t.i.p.PosixReactorBase(_SignalReactorMixin, ReactorBase) : class documentation

Part of twisted.internet.posixbase View Source View In Hierarchy

Known subclasses: twisted.internet._threadedselect.ThreadedSelectReactor, twisted.internet.cfreactor.CFReactor, twisted.internet.default.SelectReactor, twisted.internet.epollreactor.EPollReactor, twisted.internet.gtk2reactor.Gtk2Reactor, twisted.internet.gtkreactor.GtkReactor, twisted.internet.kqreactor.KQueueReactor, twisted.internet.pollreactor.PollReactor, twisted.internet.win32eventreactor.Win32Reactor

Implements interfaces: twisted.internet.interfaces._IReactorArbitrary, twisted.internet.interfaces.IReactorMulticast, twisted.internet.interfaces.IReactorProcess, twisted.internet.interfaces.IReactorSSL, twisted.internet.interfaces.IReactorTCP, twisted.internet.interfaces.IReactorUDP, twisted.internet.interfaces.IReactorUNIX, twisted.internet.interfaces.IReactorUNIXDatagram

A basis for reactors that use file descriptors.
Instance Variables_childWakerNone or a reference to the _SIGCHLDWaker which is used to properly notice child process termination.
Method installWaker Install a `waker' to allow threads and signals to wake up the IO thread.
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
Method listenUNIX
Method listenUNIXDatagram Connects a given DatagramProtocol to the given path.
Method connectUNIXDatagram Connects a ConnectedDatagramProtocol instance to a path.
Method listenTCP
Method connectTCP
Method connectSSL
Method listenSSL
Method listenWith Undocumented
Method connectWith Undocumented
Method _disconnectSelectable Utility function for disconnecting a selectable.
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.
Method _removeAll Remove all readers and writers, and list of removed IReadDescriptors and IWriteDescriptors.

Inherited from _SignalReactorMixin:

Method startRunning Extend the base implementation in order to remember whether signal handlers should be installed later.
Method run Undocumented
Method mainLoop Undocumented
Method _reallyStartRunning Extend the base implementation by also installing signal handlers, if self._installSignalHandlers is true.

Inherited from ReactorBase:

Method __init__ Undocumented
Method installResolver Set the internal resolver to use to for name lookups.
Method wakeUp Wake up the event loop.
Method doIteration Do one iteration over the readers and writers which have been added.
Method addReader Undocumented
Method addWriter Undocumented
Method removeReader Undocumented
Method removeWriter Undocumented
Method removeAll Undocumented
Method getReaders Undocumented
Method getWriters Undocumented
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 callLater See twisted.internet.interfaces.IReactorTime.callLater.
Method getDelayedCalls No summary
Method timeout Undocumented
Method runUntilCurrent Run all pending timed calls.
Method callFromThread 0 See twisted.internet.interfaces.IReactorThreads.callFromThread.
Method getThreadPool See twisted.internet.interfaces.IReactorThreads.getThreadPool.
Method callInThread See twisted.internet.interfaces.IReactorThreads.callInThread.
Method suggestThreadPoolSize See twisted.internet.interfaces.IReactorThreads.suggestThreadPoolSize.
Method callFromThread Cause a function to be executed by the reactor thread.
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.
Method _initThreads Undocumented
Method _initThreadPool Create the threadpool accessible with callFromThread.
Method _stopThreadPool No summary
def _disconnectSelectable(self, selectable, why, isRead, faildict={error.ConnectionDone:failure.Failure(error.ConnectionDone()),error.ConnectionLost:failure.Failure(error.ConnectionLost()),}): (source)

Utility function for disconnecting a selectable.

Supports half-close notification, isRead should be boolean indicating whether error resulted from doRead().
def installWaker(self): (source)
overrides twisted.internet.base.ReactorBase.installWaker
overridden in twisted.internet.cfreactor.CFReactor

Install a `waker' to allow threads and signals to wake up the IO thread.

We use the self-pipe trick (http://cr.yp.to/docs/selfpipe.html) to wake the reactor. On Windows we use a pair of sockets.
def _handleSignals(self): (source)
overrides twisted.internet.base._SignalReactorMixin._handleSignals
overridden in twisted.internet.gtk2reactor.Gtk2Reactor
Extend the basic signal handling logic to also support handling SIGCHLD to know when to try to reap child processes.
def _uninstallHandler(self): (source)
overrides twisted.internet.base.ReactorBase._uninstallHandler

If a child waker was created and installed, uninstall it now.

