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#!/usr/bin/python3
import asyncio
import os
import glob
import logging
import json
import asyncpg
import joblib.joblib
source_db = {
"host": os.environ.get("POSTGRESQL_SOURCE_HOST") or "vaindock_postgres_raw",
"port": os.environ.get("POSTGRESQL_SOURCE_PORT") or 5532,
"user": os.environ.get("POSTGRESQL_SOURCE_USER") or "vainraw",
"password": os.environ.get("POSTGRESQL_SOURCE_PASSWORD") or "vainraw",
"database": os.environ.get("POSTGRESQL_SOURCE_DB") or "vainsocial-raw"
}
dest_db = {
"host": os.environ.get("POSTGRESQL_DEST_HOST") or "vaindock_postgres_web",
"port": os.environ.get("POSTGRESQL_DEST_PORT") or 5432,
"user": os.environ.get("POSTGRESQL_DEST_USER") or "vainweb",
"password": os.environ.get("POSTGRESQL_DEST_PASSWORD") or "vainweb",
"database": os.environ.get("POSTGRESQL_DEST_DB") or "vainsocial-web"
}
class Worker(object):
def __init__(self):
self._queue = None
self._srcpool = None
self._destpool = None
self._queries = {}
async def connect(self, sourcea, desta):
"""Connect to database."""
logging.info("connecting to database")
self._queue = joblib.joblib.JobQueue()
await self._queue.connect(**sourcea)
await self._queue.setup()
self._srcpool = await asyncpg.create_pool(**sourcea)
self._destpool = await asyncpg.create_pool(**desta)
async def setup(self):
"""Initialize the database."""
scriptroot = os.path.realpath(
os.path.join(os.getcwd(), os.path.dirname(__file__)))
for path in glob.glob(scriptroot + "/queries/*.sql"):
# utf-8-sig is used by pgadmin, doesn't hurt to specify
# file names: raw target table
table = os.path.splitext(os.path.basename(path))[0]
with open(path, "r", encoding="utf-8-sig") as file:
self._queries[table] = file.read()
logging.info("loaded query '%s'", table)
logging.info("creating index")
async with self._destpool.acquire() as con:
async with con.transaction():
await con.execute("CREATE UNIQUE INDEX ON match(\"apiId\")")
await con.execute("CREATE UNIQUE INDEX ON player(\"apiId\")")
async def _execute_job(self, jobid, payload):
"""Finish a job."""
object_id = payload["id"]
explicit_player = payload["playername"]
async with self._srcpool.acquire() as srccon:
async with self._destpool.acquire() as destcon:
logging.debug("%s: processing '%s'", jobid, object_id)
async with srccon.transaction():
async with destcon.transaction():
# 1 object in raw : n objects in web
for table, query in self._queries.items():
logging.debug("%s: running '%s' query",
jobid, table)
# fetch from raw, converted to format for web table
if table == "player":
# upsert under special conditions
data = await srccon.fetchrow(
query, object_id, explicit_player)
if data["name"] == explicit_player:
await self._playerinto(destcon, data,
table,
True)
else:
data = await srccon.fetchrow(
query, object_id)
# insert processed result into web table
await self._into(destcon, data, table)
data = await srccon.fetchrow(
"DELETE FROM match WHERE id=$1", object_id)
async def _playerinto(self, conn, data, table, do_upsert_date):
"""Upserts a player named tuple into a table."""
if do_upsert_date:
# explicit update for this player -> store
lmcd = data["lastMatchCreatedDate"]
data = dict(data)
del data["lastMatchCreatedDate"]
items = list(data.items())
keys, values = [x[0] for x in items], [x[1] for x in items]
placeholders = ["${}".format(i) for i, _ in enumerate(values, 1)]
# upsert all values except lmcd if they are more recent
query = """
INSERT INTO player ("{0}", "lastMatchCreatedDate")
VALUES ({1}, 'epoch'::timestamp)
ON CONFLICT("apiId") DO UPDATE SET ("{0}") = ({1})
WHERE player.played < EXCLUDED.played
""".format(
"\", \"".join(keys), ", ".join(placeholders))
await conn.execute(query, *data.values())
if do_upsert_date:
# upsert lmcd because it was an explicit request
await conn.execute("""
UPDATE player SET "lastMatchCreatedDate"=$1
WHERE player."lastMatchCreatedDate" < $1
""", lmcd)
async def _into(self, conn, data, table):
"""Insert a named tuple into a table."""
items = list(data.items())
keys, values = [x[0] for x in items], [x[1] for x in items]
placeholders = ["${}".format(i) for i, _ in enumerate(values, 1)]
query = "INSERT INTO {} (\"{}\") VALUES ({}) ON CONFLICT DO NOTHING".format(
table, "\", \"".join(keys), ", ".join(placeholders))
await conn.execute(query, (*data))
async def _work(self):
"""Fetch a job and run it."""
jobid, payload, _ = await self._queue.acquire(jobtype="process")
if jobid is None:
raise LookupError("no jobs available")
logging.debug("%s: starting job", jobid)
await self._execute_job(jobid, payload)
await self._queue.finish(jobid)
logging.debug("%s: finished job", jobid)
async def run(self):
"""Start jobs forever."""
while True:
try:
await self._work()
except LookupError:
logging.info("nothing to do, idling")
await asyncio.sleep(10)
async def startup():
for _ in range(1):
worker = Worker()
await worker.connect(
source_db, dest_db
)
await worker.setup()
await worker.run()
logging.basicConfig(level=logging.DEBUG)
loop = asyncio.get_event_loop()
loop.run_until_complete(startup())
loop.run_forever()
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