7becfc5e06
Motivation: We should use OneTimeTask where possible to reduce object creation. Modifications: Replace Runnable with OneTimeTask Result: Less object creation
204 lines
6.7 KiB
Java
204 lines
6.7 KiB
Java
/*
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* Copyright 2015 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.channel.epoll;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelConfig;
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import io.netty.channel.ChannelOutboundBuffer;
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import io.netty.channel.ChannelPipeline;
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import io.netty.channel.unix.DomainSocketAddress;
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import io.netty.channel.unix.DomainSocketChannel;
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import io.netty.channel.unix.FileDescriptor;
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import io.netty.channel.unix.Socket;
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import io.netty.util.internal.OneTimeTask;
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import java.net.SocketAddress;
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import static io.netty.channel.unix.Socket.newSocketDomain;
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public final class EpollDomainSocketChannel extends AbstractEpollStreamChannel implements DomainSocketChannel {
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private final EpollDomainSocketChannelConfig config = new EpollDomainSocketChannelConfig(this);
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private volatile DomainSocketAddress local;
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private volatile DomainSocketAddress remote;
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public EpollDomainSocketChannel() {
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super(newSocketDomain(), false);
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}
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/**
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* @deprecated Use {@link #EpollDomainSocketChannel(Channel, Socket)}.
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*/
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@Deprecated
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public EpollDomainSocketChannel(Channel parent, FileDescriptor fd) {
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super(parent, new Socket(fd.intValue()));
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}
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/**
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* @deprecated Use {@link #EpollDomainSocketChannel(Socket, boolean)}.
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* <p>
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* Creates a new {@link EpollDomainSocketChannel} from an existing {@link FileDescriptor}
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*/
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@Deprecated
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public EpollDomainSocketChannel(FileDescriptor fd) {
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super(fd);
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}
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public EpollDomainSocketChannel(Channel parent, Socket fd) {
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super(parent, fd);
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}
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/**
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* Creates a new {@link EpollDomainSocketChannel} from an existing {@link FileDescriptor}
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*/
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public EpollDomainSocketChannel(Socket fd, boolean active) {
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super(fd, active);
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}
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@Override
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protected AbstractEpollUnsafe newUnsafe() {
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return new EpollDomainUnsafe();
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}
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@Override
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protected DomainSocketAddress localAddress0() {
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return local;
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}
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@Override
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protected DomainSocketAddress remoteAddress0() {
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return remote;
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}
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@Override
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protected void doBind(SocketAddress localAddress) throws Exception {
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fd().bind(localAddress);
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local = (DomainSocketAddress) localAddress;
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}
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@Override
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public EpollDomainSocketChannelConfig config() {
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return config;
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}
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@Override
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protected boolean doConnect(SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
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if (super.doConnect(remoteAddress, localAddress)) {
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local = (DomainSocketAddress) localAddress;
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remote = (DomainSocketAddress) remoteAddress;
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return true;
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}
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return false;
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}
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@Override
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public DomainSocketAddress remoteAddress() {
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return (DomainSocketAddress) super.remoteAddress();
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}
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@Override
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public DomainSocketAddress localAddress() {
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return (DomainSocketAddress) super.localAddress();
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}
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@Override
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protected boolean doWriteSingle(ChannelOutboundBuffer in, int writeSpinCount) throws Exception {
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Object msg = in.current();
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if (msg instanceof FileDescriptor && Native.sendFd(fd().intValue(), ((FileDescriptor) msg).intValue()) > 0) {
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// File descriptor was written, so remove it.
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in.remove();
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return true;
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}
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return super.doWriteSingle(in, writeSpinCount);
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}
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@Override
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protected Object filterOutboundMessage(Object msg) {
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if (msg instanceof FileDescriptor) {
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return msg;
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}
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return super.filterOutboundMessage(msg);
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}
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private final class EpollDomainUnsafe extends EpollStreamUnsafe {
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@Override
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void epollInReady() {
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switch (config().getReadMode()) {
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case BYTES:
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super.epollInReady();
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break;
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case FILE_DESCRIPTORS:
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epollInReadFd();
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break;
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default:
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throw new Error();
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}
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}
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private void epollInReadFd() {
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if (fd().isInputShutdown()) {
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return;
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}
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boolean edgeTriggered = isFlagSet(Native.EPOLLET);
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final ChannelConfig config = config();
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if (!readPending && !edgeTriggered && !config.isAutoRead()) {
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// ChannelConfig.setAutoRead(false) was called in the meantime
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clearEpollIn0();
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return;
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}
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final ChannelPipeline pipeline = pipeline();
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final EpollRecvByteAllocatorHandle allocHandle = recvBufAllocHandle();
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allocHandle.reset(config);
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try {
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do {
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int socketFd = Native.recvFd(fd().intValue());
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if (socketFd == 0) {
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break;
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}
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if (socketFd == -1) {
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close(voidPromise());
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return;
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}
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readPending = false;
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allocHandle.incMessagesRead(1);
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pipeline.fireChannelRead(new FileDescriptor(socketFd));
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} while (allocHandle.continueReading());
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allocHandle.readComplete();
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pipeline.fireChannelReadComplete();
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} catch (Throwable t) {
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allocHandle.readComplete();
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pipeline.fireChannelReadComplete();
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pipeline.fireExceptionCaught(t);
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checkResetEpollIn(edgeTriggered);
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} finally {
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// Check if there is a readPending which was not processed yet.
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// This could be for two reasons:
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// * The user called Channel.read() or ChannelHandlerContext.read() in channelRead(...) method
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// * The user called Channel.read() or ChannelHandlerContext.read() in channelReadComplete(...) method
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//
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// See https://github.com/netty/netty/issues/2254
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if (!readPending && !config.isAutoRead()) {
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clearEpollIn0();
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}
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}
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}
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}
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}
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