Since this disables reactor functionality and is only called when the reactor is stopping, it doesn't provide any directly useful functionality, but the cleanup of reactor-related process-global state that it does helps in unit tests involving multiple reactors and is generally just a nice thing.
def spawnProcess(self, processProtocol, executable, args=(), env={}, path=None, uid=None, gid=None, usePTY=0, childFDs=None): (source)
from twisted.internet.interfaces.IReactorProcess
overridden in twisted.internet.win32eventreactor.Win32Reactor
Spawn a process, with a process protocol.
ParametersprocessProtocolAn object which will be notified of all events related to the created process. (type: IProcessProtocol provider )
executablethe file name to spawn - the full path should be used.
argsthe command line arguments to pass to the process; a sequence of strings. The first string should be the executable's name.
envthe environment variables to pass to the child process. The resulting behavior varies between platforms. If
  • env is not set:
    • On POSIX: pass an empty environment.
    • On Windows: pass os.environ.
  • env is None:
    • On POSIX: pass os.environ.
    • On Windows: pass os.environ.
  • env is a dict:
    • On POSIX: pass the key/value pairs in env as the complete environment.
    • On Windows: update os.environ with the key/value pairs in the dict before passing it. As a consequence of bug #1640, passing keys with empty values in an effort to unset environment variables won't unset them.
(type: a dict mapping str to str, or None. )
paththe path to run the subprocess in - defaults to the current directory.
uiduser ID to run the subprocess as. (Only available on POSIX systems.)
gidgroup ID to run the subprocess as. (Only available on POSIX systems.)
usePTYif true, run this process in a pseudo-terminal. optionally a tuple of (masterfd, slavefd, ttyname), in which case use those file descriptors. (Not available on all systems.)
childFDs

A dictionary mapping file descriptors in the new child process to an integer or to the string 'r' or 'w'.

If the value is an integer, it specifies a file descriptor in the parent process which will be mapped to a file descriptor (specified by the key) in the child process. This is useful for things like inetd and shell-like file redirection.

If it is the string 'r', a pipe will be created and attached to the child at that file descriptor: the child will be able to write to that file descriptor and the parent will receive read notification via the IProcessProtocol.childDataReceived callback. This is useful for the child's stdout and stderr.

If it is the string 'w', similar setup to the previous case will occur, with the pipe being readable by the child instead of writeable. The parent process can write to that file descriptor using IProcessTransport.writeToChild. This is useful for the child's stdin.

If childFDs is not passed, the default behaviour is to use a mapping that opens the usual stdin/stdout/stderr pipes.
ReturnsAn object which provides IProcessTransport.
RaisesOSErrorRaised with errno EAGAIN or ENOMEM if there are insufficient system resources to create a new process.
See Alsotwisted.internet.protocol.ProcessProtocol
def listenUDP(self, port, protocol, interface='', maxPacketSize=8192): (source)
from twisted.internet.interfaces.IReactorUDP
Connects a given DatagramProtocol to the given numeric UDP port.
Returnsobject conforming to IListeningPort.
def listenMulticast(self, port, protocol, interface='', maxPacketSize=8192, listenMultiple=False): (source)
from twisted.internet.interfaces.IReactorMulticast

Connects a given DatagramProtocol to the given numeric UDP port.

EXPERIMENTAL.
Returnsobject conforming to IListeningPort.
def connectUNIX(self, address, factory, timeout=30, checkPID=0): (source)
from twisted.internet.interfaces.IReactorUNIX
overridden in twisted.manhole.gladereactor.GladeReactor
See Alsotwisted.internet.interfaces.IReactorUNIX.connectUNIX
def listenUNIX(self, address, factory, backlog=50, mode=438, wantPID=0): (source)
from twisted.internet.interfaces.IReactorUNIX
overridden in twisted.manhole.gladereactor.GladeReactor
See Alsotwisted.internet.interfaces.IReactorUNIX.listenUNIX
def listenUNIXDatagram(self, address, protocol, maxPacketSize=8192, mode=438): (source)
from twisted.internet.interfaces.IReactorUNIXDatagram

Connects a given DatagramProtocol to the given path.

EXPERIMENTAL.
Returnsobject conforming to IListeningPort.
def connectUNIXDatagram(self, address, protocol, maxPacketSize=8192, mode=438, bindAddress=None): (source)
from twisted.internet.interfaces.IReactorUNIXDatagram

Connects a ConnectedDatagramProtocol instance to a path.

EXPERIMENTAL.
def listenTCP(self, port, factory, backlog=50, interface=''): (source)
from twisted.internet.interfaces.IReactorTCP
overridden in twisted.manhole.gladereactor.GladeReactor
See Alsotwisted.internet.interfaces.IReactorTCP.listenTCP
def connectTCP(self, host, port, factory, timeout=30, bindAddress=None): (source)
from twisted.internet.interfaces.IReactorTCP
overridden in twisted.manhole.gladereactor.GladeReactor
See Alsotwisted.internet.interfaces.IReactorTCP.connectTCP
def connectSSL(self, host, port, factory, contextFactory, timeout=30, bindAddress=None): (source)
from twisted.internet.interfaces.IReactorSSL
overridden in twisted.manhole.gladereactor.GladeReactor
See Alsotwisted.internet.interfaces.IReactorSSL.connectSSL
def listenSSL(self, port, factory, contextFactory, backlog=50, interface=''): (source)
from twisted.internet.interfaces.IReactorSSL
overridden in twisted.manhole.gladereactor.GladeReactor
See Alsotwisted.internet.interfaces.IReactorSSL.listenSSL
def listenWith(self, portType, *args, **kw): (source)
Undocumented
def connectWith(self, connectorType, *args, **kw): (source)
Undocumented
def _removeAll(self, readers, writers): (source)

Remove all readers and writers, and list of removed IReadDescriptors and IWriteDescriptors.

Meant for calling from subclasses, to implement removeAll, like: 
 def removeAll(self):
     return self._removeAll(self._reads, self._writes)
where self._reads and self._writes are iterables.
API Documentation for Twisted, generated by pydoctor at 2011-10-27 16:27:37.