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https://github.com/SickGear/SickGear.git
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144 lines
3.7 KiB
Python
144 lines
3.7 KiB
Python
#!/usr/bin/env python
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#
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# Copyright 2007 Doug Hellmann.
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#
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#
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# All Rights Reserved
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#
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# Permission to use, copy, modify, and distribute this software and
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# its documentation for any purpose and without fee is hereby
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# granted, provided that the above copyright notice appear in all
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# copies and that both that copyright notice and this permission
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# notice appear in supporting documentation, and that the name of Doug
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# Hellmann not be used in advertising or publicity pertaining to
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# distribution of the software without specific, written prior
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# permission.
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#
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# DOUG HELLMANN DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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# INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
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# NO EVENT SHALL DOUG HELLMANN BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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# CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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# OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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#
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"""Example use of feedcache.Cache combined with threads.
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"""
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__module_id__ = "$Id$"
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#
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# Import system modules
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#
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import Queue
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import sys
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import shove
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import threading
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#
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# Import local modules
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#
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import cache
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#
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# Module
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#
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MAX_THREADS=5
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OUTPUT_DIR='/tmp/feedcache_example'
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def main(urls=[]):
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if not urls:
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print 'Specify the URLs to a few RSS or Atom feeds on the command line.'
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return
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# Decide how many threads to start
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num_threads = min(len(urls), MAX_THREADS)
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# Add the URLs to a queue
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url_queue = Queue.Queue()
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for url in urls:
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url_queue.put(url)
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# Add poison pills to the url queue to cause
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# the worker threads to break out of their loops
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for i in range(num_threads):
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url_queue.put(None)
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# Track the entries in the feeds being fetched
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entry_queue = Queue.Queue()
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print 'Saving feed data to', OUTPUT_DIR
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storage = shove.Shove('file://' + OUTPUT_DIR)
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try:
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# Start a few worker threads
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worker_threads = []
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for i in range(num_threads):
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t = threading.Thread(target=fetch_urls,
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args=(storage, url_queue, entry_queue,))
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worker_threads.append(t)
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t.setDaemon(True)
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t.start()
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# Start a thread to print the results
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printer_thread = threading.Thread(target=print_entries, args=(entry_queue,))
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printer_thread.setDaemon(True)
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printer_thread.start()
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# Wait for all of the URLs to be processed
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url_queue.join()
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# Wait for the worker threads to finish
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for t in worker_threads:
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t.join()
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# Poison the print thread and wait for it to exit
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entry_queue.put((None,None))
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entry_queue.join()
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printer_thread.join()
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finally:
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storage.close()
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return
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def fetch_urls(storage, input_queue, output_queue):
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"""Thread target for fetching feed data.
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"""
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c = cache.Cache(storage)
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while True:
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next_url = input_queue.get()
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if next_url is None: # None causes thread to exit
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input_queue.task_done()
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break
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feed_data = c.fetch(next_url)
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for entry in feed_data.entries:
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output_queue.put( (feed_data.feed, entry) )
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input_queue.task_done()
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return
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def print_entries(input_queue):
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"""Thread target for printing the contents of the feeds.
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"""
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while True:
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feed, entry = input_queue.get()
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if feed is None: # None causes thread to exist
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input_queue.task_done()
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break
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print '%s: %s' % (feed.title, entry.title)
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input_queue.task_done()
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return
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if __name__ == '__main__':
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main(sys.argv[1:])
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