Current File : //usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyo
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� � YZ d S( s? A utility class to send to and recv from a non-blocking socket.i����( t with_statementN( t jsonapii ( t IOLoop( t gen_log( t
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t | d � S( Nt __call__( t hasattr( t obj( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt <lambda>2 s t ZMQStreamc B� s� e Z d Z d# Z d# Z d# Z d# Z d# Z d# Z d# Z
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d# d � Z e Z d d# d � Z d d d# d � Z d � Z e j! e j" Bd# d � Z# d � Z$ d# d � Z% d � Z& d � Z' d � Z( d � Z) d � Z* d � Z+ d � Z, d � Z- d � Z. d � Z/ d � Z0 d! � Z1 d" � Z2 RS($ s> A utility class to register callbacks when a zmq socket sends and receives
For use with zmq.eventloop.ioloop
There are three main methods
Methods:
* **on_recv(callback, copy=True):**
register a callback to be run every time the socket has something to receive
* **on_send(callback):**
register a callback to be run every time you call send
* **send(self, msg, flags=0, copy=False, callback=None):**
perform a send that will trigger the callback
if callback is passed, on_send is also called.
There are also send_multipart(), send_json(), send_pyobj()
Three other methods for deactivating the callbacks:
* **stop_on_recv():**
turn off the recv callback
* **stop_on_send():**
turn off the send callback
which simply call ``on_<evt>(None)``.
The entire socket interface, excluding direct recv methods, is also
provided, primarily through direct-linking the methods.
e.g.
>>> stream.bind is stream.socket.bind
True
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_recv_copyt _flushedt ERRORt _statet _init_io_statet bindt bind_to_random_portt connectt
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getsockoptt setsockopt_stringt getsockopt_stringt setsockopt_unicodet getsockopt_unicode( t selfR R ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt __init__e s(
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| j d � S( s) Disable callback and automatic receiving.N( t on_recvR ( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt stop_on_recv� s c C� s
| j d � S( s Disable callback on sending.N( t on_sendR ( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt stop_on_send� s c C� s t j d � d S( s DEPRECATED, does nothings( on_err does nothing, and will be removedN( R t warn( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt stop_on_err� s c C� s t j d � d S( s DEPRECATED, does nothings( on_err does nothing, and will be removedN( R R. ( R( t callback( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt on_err� s c C� s^ | j � t j | � | _ | | _ | d k rG | j | j j � n | j | j j � d S( s� Register a callback for when a message is ready to recv.
There can be only one callback registered at a time, so each
call to `on_recv` replaces previously registered callbacks.
on_recv(None) disables recv event polling.
Use on_recv_stream(callback) instead, to register a callback that will receive
both this ZMQStream and the message, instead of just the message.
Parameters
----------
callback : callable
callback must take exactly one argument, which will be a
list, as returned by socket.recv_multipart()
if callback is None, recv callbacks are disabled.
copy : bool
copy is passed directly to recv, so if copy is False,
callback will receive Message objects. If copy is True,
then callback will receive bytes/str objects.
Returns : None
N(
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_check_closedR t wrapR R R t _drop_io_stateR t READt
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c � s< � d k r � j � n � j � � f d � d | �d S( s" Same as on_recv, but callback will get this stream as first argument
callback must take exactly two arguments, as it will be called as::
callback(stream, msg)
Useful when a single callback should be used with multiple streams.
c � s
� � | � S( N( ( t msg( R0 R( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR � s R7 N( R R+ R* ( R( R0 R7 ( ( R0 R( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt on_recv_stream� s
c C� s | j � t j | � | _ d S( s� Register a callback to be called on each send
There will be two arguments::
callback(msg, status)
* `msg` will be the list of sendable objects that was just sent
* `status` will be the return result of socket.send_multipart(msg) -
MessageTracker or None.
Non-copying sends return a MessageTracker object whose
`done` attribute will be True when the send is complete.
This allows users to track when an object is safe to write to
again.
The second argument will always be None if copy=True
on the send.
Use on_send_stream(callback) to register a callback that will be passed
this ZMQStream as the first argument, in addition to the other two.
on_send(None) disables recv event polling.
Parameters
----------
callback : callable
callback must take exactly two arguments, which will be
the message being sent (always a list),
and the return result of socket.send_multipart(msg) -
MessageTracker or None.
if callback is None, send callbacks are disabled.
N( R2 R R3 R ( R( R0 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR, � s $
c � s6 � d k r � j � n � j � � f d � � d S( s Same as on_send, but callback will get this stream as first argument
Callback will be passed three arguments::
callback(stream, msg, status)
Useful when a single callback should be used with multiple streams.
c � s � � | | � S( N( ( R8 t status( R0 R( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR � s N( R R- R, ( R( R0 ( ( R0 R( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt on_send_stream� s
c
C� s( | j | g d | d | d | d | �S( st Send a message, optionally also register a new callback for sends.
See zmq.socket.send for details.
t flagsR7 t trackR0 ( t send_multipart( R( R8 R< R7 R= R0 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt send� s c C� s� t d | d | d | � } | j j | | f � | p= | j } | d k r\ | j | � n | j d � � | j | j j � d S( s� Send a multipart message, optionally also register a new callback for sends.
See zmq.socket.send_multipart for details.
R< R7 R= c W� s d S( N( R ( t args( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR
s N( t dictR t putR R R, R6 R t WRITE( R( R8 R< R7 R= R0 t kwargs( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR> � s s utf-8c C� s@ t | t � s t d � � n | j | j | � d | d | �S( sb Send a unicode message with an encoding.
