c4dbbe39c9
Motivation: We should just add `executor()` to the `ChannelOutboundInvoker` interface and override this method in `Channel` to return `EventLoop`. Modifications: - Add `executor()` method to `ChannelOutboundInvoker` - Let `Channel` override this method and return `EventLoop`. - Adjust all usages of `eventLoop()` - Add some default implementations Result: API cleanup
333 lines
13 KiB
Java
333 lines
13 KiB
Java
/*
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* Copyright 2021 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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* https://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.kqueue;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.ByteBufAllocator;
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import io.netty.buffer.ByteBufConvertible;
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import io.netty.channel.AddressedEnvelope;
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import io.netty.channel.ChannelPipeline;
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import io.netty.channel.DefaultAddressedEnvelope;
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import io.netty.channel.EventLoop;
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import io.netty.channel.unix.DomainDatagramChannel;
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import io.netty.channel.unix.DomainDatagramChannelConfig;
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import io.netty.channel.unix.DomainDatagramPacket;
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import io.netty.channel.unix.DomainDatagramSocketAddress;
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import io.netty.channel.unix.DomainSocketAddress;
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import io.netty.channel.unix.IovArray;
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import io.netty.channel.unix.PeerCredentials;
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import io.netty.channel.unix.UnixChannelUtil;
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import io.netty.util.CharsetUtil;
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import io.netty.util.UncheckedBooleanSupplier;
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import io.netty.util.internal.StringUtil;
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import io.netty.util.internal.UnstableApi;
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import java.io.IOException;
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import java.net.SocketAddress;
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import java.nio.ByteBuffer;
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import static io.netty.channel.kqueue.BsdSocket.newSocketDomainDgram;
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@UnstableApi
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public final class KQueueDomainDatagramChannel extends AbstractKQueueDatagramChannel implements DomainDatagramChannel {
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private static final String EXPECTED_TYPES =
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" (expected: " +
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StringUtil.simpleClassName(DomainDatagramPacket.class) + ", " +
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StringUtil.simpleClassName(AddressedEnvelope.class) + '<' +
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StringUtil.simpleClassName(ByteBuf.class) + ", " +
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StringUtil.simpleClassName(DomainSocketAddress.class) + ">, " +
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StringUtil.simpleClassName(ByteBuf.class) + ')';
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private volatile boolean connected;
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private volatile DomainSocketAddress local;
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private volatile DomainSocketAddress remote;
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private final KQueueDomainDatagramChannelConfig config;
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public KQueueDomainDatagramChannel(EventLoop eventLoop) {
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this(eventLoop, newSocketDomainDgram(), false);
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}
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public KQueueDomainDatagramChannel(EventLoop eventLoop, int fd) {
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this(eventLoop, new BsdSocket(fd), true);
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}
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private KQueueDomainDatagramChannel(EventLoop eventLoop, BsdSocket socket, boolean active) {
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super(null, eventLoop, socket, active);
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config = new KQueueDomainDatagramChannelConfig(this);
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}
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@Override
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public KQueueDomainDatagramChannelConfig config() {
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return config;
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}
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@Override
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protected void doBind(SocketAddress localAddress) throws Exception {
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super.doBind(localAddress);
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local = (DomainSocketAddress) localAddress;
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active = true;
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}
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@Override
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protected void doClose() throws Exception {
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super.doClose();
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connected = active = false;
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local = null;
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remote = null;
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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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if (localAddress != null) {
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local = (DomainSocketAddress) localAddress;
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}
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remote = (DomainSocketAddress) remoteAddress;
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connected = true;
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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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protected void doDisconnect() throws Exception {
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doClose();
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}
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@Override
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protected boolean doWriteMessage(Object msg) throws Exception {
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final ByteBuf data;
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DomainSocketAddress remoteAddress;
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if (msg instanceof AddressedEnvelope) {
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@SuppressWarnings("unchecked")
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AddressedEnvelope<ByteBuf, DomainSocketAddress> envelope =
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(AddressedEnvelope<ByteBuf, DomainSocketAddress>) msg;
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data = envelope.content();
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remoteAddress = envelope.recipient();
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} else {
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data = ((ByteBufConvertible) msg).asByteBuf();
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remoteAddress = null;
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}
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final int dataLen = data.readableBytes();
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if (dataLen == 0) {
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return true;
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}
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final long writtenBytes;
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if (data.hasMemoryAddress()) {
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long memoryAddress = data.memoryAddress();
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if (remoteAddress == null) {
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writtenBytes = socket.writeAddress(memoryAddress, data.readerIndex(), data.writerIndex());
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} else {
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writtenBytes = socket.sendToAddressDomainSocket(memoryAddress, data.readerIndex(), data.writerIndex(),
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remoteAddress.path().getBytes(CharsetUtil.UTF_8));
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}
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} else if (data.nioBufferCount() > 1) {
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IovArray array = registration().cleanArray();
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array.add(data, data.readerIndex(), data.readableBytes());
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int cnt = array.count();
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assert cnt != 0;
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if (remoteAddress == null) {
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writtenBytes = socket.writevAddresses(array.memoryAddress(0), cnt);
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} else {
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writtenBytes = socket.sendToAddressesDomainSocket(array.memoryAddress(0), cnt,
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remoteAddress.path().getBytes(CharsetUtil.UTF_8));
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}
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} else {
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ByteBuffer nioData = data.internalNioBuffer(data.readerIndex(), data.readableBytes());
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if (remoteAddress == null) {
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writtenBytes = socket.write(nioData, nioData.position(), nioData.limit());
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} else {
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writtenBytes = socket.sendToDomainSocket(nioData, nioData.position(), nioData.limit(),
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remoteAddress.path().getBytes(CharsetUtil.UTF_8));
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}
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}
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return writtenBytes > 0;
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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 DomainDatagramPacket) {
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DomainDatagramPacket packet = (DomainDatagramPacket) msg;
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ByteBuf content = packet.content();
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return UnixChannelUtil.isBufferCopyNeededForWrite(content) ?
