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Note that event handlers are executed synchronously when the C{fire} method is called, so unit-tests can generally exercise events without needing to run the real Twisted reactor (except of course if the event handlers themselves contain asynchronous calls that need the Twisted reactor running). c s t t| ��� i | _d S r )�superr r �_event_handlers�r �� __class__r r r - s z"EventHandlingReactorMixin.__init__r c C s: ||f}| j �|g �}|�|� |jdd� d� t||�S )a� Register an event handler. The handler will be invoked every time an event of the given type is fired (there's no need to re-register the handler after the event is fired). @param event_type: The name of the event type to handle. @param handler: The function handling the given event type. @param priority: The priority of the given handler function. @return: The L{EventID} of the registered handler. c S s | d S )N� r )r r r r �<lambda>B s z3EventHandlingReactorMixin.call_on.<locals>.<lambda>)�key)r � setdefault�append�sortr )r r �handler�priorityr �handlersr r r �call_on1 s z!EventHandlingReactorMixin.call_onc O s� t �d|� g }t| j�|d��}|D ]D\}}zt �dt|�||� |�||i |��� W q tyD t �dt|�|||� | � � � t yW t �dt|�|||� Y qw t �d|� |S )ac Fire an event of a given type. Call all handlers registered for the given C{event_type}, in order of priority. @param event_type: The name of the event type to fire. @param args: Positional arguments to pass to the registered handlers. @param kwargs: Keyword arguments to pass to the registered handlers. zStarted firing %s.r z#Calling %s for %s with priority %d.zTKeyboard interrupt while running event handler %s for event type %r with args %r %r.zAError running event handler %s for event type %r with args %r %r.zFinished firing %s.) �logging�debug�listr �getr r" �KeyboardInterrupt� exception�stop� Exception)r r �args�kwargs�resultsr& r$ r% r r r �fireF s0 � � �� z EventHandlingReactorMixin.firec C s0 t |�tu r| j|j �|j� dS td| ��)zfUnregister an event handler. @param id: the L{EventID} of the handler to unregister. z&EventID instance expected, received %rN)�typer r r �remover r �r �idr r r � cancel_callj s z%EventHandlingReactorMixin.cancel_call)r ) r r r r r r' r3 r8 � __classcell__r r r r r # s $r c @ s e Zd Zdd� ZdS )� ReactorIDc C s || _ d S r )�_timeout)r �timeoutr r r r w s zReactorID.__init__N)r r r r r r r r r: u s r: c s� e Zd ZdZ� fdd�Zdd� Zdd� Zdd � Zd d � Zd d � Z dd� Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Z� ZS ) �EventHandlingReactora Wrap and add functionalities to the Twisted reactor. This is essentially a facade around the twisted.internet.reactor and will delegate to it for mostly everything except event handling features which are implemented using EventHandlingReactorMixin. c sF ddl m} ddlm} || _|| _| �� |j| _tt | �� � d S )Nr )�reactor)� LoopingCall) �twisted.internetr> �twisted.internet.taskr? � _LoopingCall�_reactor�_cleanup�callFromThreadr r= r )r r> r? r r r r � s z EventHandlingReactor.__init__c C s t � � S )z5Get current time. @see L{time.time} )�timer r r r rF � s zEventHandlingReactor.timec O s | j j|i |��S )z�Call a function later. Simply call C{callLater(*args, **kwargs)} and return its result. @see: L{twisted.internet.interfaces.IReactorTime.callLater}. )rC � callLater)r r0 r1 r r r � call_later� s z EventHandlingReactor.call_laterc O s* | j |g|�R i |��}|j|dd� |S )z�Call a function repeatedly. Create a new L{twisted.internet.task.LoopingCall} object and start it. @return: the created C{LoopingCall} object. F)�now)rB �start)r �seconds�fr0 r1 �lcr r r � call_every� s z EventHandlingReactor.call_everyc C sB t |t�r t�| |�S t || j�r|�� S |�� r |�� dS dS )a Cancel a scheduled function or event handler. @param id: The function call or handler to remove. It can be an L{EventID}, a L{LoopingCall} or a C{IDelayedCall}, as returned by L{call_on}, L{call_every} and L{call_later} respectively. N)� isinstancer r r8 rB r. �active�cancelr6 r r r r8 � s �z EventHandlingReactor.cancel_callc C s | j �|� dS )zASchedule a function to be called when the reactor starts running.N)rC �callWhenRunning)r rL r r r �call_when_running� s z&EventHandlingReactor.call_when_runningc O s | j j|g|�R i |�� dS )a1 Cause a function to be executed by the reactor thread. @param f: The callable object to execute. @param args: The arguments to call it with. @param kwargs: The keyword arguments to call it with. @see: L{twisted.internet.interfaces.IReactorThreads.callFromThread} N)rC rE )r rL r0 r1 r r r � call_in_main� s z!EventHandlingReactor.call_in_mainc sF � fdd�}�fdd�}t |g|�R i |��}|�|� |�|� dS )a Execute a callable object in a new separate thread. @param callback: A function to call in case C{f} was successful, it will be passed the return value of C{f}. @param errback: A function to call in case C{f} raised an exception, it will be pass a C{(type, value, traceback)} tuple giving information about the raised exception (see L{sys.exc_info}). @note: Both C{callback} and C{errback} will be executed in the the parent thread. c s � r� | �S d S r r )�result)�callbackr r � on_success� s �z7EventHandlingReactor.call_in_thread.<locals>.on_successc s6 | j | j| jf}� r� |� d S tj|d |d� d S )Nr )�exc_info)r4 �value�tbr( �error)�failurerX )�errbackr r � on_failure� s z7EventHandlingReactor.call_in_thread.<locals>.on_failureN)r � addCallback� addErrback) r rV r] rL r0 r1 rW r^ �deferredr )rV r] r �call_in_thread� s z#EventHandlingReactor.call_in_threadc C s | j j||dd�S )z!Start listening on a Unix socket.T)�wantPID)rC � listenUNIX�r �socket�factoryr r r � listen_unix� s z EventHandlingReactor.listen_unixc C s | j �||�S )zConnect to a Unix socket.)rC � connectUNIXre r r r � connect_unix� s z!EventHandlingReactor.connect_unixc C s" | � d� | j�� | � d� dS )z2Start the reactor, a C{"run"} event will be fired.�runr. N)r3 rC rk r r r r rk � s zEventHandlingReactor.runc C s | j �� | �� dS )z2Stop the reactor, a C{"stop"} event will be fired.N)rC r. rD r r r r r. � s zEventHandlingReactor.stopc C s$ | j �� D ] }|�� r|�� qd S r )rC �getDelayedCallsrP rQ )r �callr r r rD � s ��z EventHandlingReactor._cleanup)r r r r r rF rH rN r8 rS rT rb rh rj rk r. rD r9 r r r r r= { s r= )r � __future__r r( rF �twisted.internet.threadsr �landscape.lib.formatr r/ r r �objectr r r: r= r r r r �<module> s R
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