See zmq.socket.send_unicode for details.
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isinstanceR t TypeErrorR? t encode( R( t uR< t encodingR0 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt send_string
s c C� sG t d k r t d � � n( t j | � } | j | d | d | �Sd S( sa Send json-serialized version of an object.
See zmq.socket.send_json for details.
s5 jsonlib{1,2}, json or simplejson library is required.R< R0 N( R R t ImportErrort dumpsR? ( R( R R< R0 R8 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt send_json s i����c C� s( t j | | � } | j | | d | �S( st Send a Python object as a message using pickle to serialize.
See zmq.socket.send_json for details.
R0 ( t pickleRL R? ( R( R R< t protocolR0 R8 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt
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t | _ d S( s% callback for unsetting _flushed flag.N( R R ( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt
_finish_flush) s c � s� � j � � j } t � _ d } � � f d � } | � � � sG d S� j j � j � � � j j d � } x� | rX| s� | | k rX| d \ } } | t j @r� � j � | d 7} � j d k r� Pq� n | t j @r� j � r� j
� | d 7} � j d k rPqn | � � � rO� j j � j � � � j j d � } qr g } qr W| r�t � _ | s�� j j � j � q�n | r�t � _ n � j � | S( s� Flush pending messages.
This method safely handles all pending incoming and/or outgoing messages,
bypassing the inner loop, passing them to the registered callbacks.
A limit can be specified, to prevent blocking under high load.
flush will return the first time ANY of these conditions are met:
* No more events matching the flag are pending.
* the total number of events handled reaches the limit.
Note that if ``flag|POLLIN != 0``, recv events will be flushed even if no callback
is registered, unlike normal IOLoop operation. This allows flush to be
used to remove *and ignore* incoming messages.
Parameters
----------
flag : int, default=POLLIN|POLLOUT
0MQ poll flags.
If flag|POLLIN, recv events will be flushed.
If flag|POLLOUT, send events will be flushed.
Both flags can be set at once, which is the default.
limit : None or int, optional
The maximum number of messages to send or receive.
Both send and recv count against this limit.
Returns
-------
int : count of events handled (both send and recv)
i c � s" � t j @� j � o � t j @BS( sg Update the poll flag, to prevent registering POLLOUT events
if we don't have pending sends.( R t POLLINt sendingt POLLOUT( ( t flagR( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt update_flagS s i N( R2 R R R t registerR t pollR RR t _handle_recvR RT RS t _handle_sendt TrueR t add_callbackRQ t _rebuild_io_state( R( RU t limitt already_flushedt countRV t eventst st event( ( RU R( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt flush- sF
c C� s t j | � | _ d S( s2 Call the given callback when the stream is closed.N( R R3 R ( R( R0 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt set_close_callback s c C� s^ | j d k rZ | j j | j � | j j | � d | _ | j rZ | j | j � qZ n d S( s Close this stream.N( R R R t remove_handlert closeR t
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| j d k S( s; Returns True if we are currently receiving from the stream.N( R R ( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt receiving� s c C� s | j j � S( s7 Returns True if we are currently sending to the stream.( R t empty( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyRS � s c C� s
| j d k S( N( R R ( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyt closed� s c O� sR y$ t j � � | | | � Wd QXWn' t j d d t �| j � � n Xd S( sM Wrap running callbacks in try/except to allow us to
close our socket.Ns' Uncaught exception, closing connection.t exc_info( R t NullContextR t errorR[ Rg ( R( R0 R@ RD ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyRh � s
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� Wn' t j d d t �| j � � n Xd S( s� This method is the actual handler for IOLoop, that gets called whenever
an event on my socket is posted. It dispatches to _handle_recv, etc.s Got events for closed stream %sNs8 got POLLERR event on ZMQStream, which doesn't make senses' Uncaught exception, closing connection.Rm (
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| | � n d S( s Handle a recv event.NR7 s RECV Error: %s( R R t recv_multipartR t NOBLOCKR t ZMQErrort errnot EAGAINR Ro t strerrorR Rh ( R( R8 t eR0 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyRY � s "! c C� s� | j r
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} | j | | | � n d S( s Handle a send event.Ns# Shouldn't have handled a send events SEND Error: %s( R RS R Ro R t getR R> R Ru R Rh ( R( R8 RD R: Ry R0 ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyRZ � s
c C� s | j s t d � � n d S( Ns Stream is closed( R t IOError( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR2 � s c C� s� | j d k r d S| j j } | j � r> | | j j O} n | j � r] | | j j O} n | | j k r� | | _ | j | � n d S( s8 rebuild io state based on self.sending() and receiving()N(
R R R R Rj R5 RS RC R t _update_handler( R( t state( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR] � s c C� s4 | j | @s0 | j | B| _ | j | j � n d S( s Add io_state to poller.N( R R| ( R( R} ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR6 s
c C� s5 | j | @r1 | j | @| _ | j | j � n d S( s& Stop poller from watching an io_state.N( R R| ( R( R} ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR4 s
c C� s- | j d k r d S| j j | j | � d S( s! Update IOLoop handler with state.N( R R R t update_handler( R( R} ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR| s c C� s6 t j � �$ | j j | j | j | j � Wd QXd S( s# initialize the ioloop event handlerN( R Rn R t add_handlerR Rr R ( R( ( ( s= /usr/lib64/python2.7/site-packages/zmq/eventloop/zmqstream.pyR s
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