48f2e705d9
Motivation: Due to the complexity of handling deregistration and re-registration of a channel, we previously decided to remove the deregister() operation completely to simplify our code. However, we realized that it shouldn't be that complicated to implement it during our discussion about making I/O scheduling more flexible and more customizable [1], and thus the removal of deregistration and re-registration is unnecessary now. Modification: - Revert commit c149f4bcc0c0d02aa1abcd5e39c155a9e598822e - Revert commit e743a27e752f0badaf71688457793d0aa365a3ac - Make some additional adjustments Result: - deregister(), fireChannelUnregistered(), and channelRegistered() were added back.. - Channel constructors do not require an EventLoop anymore. [1] https://github.com/netty/netty/issues/2250
83 lines
2.6 KiB
Java
83 lines
2.6 KiB
Java
/*
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* Copyright 2012 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;
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/**
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* {@link SingleThreadEventLoop} which is used to handle OIO {@link Channel}'s. So in general there will be
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* one {@link ThreadPerChannelEventLoop} per {@link Channel}.
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*
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*/
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public class ThreadPerChannelEventLoop extends SingleThreadEventLoop {
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private final ThreadPerChannelEventLoopGroup parent;
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private Channel ch;
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public ThreadPerChannelEventLoop(ThreadPerChannelEventLoopGroup parent) {
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super(parent, parent.executor, true);
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this.parent = parent;
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}
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@Override
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public ChannelFuture register(Channel channel, ChannelPromise promise) {
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return super.register(channel, promise).addListener(new ChannelFutureListener() {
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@Override
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@SuppressWarnings("unchecked")
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public void operationComplete(ChannelFuture future) throws Exception {
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if (future.isSuccess()) {
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ch = future.channel();
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} else {
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deregister();
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}
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}
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});
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}
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@Override
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protected void run() {
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for (;;) {
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Runnable task = takeTask();
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if (task != null) {
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task.run();
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updateLastExecutionTime();
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}
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Channel ch = this.ch;
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if (isShuttingDown()) {
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if (ch != null) {
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ch.unsafe().close(ch.unsafe().voidPromise());
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}
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if (confirmShutdown()) {
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break;
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}
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} else {
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if (ch != null) {
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// Handle deregistration
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if (!ch.isRegistered()) {
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runAllTasks();
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deregister();
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}
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}
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}
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}
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}
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protected void deregister() {
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ch = null;
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parent.activeChildren.remove(this);
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parent.idleChildren.add(this);
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}
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}
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