NioEventLoop (Netty API Reference (4.1.22.Final))

java.lang.Object
- java.util.concurrent.AbstractExecutorService
- - io.netty.util.concurrent.AbstractEventExecutor
  - - io.netty.util.concurrent.AbstractScheduledEventExecutor
    - - io.netty.util.concurrent.SingleThreadEventExecutor
      - io.netty.channel.SingleThreadEventLoop
        
        io.netty.channel.nio.NioEventLoop

All Implemented Interfaces:

EventLoop ， EventLoopGroup ， EventExecutor ， EventExecutorGroup ， OrderedEventExecutor ，java.lang.Iterable < EventExecutor >，java.util.concurrent.Executor，java.util.concurrent.ExecutorService中，java.util.concurrent.ScheduledExecutorService
```
public final class NioEventLoop
extends SingleThreadEventLoop
```
SingleThreadEventLoop实现注册Channel的Selector和这些事件循环中的多重复合。

Field Summary
- Fields inherited from class io.netty.channel.SingleThreadEventLoop
  DEFAULT_MAX_PENDING_TASKS

方法摘要

所有方法接口方法具体的方法
Modifier and Type	Method and Description
`protected void`	`cleanup()` 无所作为，子类可能会覆盖
`int`	`getIoRatio()` 返回在事件循环中花费I / O所需时间的百分比。
`protected java.util.Queue<java.lang.Runnable>`	`newTaskQueue(int maxPendingTasks)` 创建一个新的 `Queue` ，它将保存要执行的任务。
`int`	`pendingTasks()` 返回待处理任务的数量。
`protected java.lang.Runnable`	`pollTask()`
`void`	`rebuildSelector()` 用新创建的 `Selector`替换当前 `Selector`这个事件循环，以解决臭名昭着的100％CPU bug。
`void`	`register(java.nio.channels.SelectableChannel ch, int interestOps, NioTask<?> task)` 将任意 `SelectableChannel` （不一定由Netty创建）注册到此事件循环的 `Selector` 。
`protected void`	`run()`
`java.nio.channels.spi.SelectorProvider`	`selectorProvider()` 返回此`SelectorProvider`使用的SelectorProvider以获取`Selector` 。
`void`	`setIoRatio(int ioRatio)` 设置在事件循环中花费I / O所需时间的百分比。
`protected void`	`wakeup(boolean inEventLoop)`

Methods inherited from class io.netty.channel.SingleThreadEventLoop
afterRunningAllTasks, executeAfterEventLoopIteration, hasTasks, next, parent, register, register, register, wakesUpForTask

Methods inherited from class io.netty.util.concurrent.SingleThreadEventExecutor
addShutdownHook, addTask, awaitTermination, confirmShutdown, delayNanos, execute, inEventLoop, interruptThread, invokeAll, invokeAll, invokeAny, invokeAny, isShutdown, isShuttingDown, isTerminated, newTaskQueue, peekTask, pollTaskFrom, reject, reject, removeShutdownHook, removeTask, runAllTasks, runAllTasks, runAllTasksFrom, shutdown, shutdownGracefully, takeTask, terminationFuture, threadProperties, updateLastExecutionTime

Methods inherited from class io.netty.util.concurrent.AbstractScheduledEventExecutor
cancelScheduledTasks, hasScheduledTasks, nanoTime, nextScheduledTaskNano, pollScheduledTask, pollScheduledTask, schedule, schedule, scheduleAtFixedRate, scheduleWithFixedDelay

Methods inherited from class io.netty.util.concurrent.AbstractEventExecutor
inEventLoop, iterator, newFailedFuture, newProgressivePromise, newPromise, newSucceededFuture, newTaskFor, newTaskFor, safeExecute, shutdownGracefully, shutdownNow, submit, submit, submit

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.netty.util.concurrent.EventExecutor
inEventLoop, inEventLoop, newFailedFuture, newProgressivePromise, newPromise, newSucceededFuture

Methods inherited from interface io.netty.util.concurrent.EventExecutorGroup
isShuttingDown, iterator, schedule, schedule, scheduleAtFixedRate, scheduleWithFixedDelay, shutdown, shutdownGracefully, shutdownGracefully, shutdownNow, submit, submit, submit, terminationFuture