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new DomainDatagramPacket(newDirectBuffer(packet, content), packet.recipient()) : msg;
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}
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if (msg instanceof ByteBufConvertible) {
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ByteBuf buf = ((ByteBufConvertible) msg).asByteBuf();
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return UnixChannelUtil.isBufferCopyNeededForWrite(buf) ? newDirectBuffer(buf) : buf;
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}
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if (msg instanceof AddressedEnvelope) {
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@SuppressWarnings("unchecked")
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AddressedEnvelope<Object, SocketAddress> e = (AddressedEnvelope<Object, SocketAddress>) msg;
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if (e.content() instanceof ByteBufConvertible &&
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(e.recipient() == null || e.recipient() instanceof DomainSocketAddress)) {
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ByteBuf content = ((ByteBufConvertible) e.content()).asByteBuf();
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return UnixChannelUtil.isBufferCopyNeededForWrite(content) ?
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new DefaultAddressedEnvelope<>(
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newDirectBuffer(e, content), (DomainSocketAddress) e.recipient()) : e;
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}
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}
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throw new UnsupportedOperationException(
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"unsupported message type: " + StringUtil.simpleClassName(msg) + EXPECTED_TYPES);
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}
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@Override
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public boolean isActive() {
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return socket.isOpen() && (config.getActiveOnOpen() && isRegistered() || active);
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}
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@Override
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public boolean isConnected() {
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return connected;
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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 DomainSocketAddress localAddress0() {
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return local;
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}
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@Override
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protected AbstractKQueueUnsafe newUnsafe() {
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return new KQueueDomainDatagramChannelUnsafe();
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}
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/**
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* Returns the unix credentials (uid, gid, pid) of the peer
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* <a href=https://man7.org/linux/man-pages/man7/socket.7.html>SO_PEERCRED</a>
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*/
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public PeerCredentials peerCredentials() throws IOException {
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return socket.getPeerCredentials();
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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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protected DomainSocketAddress remoteAddress0() {
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return remote;
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}
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final class KQueueDomainDatagramChannelUnsafe extends AbstractKQueueUnsafe {
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@Override
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void readReady(KQueueRecvByteAllocatorHandle allocHandle) {
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assert executor().inEventLoop();
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final DomainDatagramChannelConfig config = config();
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if (shouldBreakReadReady(config)) {
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clearReadFilter0();
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return;
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}
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final ChannelPipeline pipeline = pipeline();
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final ByteBufAllocator allocator = config.getAllocator();
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allocHandle.reset(config);
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readReadyBefore();
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Throwable exception = null;
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try {
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ByteBuf byteBuf = null;
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try {
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boolean connected = isConnected();
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do {
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byteBuf = allocHandle.allocate(allocator);
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allocHandle.attemptedBytesRead(byteBuf.writableBytes());
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final DomainDatagramPacket packet;
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if (connected) {
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allocHandle.lastBytesRead(doReadBytes(byteBuf));
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if (allocHandle.lastBytesRead() <= 0) {
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// nothing was read, release the buffer.
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byteBuf.release();
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break;
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}
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packet = new DomainDatagramPacket(byteBuf, (DomainSocketAddress) localAddress(),
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(DomainSocketAddress) remoteAddress());
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} else {
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final DomainDatagramSocketAddress remoteAddress;
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if (byteBuf.hasMemoryAddress()) {
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// has a memory address so use optimized call
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remoteAddress = socket.recvFromAddressDomainSocket(byteBuf.memoryAddress(),
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byteBuf.writerIndex(), byteBuf.capacity());
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} else {
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ByteBuffer nioData = byteBuf.internalNioBuffer(
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byteBuf.writerIndex(), byteBuf.writableBytes());
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remoteAddress =
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socket.recvFromDomainSocket(nioData, nioData.position(), nioData.limit());
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}
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if (remoteAddress == null) {
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allocHandle.lastBytesRead(-1);
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byteBuf.release();
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break;
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}
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DomainSocketAddress localAddress = remoteAddress.localAddress();
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if (localAddress == null) {
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localAddress = (DomainSocketAddress) localAddress();
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}
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allocHandle.lastBytesRead(remoteAddress.receivedAmount());
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byteBuf.writerIndex(byteBuf.writerIndex() + allocHandle.lastBytesRead());
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packet = new DomainDatagramPacket(byteBuf, localAddress, remoteAddress);
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}
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allocHandle.incMessagesRead(1);
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readPending = false;
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pipeline.fireChannelRead(packet);
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byteBuf = null;
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// We use the TRUE_SUPPLIER as it is also ok to read less then what we did try to read (as long
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// as we read anything).
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} while (allocHandle.continueReading(UncheckedBooleanSupplier.TRUE_SUPPLIER));
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} catch (Throwable t) {
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if (byteBuf != null) {
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byteBuf.release();
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}
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exception = t;
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}
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allocHandle.readComplete();
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pipeline.fireChannelReadComplete();
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if (exception != null) {
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pipeline.fireExceptionCaught(exception);
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} else {
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readIfIsAutoRead();
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}
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} finally {
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readReadyFinally(config);
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}
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}
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}
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}
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