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#!/usr/bin/python
import asyncio
import os
import database
import crawler
db = database.Database()
# TODO use logging module instead of print
async def crawl_region(region):
"""Gets some matches from a region and inserts them
until the DB is up to date."""
api = crawler.Crawler()
# fetch until exhausted
while True:
try:
last_match_update = (await db.select(
"""
SELECT data->'attributes'->>'createdAt' AS created
FROM match
WHERE data->'attributes'->>'shardId'='""" + region + """'
ORDER BY data->'attributes'->>'createdAt' DESC LIMIT 1
""")
)[0]["created"]
except:
last_match_update = "2017-02-05T01:01:01Z"
print(region + " fetching matches after " + last_match_update)
# wait for http requests
matches = await api.matches_since(last_match_update,
region=region,
params={"page[limit]": 50})
if len(matches) > 0:
print(region + " got new data items: " + str(len(matches)))
else:
print(region + " got no new matches.")
return
# insert asynchronously in the background
await db.upsert(matches, True)
async def crawl_forever():
"""Gets the latest matches from all regions every 5 minutes."""
# repeat forever
while True:
print("getting recent matches")
# TODO: insert API version (force update if changed)
# TODO: create database indices
# get or put when the last crawl was executed
# crawl and upsert
tasks = []
for region in ["na", "eu"]:
# fire workers
tasks.append(asyncio.ensure_future(crawl_region(region)))
await asyncio.gather(*tasks) # wait until all have completed
await asyncio.sleep(300)
loop = asyncio.get_event_loop()
loop.run_until_complete(db.connect(
host=os.environ["POSTGRESQL_HOST"],
port=os.environ["POSTGRESQL_PORT"],
user=os.environ["POSTGRESQL_USER"],
password=os.environ["POSTGRESQL_PASSWORD"],
database=os.environ["POSTGRESQL_DB"]
))
loop.run_until_complete(
crawl_forever()
)
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