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raw2db.py
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raw2db.py
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import logging
import progressbar
progressbar.streams.wrap_stderr()
logging.basicConfig(
level=logging.DEBUG,
filename='/tmp/geolife.log',
filemode='w'
)
logger = logging.getLogger("geolife")
stdout = logging.StreamHandler()
stdout.setLevel(logging.INFO)
logger.addHandler(stdout)
import argparse
import os
import geolife
from sqlalchemy.orm import sessionmaker
from sqlalchemy import Index
from sqlalchemy.sql import func
from raw import record
from raw import user
import config
from datetime import date
from datetime import datetime
from utils import get_users
# Parse the command-line arguments.
def get_arguments():
parser = argparse.ArgumentParser(
description='Populate local database with each raw trajectory.'
)
parser.add_argument(
'-i', '--input_directory',
dest="input_directory",
help='Directory containing PLT files (default: current working directory)',
type=geolife.find_geolife_root,
required=True,
)
args = parser.parse_args()
return args
if __name__ == "__main__":
args = get_arguments()
directory = args.input_directory
logger.info("Loading database with raw Geolife records")
logger.info("Source: {0}".format(directory))
engine = config.getEngine()
Session = sessionmaker()
Session.configure(bind=engine)
session = Session()
logger.info("-"*50)
logger.info("Database will be created and populated from files"
" in {0}".format(directory))
record.initialize_table(engine)
logger.info("Table initialized")
with progressbar.ProgressBar(max_value=geolife.get_num_files(directory)) as\
progress:
current_file_index = 1
for u in user.from_directory(directory):
logger.info("Beginning yielding of records from user {0.id}".format(u))
for f in u.files:
session.add_all(f)
session.commit()
progress.update(current_file_index)
current_file_index += 1
logger.info("File {0}".format(os.path.basename(f.url)))
u.num_records += f.num_records
session.add(u.to_DB())
session.commit()
# Create an index on the time values
logger.info("Creating index on raw record time columns")
Index('raw_time', record.RawRecord.__table__.c.time).create(engine)
Index('raw_latitude', record.RawRecord.__table__.c.latitude).create(engine)
Index('raw_longitude', record.RawRecord.__table__.c.longitude).create(engine)
Index('raw_newnames', record.RawRecord.__table__.c.date_user_id).create(engine)
engine.execute("""
CREATE VIEW day_records_view
AS SELECT
latitude as lat,
longitude as long,
time as timestamp,
"user" as old_user_id,
date_user_id as new_user_id
from raw_records
WHERE latitude > {0}
AND latitude < {1}
AND longitude > {2}
AND longitude < {3};
""".format(
config.BOUNDS['south'],
config.BOUNDS['north'],
config.BOUNDS['west'],
config.BOUNDS['east'],
))
from schema import RecordsOnOneDay
logger.info("Preloading RecentUserRecord object")
users = get_users(session)
records = session.query(RecordsOnOneDay).order_by(RecordsOnOneDay.c.timestamp)
date_dummy = date.today()
dayusers = []
with progressbar.ProgressBar(max_value=len(users)) as progress:
for i, u in enumerate(users):
logger.info("Calculating the user's centroid of movement")
centroid_of_movement = session.query(
func.avg(RecordsOnOneDay.c.lat).label('lat'),
func.avg(RecordsOnOneDay.c.long).label('long'),
).filter(RecordsOnOneDay.c.new_user_id==u).first()
count = records.filter(RecordsOnOneDay.c.new_user_id == u).count()
r = records.filter(RecordsOnOneDay.c.new_user_id == u).first()
last = session.query(RecordsOnOneDay).filter(
RecordsOnOneDay.c.new_user_id == u
).order_by(
RecordsOnOneDay.c.timestamp.desc()
).first()
# If this node has no activity within the bounds, skip them.
if r is None:
continue
latest_timestamp = datetime.combine(date_dummy, last.timestamp)
earliest_timestamp = datetime.combine(date_dummy, r.timestamp)
duration_seconds = latest_timestamp - earliest_timestamp
#dayusers.append(
session.add(
record.DayUser(
id=u, count=count,
earliest_record_time=r.timestamp,
latest_record_time=last.timestamp,
duration=(duration_seconds).total_seconds(),
centroid_lat=centroid_of_movement.lat,
centroid_lon=centroid_of_movement.long,
))
logger.info("First record for user {0}: {1}".format(u, r))
progress.update(i)
#session.add_all(dayusers)
session.commit()
session.close()