Public Member Functions | Public Attributes | Static Public Attributes | Private Member Functions | Private Attributes | Static Private Attributes
tornado.process.Subprocess Class Reference

List of all members.

Public Member Functions

def __init__
def initialize
def set_exit_callback
def uninitialize

Public Attributes

 io_loop
 proc
 returncode
 stderr
 stdin
 stdout

Static Public Attributes

tuple STREAM = object()

Private Member Functions

def _cleanup
def _set_returncode
def _try_cleanup_process

Private Attributes

 _exit_callback

Static Private Attributes

 _initialized = False
dictionary _waiting = {}

Detailed Description

Wraps ``subprocess.Popen`` with IOStream support.

The constructor is the same as ``subprocess.Popen`` with the following
additions:

* ``stdin``, ``stdout``, and ``stderr`` may have the value
  ``tornado.process.Subprocess.STREAM``, which will make the corresponding
  attribute of the resulting Subprocess a `.PipeIOStream`.
* A new keyword argument ``io_loop`` may be used to pass in an IOLoop.

Definition at line 184 of file process.py.


Constructor & Destructor Documentation

def tornado.process.Subprocess.__init__ (   self,
  args,
  kwargs 
)

Definition at line 200 of file process.py.


Member Function Documentation

def tornado.process.Subprocess._cleanup (   cls) [private]

Definition at line 285 of file process.py.

def tornado.process.Subprocess._set_returncode (   self,
  status 
) [private]

Definition at line 303 of file process.py.

def tornado.process.Subprocess._try_cleanup_process (   cls,
  pid 
) [private]

Definition at line 290 of file process.py.

def tornado.process.Subprocess.initialize (   cls,
  io_loop = None 
)
Initializes the ``SIGCHILD`` handler.

The signal handler is run on an `.IOLoop` to avoid locking issues.
Note that the `.IOLoop` used for signal handling need not be the
same one used by individual Subprocess objects (as long as the
``IOLoops`` are each running in separate threads).

Definition at line 259 of file process.py.

def tornado.process.Subprocess.set_exit_callback (   self,
  callback 
)
Runs ``callback`` when this process exits.

The callback takes one argument, the return code of the process.

This method uses a ``SIGCHILD`` handler, which is a global setting
and may conflict if you have other libraries trying to handle the
same signal.  If you are using more than one ``IOLoop`` it may
be necessary to call `Subprocess.initialize` first to designate
one ``IOLoop`` to run the signal handlers.

In many cases a close callback on the stdout or stderr streams
can be used as an alternative to an exit callback if the
signal handler is causing a problem.

Definition at line 238 of file process.py.

Removes the ``SIGCHILD`` handler.

Definition at line 277 of file process.py.


Member Data Documentation

Definition at line 200 of file process.py.

tornado::process.Subprocess::_initialized = False [static, private]

Definition at line 197 of file process.py.

dictionary tornado::process.Subprocess::_waiting = {} [static, private]

Definition at line 198 of file process.py.

Definition at line 200 of file process.py.

Definition at line 200 of file process.py.

Definition at line 200 of file process.py.

Definition at line 200 of file process.py.

Definition at line 200 of file process.py.

Definition at line 200 of file process.py.

tuple tornado::process.Subprocess::STREAM = object() [static]

Definition at line 195 of file process.py.


The documentation for this class was generated from the following file:


rosbridge_server
Author(s): Jonathan Mace
autogenerated on Thu Jun 6 2019 21:51:51