io.netty.channel.kqueue

Class KQueueEventLoop

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.kqueue.KQueueEventLoop

All Implemented Interfaces:

EventLoop, EventLoopGroup, EventExecutor, EventExecutorGroup, OrderedEventExecutor, java.lang.Iterable<EventExecutor>, java.util.concurrent.Executor, java.util.concurrent.ExecutorService, java.util.concurrent.ScheduledExecutorService

final class KQueueEventLoop
extends SingleThreadEventLoop

EventLoop which uses kqueue under the covers. Only works on BSD!

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	allowGrowing
private KQueueEventArray	changeList
private KQueueEventArray	eventList
private int	ioRatio
private IovArray	iovArray
private NativeLongArray	jniChannelPointers
private static int	KQUEUE_WAKE_UP_IDENT
private FileDescriptor	kqueueFd
private static InternalLogger	logger
private java.util.concurrent.Callable<java.lang.Integer>	pendingTasksCallable
private IntSupplier	selectNowSupplier
private SelectStrategy	selectStrategy
private static java.util.concurrent.atomic.AtomicIntegerFieldUpdater<KQueueEventLoop>	WAKEN_UP_UPDATER
private int	wakenUp

Fields inherited from class io.netty.channel.SingleThreadEventLoop

DEFAULT_MAX_PENDING_TASKS

Constructor Summary

Constructors

Constructor and Description
KQueueEventLoop(EventLoopGroup parent, java.util.concurrent.Executor executor, int maxEvents, SelectStrategy strategy, RejectedExecutionHandler rejectedExecutionHandler)

Method Summary

Modifier and Type	Method and Description
(package private) IovArray	cleanArray() Return a cleared IovArray that can be used for writes in this EventLoop.
protected void	cleanup() Do nothing, sub-classes may override
private void	closeAll()
private void	deleteJniChannelPointers()
(package private) void	evSet(AbstractKQueueChannel ch, short filter, short flags, int fflags)
int	getIoRatio() Returns the percentage of the desired amount of time spent for I/O in the event loop.
private static void	handleLoopException(java.lang.Throwable t)
private int	kqueueWait(boolean oldWakeup)
private int	kqueueWait(int timeoutSec, int timeoutNs)
private int	kqueueWaitNow()
protected java.util.Queue<java.lang.Runnable>	newTaskQueue(int maxPendingTasks) Create a new Queue which will holds the tasks to execute.
int	pendingTasks() Return the number of tasks that are pending for processing.
private void	processReady(int ready)
(package private) void	remove(AbstractKQueueChannel ch)
protected void	run()
void	setIoRatio(int ioRatio) Sets the percentage of the desired amount of time spent for I/O in the event loop.
private void	wakeup()
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, pollTask, 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

Field Detail

logger

private static final InternalLogger logger

WAKEN_UP_UPDATER

private static final java.util.concurrent.atomic.AtomicIntegerFieldUpdater<KQueueEventLoop> WAKEN_UP_UPDATER

KQUEUE_WAKE_UP_IDENT

private static final int KQUEUE_WAKE_UP_IDENT

See Also:

Constant Field Values

jniChannelPointers

private final NativeLongArray jniChannelPointers

allowGrowing

private final boolean allowGrowing

kqueueFd

private final FileDescriptor kqueueFd

changeList

private final KQueueEventArray changeList

eventList

private final KQueueEventArray eventList

selectStrategy

private final SelectStrategy selectStrategy

iovArray

private final IovArray iovArray

selectNowSupplier

private final IntSupplier selectNowSupplier

pendingTasksCallable

private final java.util.concurrent.Callable<java.lang.Integer> pendingTasksCallable

wakenUp

private volatile int wakenUp

ioRatio

private volatile int ioRatio

Constructor Detail

KQueueEventLoop

KQueueEventLoop(EventLoopGroup parent,
                java.util.concurrent.Executor executor,
                int maxEvents,
                SelectStrategy strategy,
                RejectedExecutionHandler rejectedExecutionHandler)

Method Detail

evSet

void evSet(AbstractKQueueChannel ch,
           short filter,
           short flags,
           int fflags)

remove

void remove(AbstractKQueueChannel ch)
     throws java.io.IOException

Throws:

java.io.IOException

cleanArray

IovArray cleanArray()

Return a cleared IovArray that can be used for writes in this EventLoop.

wakeup

protected void wakeup(boolean inEventLoop)

Overrides:

wakeup in class SingleThreadEventExecutor

wakeup

private void wakeup()

kqueueWait

private int kqueueWait(boolean oldWakeup)
                throws java.io.IOException

Throws:

java.io.IOException

kqueueWaitNow

private int kqueueWaitNow()
                   throws java.io.IOException

Throws:

java.io.IOException

kqueueWait

private int kqueueWait(int timeoutSec,
                       int timeoutNs)
                throws java.io.IOException

Throws:

java.io.IOException

deleteJniChannelPointers

private void deleteJniChannelPointers()

processReady

private void processReady(int ready)

run

protected void run()

Specified by:

run in class SingleThreadEventExecutor

newTaskQueue

protected java.util.Queue<java.lang.Runnable> newTaskQueue(int maxPendingTasks)

Description copied from class: SingleThreadEventExecutor

Create a new Queue which will holds the tasks to execute. This default implementation will return a LinkedBlockingQueue but if your sub-class of SingleThreadEventExecutor will not do any blocking calls on the this Queue it may make sense to @Override this and return some more performant implementation that does not support blocking operations at all.

Overrides:

newTaskQueue in class SingleThreadEventExecutor

pendingTasks

public int pendingTasks()

Description copied from class: SingleThreadEventExecutor

Return the number of tasks that are pending for processing. Be aware that this operation may be expensive as it depends on the internal implementation of the SingleThreadEventExecutor. So use it was care!

Overrides:

pendingTasks in class SingleThreadEventLoop

getIoRatio

public int getIoRatio()

Returns the percentage of the desired amount of time spent for I/O in the event loop.

setIoRatio

public void setIoRatio(int ioRatio)

Sets the percentage of the desired amount of time spent for I/O in the event loop. The default value is 50, which means the event loop will try to spend the same amount of time for I/O as for non-I/O tasks.

cleanup

protected void cleanup()

Description copied from class: SingleThreadEventExecutor

Do nothing, sub-classes may override

Overrides:

cleanup in class SingleThreadEventExecutor

closeAll

private void closeAll()

handleLoopException

private static void handleLoopException(java.lang.Throwable t)