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#!/usr/bin/env python
"""
An example of making multi-threaded cached requests, adapted from the python docs for
{py:class}`~concurrent.futures.ThreadPoolExecutor`.
"""
from concurrent.futures import ThreadPoolExecutor, as_completed
from time import perf_counter as time
from requests_cache import CachedSession
URLS = [
'https://en.wikipedia.org/wiki/Python_(programming_language)',
'https://en.wikipedia.org/wiki/Requests_(software)',
'https://en.wikipedia.org/wiki/Cache_(computing)',
'https://en.wikipedia.org/wiki/SQLite',
'https://en.wikipedia.org/wiki/Redis',
'https://en.wikipedia.org/wiki/MongoDB',
]
def send_requests():
session = CachedSession('example_cache')
start = time()
with ThreadPoolExecutor(max_workers=5) as executor:
future_to_url = {executor.submit(session.get, url): url for url in URLS}
for future in as_completed(future_to_url):
url = future_to_url[future]
response = future.result()
from_cache = 'hit' if response.from_cache else 'miss'
print(f'{url} is {len(response.content)} bytes (cache {from_cache})')
print(f'Elapsed: {time() - start:.3f} seconds')
if __name__ == '__main__':
send_requests()
send_requests()
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