.servicecomb.foundation.vertx.tcp; |
| |
| import java.util.Queue; |
| import java.util.concurrent.ConcurrentLinkedQueue; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| import io.netty.buffer.ByteBuf; |
| import io.netty.buffer.ByteBufAllocator; |
| import io.netty.buffer.CompositeByteBuf; |
| import io.vertx.core.Context; |
| import io.vertx.core.buffer.Buffer; |
| import io.vertx.core.net.NetSocket; |
| import io.vertx.core.net.impl.NetSocketImpl; |
| |
| public class TcpConnection { |
| protected String protocol; |
| |
| // 压缩算法名字 |
| protected String zipName; |
| |
| protected NetSocket netSocket; |
| |
| // context of netSocket |
| protected Context context; |
| |
| // vertx's wrap for netty is ugly: write always lock first |
| // so we save buf in a CAS queue, and notify eventloop thread to do the real write |
| // |
| // netty: |
| // if write caller is not in network IO thread |
| // always wrap the write as a task, and put it to IO thread queue(MPSC queue) |
| // |
| // so this optimization: |
| // 1.avoid vertx's lock |
| // 2.reduce netty's task schedule |
| private final Queue<ByteBuf> writeQueue = new ConcurrentLinkedQueue<>(); |
| |
| private final AtomicLong writeQueueSize = new AtomicLong(); |
| |
| public String getProtocol() { |
| return protocol; |
| } |
| |
| public void setProtocol(String protocol) { |
| this.protocol = protocol; |
| } |
| |
| public String getZipName() { |
| return zipName; |
| } |
| |
| public void setZipName(String zipName) { |
| this.zipName = zipName; |
| } |
| |
| public void setContext(Context context) { |
| this.context = context; |
| } |
| |
| public NetSocket getNetSocket() { |
| return netSocket; |
| } |
| |
| public void initNetSocket(NetSocketImpl netSocket) { |
| this.netSocket = netSocket; |
| |
| this.context = netSocket.getContext(); |
| } |
| |
| public void write(ByteBuf buf) { |
| writeQueue.add(buf); |
| long oldSize = writeQueueSize.getAndIncrement(); |
| if (oldSize == 0) { |
| scheduleWrite(); |
| } |
| } |
| |
| // notify context thread to write |
| protected void scheduleWrite() { |
| context.runOnContext(v -> writeInContext()); |
| } |
| |
| protected void writeInContext() { |
| CompositeByteBuf cbb = ByteBufAllocator.DEFAULT.compositeBuffer(); |
| for (; ; ) { |
| ByteBuf buf = writeQueue.poll(); |
| if (buf == null) { |
| break; |
| } |
| |
| writeQueueSize.decrementAndGet(); |
| cbb.addComponent(true, buf); |
| |
| if (cbb.numComponents() == cbb.maxNumComponents()) { |
| netSocket.write(Buffer.buffer(cbb)); |
| cbb = ByteBufAllocator.DEFAULT.compositeBuffer(); |
| } |
| } |
| if (cbb.isReadable()) { |
| netSocket.write(Buffer.buffer(cbb)); |
| } |
| } |
| } |