def migrate_db(sql_script):
"""Migrate database using sql_script."""
logger.info('Start migration %r', __file__)
with ENGINE.connect() as conn:
conn.autocommit = True
conn.execution_options(isolation_level='AUTOCOMMIT')
for stmt in convert_to_sqlalchemy_statement(sql_script):
logger.debug('Executing sql statement %r', stmt)
conn.execute(stmt)
logger.info('Migration finished!')
def prepare_queries(engine, w_per_q=5):
q = """ SELECT title
FROM article
ORDER BY RANDOM()
LIMIT 1000
"""
rs = engine.execute(text(q))
words = []
for title, in rs:
words += title.split(' ')
np.random.shuffle(words)
return [
' '.join(words[x:x + w_per_q]) for x in range(0, len(words), w_per_q)
]
def streaming_start_at(engine):
"""Return starting datetime of twitter tracking.
Parameters
----------
engine : sqlalchemy connection
The database connection, e.g., engine or session.
Returns
-------
datetime
The created_at datetime of the first tweet in the database.
"""
q = 'SELECT created_at FROM tweet ORDER BY id ASC LIMIT 1'
return engine.execute(q).scalar()
def before_request():
"""Before request, try to refresh content of searcher."""
now_dt = datetime.utcnow()
now_str = now_dt.strftime('%Y-%m-%d %H:%M:%S')
q0 = "SELECT value from meta_info WHERE name='searcher_refresh_date'"
q1 = "UPDATE meta_info SET value=:now WHERE name='searcher_refresh_date'"
try:
recent_refresh = engine.execute(q0).scalar()
except SQLAlchemyError:
recent_refresh = engine.execute(q0).scalar()
if recent_refresh:
recent_refresh = dateutil.parser.parse(recent_refresh)
if now_dt - recent_refresh > REFRESH_INTERVAL:
searcher.refresh()
engine.execute(sqlalchemy.text(q1), now=now_str)
else:
engine.execute(MetaInfo.__table__.insert().values(
name='searcher_refresh_date',
value=now_str,
value_type='datetime',
description="in api, recent refresh datetime of searcher"))
def run(cls, args):
"""Overriding method as the entry point of this command."""
session = Session()
if args['--volume'] is True:
configure_logging('report.volume',
console_level=args['--console-log-level'],
file_level='WARNING')
table_names = ['tweet', 'url', 'article']
table = args['--table']
if table not in table_names:
logger.critical('Available tables are: %s', table_names)
sys.exit(2)
interval_names = [
'minute', 'hour', 'day', 'week', 'month', 'quarter', 'year'
]
interval = args['--interval']
if interval not in interval_names:
logger.critical('Available intervals are: %s', interval_names)
sys.exit(2)
limit = args['--limit']
if int(limit) <= 0:
logger.critical('%r should larger than 0', limit)
sys.exit(2)
sql = """
SELECT count(id) as agg_num,
date_trunc(:interval, created_at) as interval
FROM %s
GROUP BY interval
ORDER BY interval DESC
LIMIT :limit""" % table
stmt = text(sql).bindparams(interval=interval, limit=limit)
strf = '%Y-%m-%d %H:%M:%S'
with ENGINE.connect() as conn:
result = conn.execute(stmt).fetchall()
print(('-' * 35))
print(('{0:^20s} | {1:12s}'.format('Timeline (%s)' % interval,
'Aggregation')))
print(('-' * 35))
for v, t in result:
print(('{0:^20s} | {1:8d}'.format(t.strftime(strf), v)))
print(('-' * 35))
elif args['--status']:
configure_logging('report.streaming-status',
console_level=args['--console-log-level'])
table_name = None
if args['--status'] == 'twitter':
table_name = 'tweet'
if table_name is None:
logger.critical('SNS %r has not been implemented!',
args['--status'])
sys.exit(2)
sql = 'SELECT created_at FROM {} ORDER BY id DESC LIMIT 1'.format(
'tweet')
with ENGINE.connect() as conn:
most_recent, = conn.execute(text(sql)).fetchone()
delta_minutes = 30
delta = timedelta(minutes=delta_minutes)
current_utc = datetime.utcnow()
if current_utc - most_recent > delta:
logger.critical(
'No %s streaming update in the past %s minutes!',
args['--status'], delta_minutes)
else:
logger.info('Most recent %s streaming update is %s',
args['--status'],
str(most_recent) + ' (UTC)')
elif args['--top-spreader'] is True:
configure_logging('report.top-spreaders',
console_level=args['--console-log-level'],
file_level='WARNING')
# try to create table
if (Top20SpreaderMonthly.__table__.exists(bind=ENGINE)) is False:
Top20SpreaderMonthly.__table__.create(bind=ENGINE)
if args['--force-today'] is True:
upper_day = datetime.utcnow().date()
elif args['--upper-day'] is None:
upper_day = datetime.utcnow().date() - timedelta(days=1)
else:
try:
upper_day = parse(args['--upper-day']).date()
except Exception:
raise ValueError('Invalid date: %s', args['--upper-day'])
if args['--generate'] is True:
logger.warning(
'Generating top spreaders for uppder_day=%r ...',
upper_day)
cls.generate_top_spreaders(session, upper_day)
elif args['--look-up'] is True:
cls.look_up_top_spreaders(session, upper_day,
args['--most-recent'])
elif args['--top-article'] is True:
configure_logging('report.top-article',
console_level=args['--console-log-level'],
file_level='WARNING')
# try to create table
if (Top20ArticleMonthly.__table__.exists(bind=ENGINE)) is False:
Top20ArticleMonthly.__table__.create(bind=ENGINE)
if args['--force-today'] is True:
upper_day = datetime.utcnow().date()
elif args['--upper-day'] is None:
upper_day = datetime.utcnow().date() - timedelta(days=1)
else:
try:
upper_day = parse(args['--upper-day']).date()
except Exception:
raise ValueError('Invalid date: %s', args['--upper-day'])
if args['--generate'] is True:
logger.warning('Generating top articles for uppder_day=%r ...',
upper_day)
cls.generate_top_articles(session, upper_day)
elif args['--look-up'] is True:
cls.look_up_top_articles(session, upper_day,
args['--most-recent'])
session.close()
