twisted.internet.epollreactor.EPollReactor : API documentation

class documentation

class twisted.internet.epollreactor.EPollReactor(posixbase.PosixReactorBase, posixbase._PollLikeMixin): (source)

Implements interfaces: twisted.internet.interfaces.IReactorFDSet

A reactor that uses epoll(7).

Method	__init__	Initialize epoll object, file descriptor tracking dictionaries, and the base class.
Method	addReader	Add a FileDescriptor for notification of data available to read.
Method	addWriter	Add a FileDescriptor for notification of data available to write.
Method	removeReader	Remove a Selectable for notification of data available to read.
Method	removeWriter	Remove a Selectable for notification of data available to write.
Method	removeAll	Remove all selectables, and return a list of them.
Method	getReaders	Return the list of file descriptors currently monitored for input events by the reactor.
Method	getWriters	Return the list file descriptors currently monitored for output events by the reactor.
Method	doPoll	Poll the poller for new events.
Instance Variable	_poller	A `epoll` which will be used to check for I/O readiness.
Instance Variable	_selectables	A dictionary mapping integer file descriptors to instances of `FileDescriptor` which have been registered with the reactor. All `FileDescriptors` which are currently receiving read or write readiness notifications will be present as values in this dictionary.
Instance Variable	_reads	A set containing integer file descriptors. Values in this set will be registered with `_poller` for read readiness notifications which will be dispatched to the corresponding `FileDescriptor` instances in `_selectables`.
Instance Variable	_writes	A set containing integer file descriptors. Values in this set will be registered with `_poller` for write readiness notifications which will be dispatched to the corresponding `FileDescriptor` instances in `_selectables`.
Instance Variable	_continuousPolling	A `_ContinuousPolling` instance, used to handle file descriptors (e.g. filesystem files) that are not supported by `epoll(7)`.
Class Variable	_POLL_DISCONNECTED	Undocumented
Method	_add	Private method for adding a descriptor from the event loop.
Method	_remove	Private method for removing a descriptor from the event loop.

Inherited from PosixReactorBase:

Method	installWaker	Install a `waker' to allow threads and signals to wake up the IO thread.
Instance Variable	waker	Undocumented
Method	spawnProcess	Spawn a process, with a process protocol.
Method	listenUDP	Connects a given `DatagramProtocol` to the given numeric UDP port.
Method	listenMulticast	Connects a given DatagramProtocol to the given numeric UDP port.
Method	connectUNIX	Connect a client protocol to a UNIX socket.
Method	listenUNIX	Listen on a UNIX socket.
Method	listenUNIXDatagram	Connects a given `DatagramProtocol` to the given path.
Method	connectUNIXDatagram	Connects a `ConnectedDatagramProtocol` instance to a path.
Method	adoptStreamPort	Create a new `IListeningPort` from an already-initialized socket.
Method	adoptStreamConnection
Method	adoptDatagramPort	Add an existing listening SOCK_DGRAM socket to the reactor to monitor for read and write readiness.
Method	listenTCP	Connects a given protocol factory to the given numeric TCP/IP port.
Method	connectTCP	Connect a TCP client.
Method	connectSSL	Connect a client Protocol to a remote SSL socket.
Method	listenSSL	Connects a given protocol factory to the given numeric TCP/IP port. The connection is a SSL one, using contexts created by the context factory.
Instance Variable	_childWaker	`None` or a reference to the `_SIGCHLDWaker` which is used to properly notice child process termination.
Method	_handleSignals	Extend the basic signal handling logic to also support handling SIGCHLD to know when to try to reap child processes.
Method	_uninstallHandler	If a child waker was created and installed, uninstall it now.
Class Variable	_supportedAddressFamilies	Undocumented
Method	_removeAll	Remove all readers and writers, and list of removed `IReadDescriptor`s and `IWriteDescriptor`s.

Inherited from _SignalReactorMixin (via PosixReactorBase):

Method	startRunning	Extend the base implementation in order to remember whether signal handlers should be installed later.
Method	run	Undocumented
Method	mainLoop	Undocumented
Instance Variable	_installSignalHandlers	A flag which indicates whether any signal handlers will be installed during startup. This includes handlers for SIGCHLD to monitor child processes, and SIGINT, SIGTERM, and SIGBREAK to stop the reactor.
Method	_reallyStartRunning	Extend the base implementation by also installing signal handlers, if `self._installSignalHandlers` is true.

Inherited from _DisconnectSelectableMixin (via PosixReactorBase):

Method

_disconnectSelectable

Utility function for disconnecting a selectable.