Methods inherited from interface java.util.concurrent.ExecutorService
awaitTermination, invokeAll, invokeAll, invokeAny, invokeAny, isShutdown, isTerminated

Methods inherited from interface java.util.concurrent.Executor
execute

Methods inherited from interface java.lang.Iterable
forEach, spliterator

- 方法详细信息
  - selectorProvider
```
public java.nio.channels.spi.SelectorProvider selectorProvider()
```
    返回此SelectorProvider使用的SelectorProvider以获得Selector 。
  - newTaskQueue
```
protected java.util.Queue<java.lang.Runnable> newTaskQueue(int maxPendingTasks)
```
    从类复制的描述： SingleThreadEventExecutor
    
    创建一个新的Queue ，它将保存要执行的任务。这个默认的实现将返回一个LinkedBlockingQueue但是如果你的子类SingleThreadEventExecutor不会在这个Queue上做任何阻塞调用，它可能对@Override有意义的，并返回一些不支持阻塞操作的更高性能的实现。
    
    重写：
    
    newTaskQueue SingleThreadEventExecutor
  - pendingTasks
```
public int pendingTasks()
```
    从类复制的描述： SingleThreadEventExecutor
    
    返回待处理任务的数量。 请注意，此操作可能很昂贵，因为它取决于SingleThreadEventExecutor的内部实现。 所以使用它很在乎！
    
    重写：
    
    pendingTasks在课堂上 SingleThreadEventLoop
  - register
```
public void register(java.nio.channels.SelectableChannel ch,
                     int interestOps,
                     NioTask<?> task)
```
    将任意SelectableChannel （不一定由Netty创建）注册到此事件循环的Selector 。一旦指定的SelectableChannel注册，指定的task将这一事件循环被执行时SelectableChannel已准备就绪。
  - getIoRatio
```
public int getIoRatio()
```
    返回在事件循环中花费I / O所需时间的百分比。
  - setIoRatio
```
public void setIoRatio(int ioRatio)
```
    设置在事件循环中花费I / O所需时间的百分比。默认值是50 ，这意味着事件循环将尝试花费I / O的时间与非I / O任务相同的时间。
  - rebuildSelector
```
public void rebuildSelector()
```
    用新创建的 Selector替换当前的 Selector这个事件循环，以解决臭名昭着的100％的CPU bug。
  - run
```
protected void run()
```
    Specified by:
    
    run在课堂上 SingleThreadEventExecutor
  - cleanup
```
protected void cleanup()
```
    从类复制的描述： SingleThreadEventExecutor
    
    无所作为，子类可能会覆盖
    
    重写：
    
    cleanup在课堂上 SingleThreadEventExecutor
  - pollTask
```
protected java.lang.Runnable pollTask()
```
    重写：
    
    pollTask在课堂上 SingleThreadEventExecutor
    
    另请参见：
    
    Queue.poll()
  - wakeup
```
protected void wakeup(boolean inEventLoop)
```
    重写：
    
    wakeup在课堂上 SingleThreadEventExecutor

Class NioEventLoop

Field Summary

Fields inherited from class io.netty.channel.SingleThreadEventLoop

方法摘要

Methods inherited from class io.netty.channel.SingleThreadEventLoop

Methods inherited from class io.netty.util.concurrent.SingleThreadEventExecutor

Methods inherited from class io.netty.util.concurrent.AbstractScheduledEventExecutor

Methods inherited from class io.netty.util.concurrent.AbstractEventExecutor

Methods inherited from class java.lang.Object

Methods inherited from interface io.netty.util.concurrent.EventExecutor

Methods inherited from interface io.netty.util.concurrent.EventExecutorGroup

Methods inherited from interface java.util.concurrent.ExecutorService

Methods inherited from interface java.util.concurrent.Executor

Methods inherited from interface java.lang.Iterable

方法详细信息

selectorProvider

newTaskQueue

pendingTasks

register

getIoRatio

setIoRatio

rebuildSelector

run

cleanup

pollTask

wakeup