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This sets this selectable to be a consumer for a producer. When this selectable runs out of data on a write() call, it will ask the producer to resumeProducing(). A producer should implement the IProducer interface. FileDescriptor provides some infrastructure for producer methods. NzHCannot register producer %s, because producer %s was never unregistered.)rQ � RuntimeErrorr rK rS rN )r rQ � streamingr r r �registerProducer� s �� �z#_PollableWritePipe.registerProducerc C s d| _ dS )z;Stop consuming data from a producer, without disconnecting.N)rQ r r r r �unregisterProducer� s z%_PollableWritePipe.unregisterProducerc C s: | � � zt�| j� W n tjy Y nw | �� d S r )r r: rG rU rH r; r3 r r r r �writeConnectionLost� s � z&_PollableWritePipe.writeConnectionLostc C s& t tt|�v r td��| j�|� dS )z� Append a C{list} or C{tuple} of bytes to the output buffer. @param seq: C{list} or C{tuple} of C{str} instances to be appended to the output buffer. @raise TypeError: If C{seq} contains C{unicode}. �%Unicode not allowed in output buffer.N)�str�map�type� TypeErrorrT �extend)r �seqr r r � writeSequence� s z _PollableWritePipe.writeSequencec C sL t |t�r td��| jrdS | j�|� ttt| j��t kr$| � � dS dS )z� Append some bytes to the output buffer. @param data: C{str} to be appended to the output buffer. @type data: C{str}. @raise TypeError: If C{data} is C{unicode} instead of C{str}. r_ N) � isinstancer` rc rP rT r �sumra r> �FULL_BUFFER_SIZErX )r rE r r r �write� s �z_PollableWritePipe.writec C s� d}| j s)| jr| �� dS z t�| jdd � W n tjy( | �� | Y S w | j rk| j �d�}d}z t�| j|d �\}}W n t jyO | �� Y |S w ||7 }t |�|krh| j � d||d � � |S | j s,| � � }|sx| jrx| �� |S )Nr r5 ) rT rP r^ r8 � WriteFilerU rH r; �popr: r> �insertrY )r �numBytesWrittenrE �errCode� nBytesWritten�resumedr r r r+ s> � � � z _PollableWritePipe.checkWorkN) r r r r rI rX rY r\ r] r^ rf rj r+ r r r r rO � s rO )�__doc__�zope.interfacer �twisted.internet.interfacesr r r, r r r rH r: r8 r6 r0 ri rO r r r r �<module> s E3
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