Inherited from ReactorBase (via PosixReactorBase):

Instance Variable	running	See `IReactorCore.running`
Class Variable	installed	Undocumented
Instance Variable	usingThreads	Undocumented
Class Variable	__name__	Undocumented
Instance Variable	threadCallQueue	Undocumented
Method	wakeUp	Wake up the event loop.
Method	doIteration	Do one iteration over the readers and writers which have been added.
Method	resolve	Return a Deferred that will resolve a hostname.
Method	stop	See twisted.internet.interfaces.IReactorCore.stop.
Method	crash	See twisted.internet.interfaces.IReactorCore.crash.
Method	sigInt	Handle a SIGINT interrupt.
Method	sigBreak	Handle a SIGBREAK interrupt.
Method	sigTerm	Handle a SIGTERM interrupt.
Method	disconnectAll	Disconnect every reader, and writer in the system.
Method	iterate	See twisted.internet.interfaces.IReactorCore.iterate.
Method	fireSystemEvent	See twisted.internet.interfaces.IReactorCore.fireSystemEvent.
Method	addSystemEventTrigger	See twisted.internet.interfaces.IReactorCore.addSystemEventTrigger.
Method	removeSystemEventTrigger	See twisted.internet.interfaces.IReactorCore.removeSystemEventTrigger.
Method	callWhenRunning	See twisted.internet.interfaces.IReactorCore.callWhenRunning.
Method	startRunning	Method called when reactor starts: do some initialization and fire startup events.
Method	run	Undocumented
Class Variable	seconds	Undocumented
Method	callLater	See twisted.internet.interfaces.IReactorTime.callLater.
Method	getDelayedCalls	No summary
Method	timeout	Determine the longest time the reactor may sleep (waiting on I/O notification, perhaps) before it must wake up to service a time-related event.
Method	runUntilCurrent	Run all pending timed calls.
Instance Variable	threadpool	Undocumented
Instance Variable	threadpoolShutdownID	Undocumented
Method	callFromThread	Undocumented
Method	getThreadPool	See `twisted.internet.interfaces.IReactorThreads.getThreadPool`.
Method	callInThread	See `twisted.internet.interfaces.IReactorInThreads.callInThread`.
Method	suggestThreadPoolSize	See `twisted.internet.interfaces.IReactorThreads.suggestThreadPoolSize`.
Instance Variable	_stopped	A flag which is true between paired calls to `reactor.run` and `reactor.stop`. This should be replaced with an explicit state machine.
Instance Variable	_justStopped	A flag which is true between the time `reactor.stop` is called and the time the shutdown system event is fired. This is used to determine whether that event should be fired after each iteration through the mainloop. This should be replaced with an explicit state machine.
Instance Variable	_started	A flag which is true from the time `reactor.run` is called until the time `reactor.run` returns. This is used to prevent calls to `reactor.run` on a running reactor. This should be replaced with an explicit state machine.
Instance Variable	_registerAsIOThread	A flag controlling whether the reactor will register the thread it is running in as the I/O thread when it starts. If `True`, registration will be done, otherwise it will not be.
Instance Variable	_exitSignal	See `_ISupportsExitSignalCapturing._exitSignal`
Instance Variable	_eventTriggers	Undocumented
Instance Variable	_pendingTimedCalls	Undocumented
Instance Variable	_newTimedCalls	Undocumented
Instance Variable	_cancellations	Undocumented
Instance Variable	_startedBefore	Undocumented
Instance Variable	_internalReaders	Undocumented
Class Variable	_lock	Undocumented
Method	_reallyStartRunning	Method called to transition to the running state. This should happen in the during startup event trigger phase.
Method	_moveCallLaterSooner	Undocumented
Method	_cancelCallLater	Undocumented
Method	_insertNewDelayedCalls	Undocumented
Method	_checkProcessArgs	Check for valid arguments and environment to spawnProcess.
Instance Variable	_threadpoolStartupID	Undocumented
Method	_initThreads	Undocumented
Method	_initThreadPool	Create the threadpool accessible with callFromThread.
Method	_stopThreadPool	No summary

Inherited from PluggableResolverMixin (via PosixReactorBase, ReactorBase):

Instance Variable	resolver	The installed `IResolverSimple`.
Method	installResolver	See `IReactorPluggableResolver`.
Method	installNameResolver	See `IReactorPluggableNameResolver`.
Property	nameResolver	Implementation of read-only `IReactorPluggableNameResolver.nameResolver`.
Instance Variable	_nameResolver	The installed `IHostnameResolver`.

Inherited from _PollLikeMixin:

Method

_doReadOrWrite

fd is available for read or write, do the work and raise errors if necessary.

_poller = (source)

A epoll which will be used to check for I/O readiness.

_selectables = (source)

A dictionary mapping integer file descriptors to instances of FileDescriptor which have been registered with the reactor. All FileDescriptors which are currently receiving read or write readiness notifications will be present as values in this dictionary.

(type: dict)

_reads = (source)

A set containing integer file descriptors. Values in this set will be registered with _poller for read readiness notifications which will be dispatched to the corresponding FileDescriptor instances in _selectables.

(type: set)

_writes = (source)

A set containing integer file descriptors. Values in this set will be registered with _poller for write readiness notifications which will be dispatched to the corresponding FileDescriptor instances in _selectables.

(type: set)

_continuousPolling = (source)

A _ContinuousPolling instance, used to handle file descriptors (e.g. filesystem files) that are not supported by epoll(7).

_POLL_DISCONNECTED = (source)

Undocumented

def __init__(self): (source)

overrides twisted.internet.base.ReactorBase.__init__

Initialize epoll object, file descriptor tracking dictionaries, and the base class.

def _add(self, xer, primary, other, selectables, event, antievent): (source)

Private method for adding a descriptor from the event loop.

It takes care of adding it if new or modifying it if already added for another state (read -> read/write for example).

def addReader(self, reader): (source)