May 26, 2018

Perl extension for streaming from one filehandle to another

POExRoleStreaming provides a common idiom for streaming data from one filehandle to another. It accomplishes this by making good use of sysread and POEWheelReadWrite. This Role errs on the side of doing as many blocking reads of the “input_handle” as possible up front until the high water mark is hit on the Wheel. If this default isn’t suitable for the consumer, simply override “get_data_from_input_handle”. After Streamer has exhausted the source, and flushed the last of the output, it will clean up after itself by closing the wheel, the handles, and sending all of them out of scope. If an exception happens, it will clean up after itself, and let the DIE signal propagate.

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