io.netty.channel.kqueue.KQueueDomainSocketChannel Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* Copyright 2016 The Netty Project
*
* The Netty Project 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:
*
* https://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 io.netty.channel.kqueue;
import io.netty.channel.Channel;
import io.netty.channel.ChannelConfig;
import io.netty.channel.ChannelOutboundBuffer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.unix.DomainSocketAddress;
import io.netty.channel.unix.DomainSocketChannel;
import io.netty.channel.unix.FileDescriptor;
import io.netty.channel.unix.PeerCredentials;
import io.netty.util.internal.UnstableApi;
import java.io.IOException;
import java.net.SocketAddress;
import static io.netty.channel.kqueue.BsdSocket.newSocketDomain;
public final class KQueueDomainSocketChannel extends AbstractKQueueStreamChannel implements DomainSocketChannel {
private final KQueueDomainSocketChannelConfig config = new KQueueDomainSocketChannelConfig(this);
private volatile DomainSocketAddress local;
private volatile DomainSocketAddress remote;
public KQueueDomainSocketChannel() {
super(null, newSocketDomain(), false);
}
public KQueueDomainSocketChannel(int fd) {
this(null, new BsdSocket(fd));
}
KQueueDomainSocketChannel(Channel parent, BsdSocket fd) {
super(parent, fd, true);
local = fd.localDomainSocketAddress();
remote = fd.remoteDomainSocketAddress();
}
@Override
protected AbstractKQueueUnsafe newUnsafe() {
return new KQueueDomainUnsafe();
}
@Override
protected DomainSocketAddress localAddress0() {
return local;
}
@Override
protected DomainSocketAddress remoteAddress0() {
return remote;
}
@Override
protected void doBind(SocketAddress localAddress) throws Exception {
socket.bind(localAddress);
local = (DomainSocketAddress) localAddress;
}
@Override
public KQueueDomainSocketChannelConfig config() {
return config;
}
@Override
protected boolean doConnect(SocketAddress remoteAddress, SocketAddress localAddress) throws Exception {
if (super.doConnect(remoteAddress, localAddress)) {
local = localAddress != null ? (DomainSocketAddress) localAddress : socket.localDomainSocketAddress();
remote = (DomainSocketAddress) remoteAddress;
return true;
}
return false;
}
@Override
public DomainSocketAddress remoteAddress() {
return (DomainSocketAddress) super.remoteAddress();
}
@Override
public DomainSocketAddress localAddress() {
return (DomainSocketAddress) super.localAddress();
}
@Override
protected int doWriteSingle(ChannelOutboundBuffer in) throws Exception {
Object msg = in.current();
if (msg instanceof FileDescriptor && socket.sendFd(((FileDescriptor) msg).intValue()) > 0) {
// File descriptor was written, so remove it.
in.remove();
return 1;
}
return super.doWriteSingle(in);
}
@Override
protected Object filterOutboundMessage(Object msg) {
if (msg instanceof FileDescriptor) {
return msg;
}
return super.filterOutboundMessage(msg);
}
/**
* Returns the unix credentials (uid, gid, pid) of the peer
* SO_PEERCRED
*/
@UnstableApi
public PeerCredentials peerCredentials() throws IOException {
return socket.getPeerCredentials();
}
private final class KQueueDomainUnsafe extends KQueueStreamUnsafe {
@Override
void readReady(KQueueRecvByteAllocatorHandle allocHandle) {
switch (config().getReadMode()) {
case BYTES:
super.readReady(allocHandle);
break;
case FILE_DESCRIPTORS:
readReadyFd();
break;
default:
throw new Error();
}
}
private void readReadyFd() {
if (socket.isInputShutdown()) {
super.clearReadFilter0();
return;
}
final ChannelConfig config = config();
final KQueueRecvByteAllocatorHandle allocHandle = recvBufAllocHandle();
final ChannelPipeline pipeline = pipeline();
allocHandle.reset(config);
readReadyBefore();
try {
readLoop: do {
// lastBytesRead represents the fd. We use lastBytesRead because it must be set so that the
// KQueueRecvByteAllocatorHandle knows if it should try to read again or not when autoRead is
// enabled.
int recvFd = socket.recvFd();
switch(recvFd) {
case 0:
allocHandle.lastBytesRead(0);
break readLoop;
case -1:
allocHandle.lastBytesRead(-1);
close(voidPromise());
return;
default:
allocHandle.lastBytesRead(1);
allocHandle.incMessagesRead(1);
readPending = false;
pipeline.fireChannelRead(new FileDescriptor(recvFd));
break;
}
} while (allocHandle.continueReading());
allocHandle.readComplete();
pipeline.fireChannelReadComplete();
} catch (Throwable t) {
allocHandle.readComplete();
pipeline.fireChannelReadComplete();
pipeline.fireExceptionCaught(t);
} finally {
readReadyFinally(config);
}
}
}
}