1fe931b6e2
Motiviation: Because of how we implemented the registration / deregistration of an EventLoop it was not possible to wrap an EventLoop implementation and use it with a Channel. Modification: - Introduce EventLoop.Unsafe which is responsible for the actual registration. - Move validation of EventLoop / Channel combo to the EventLoop - Add unit test that verifies that wrapping works Result: Be able to wrap an EventLoop and so add some extra functionality.
141 lines
4.9 KiB
Java
141 lines
4.9 KiB
Java
/*
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* Copyright 2014 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.ChannelException;
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import io.netty.channel.EventLoop;
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import io.netty.channel.socket.ServerSocketChannel;
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import io.netty.channel.socket.SocketChannel;
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import io.netty.util.concurrent.GlobalEventExecutor;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.Map;
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import java.util.concurrent.Executor;
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import static io.netty.channel.epoll.LinuxSocket.newSocketStream;
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/**
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* {@link SocketChannel} implementation that uses linux EPOLL Edge-Triggered Mode for
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* maximal performance.
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*/
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public final class EpollSocketChannel extends AbstractEpollStreamChannel implements SocketChannel {
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private final EpollSocketChannelConfig config;
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private volatile Collection<InetAddress> tcpMd5SigAddresses = Collections.emptyList();
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public EpollSocketChannel(EventLoop eventLoop) {
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super(eventLoop, newSocketStream(), false);
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config = new EpollSocketChannelConfig(this);
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}
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public EpollSocketChannel(EventLoop eventLoop, int fd) {
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super(eventLoop, fd);
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config = new EpollSocketChannelConfig(this);
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}
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EpollSocketChannel(EventLoop eventLoop, LinuxSocket fd, boolean active) {
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super(eventLoop, fd, active);
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config = new EpollSocketChannelConfig(this);
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}
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EpollSocketChannel(Channel parent, EventLoop eventLoop, LinuxSocket fd, InetSocketAddress remoteAddress) {
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super(parent, eventLoop, fd, remoteAddress);
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config = new EpollSocketChannelConfig(this);
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if (parent instanceof EpollServerSocketChannel) {
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tcpMd5SigAddresses = ((EpollServerSocketChannel) parent).tcpMd5SigAddresses();
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}
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}
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/**
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* Returns the {@code TCP_INFO} for the current socket. See <a href="http://linux.die.net/man/7/tcp">man 7 tcp</a>.
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*/
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public EpollTcpInfo tcpInfo() {
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return tcpInfo(new EpollTcpInfo());
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}
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/**
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* Updates and returns the {@code TCP_INFO} for the current socket.
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* See <a href="http://linux.die.net/man/7/tcp">man 7 tcp</a>.
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*/
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public EpollTcpInfo tcpInfo(EpollTcpInfo info) {
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try {
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socket.getTcpInfo(info);
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return info;
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} catch (IOException e) {
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throw new ChannelException(e);
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}
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}
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@Override
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public InetSocketAddress remoteAddress() {
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return (InetSocketAddress) super.remoteAddress();
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}
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@Override
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public InetSocketAddress localAddress() {
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return (InetSocketAddress) super.localAddress();
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}
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@Override
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public EpollSocketChannelConfig config() {
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return config;
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}
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@Override
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public ServerSocketChannel parent() {
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return (ServerSocketChannel) super.parent();
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}
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@Override
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protected AbstractEpollUnsafe newUnsafe() {
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return new EpollSocketChannelUnsafe();
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}
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private final class EpollSocketChannelUnsafe extends EpollStreamUnsafe {
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@Override
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protected Executor prepareToClose() {
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try {
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// Check isOpen() first as otherwise it will throw a RuntimeException
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// when call getSoLinger() as the fd is not valid anymore.
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if (isOpen() && config().getSoLinger() > 0) {
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// We need to cancel this key of the channel so we may not end up in a eventloop spin
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// because we try to read or write until the actual close happens which may be later due
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// SO_LINGER handling.
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// See https://github.com/netty/netty/issues/4449
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doDeregister();
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return GlobalEventExecutor.INSTANCE;
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}
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} catch (Throwable ignore) {
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// Ignore the error as the underlying channel may be closed in the meantime and so
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// getSoLinger() may produce an exception. In this case we just return null.
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// See https://github.com/netty/netty/issues/4449
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}
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return null;
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}
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}
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void setTcpMd5Sig(Map<InetAddress, byte[]> keys) throws IOException {
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tcpMd5SigAddresses = TcpMd5Util.newTcpMd5Sigs(this, tcpMd5SigAddresses, keys);
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}
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}
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