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"""External worker script"""
import os
import sys
import traceback
from typing import Callable
from zipfile import ZipFile, is_zipfile
import jsonpickle
from redis import Redis
from redis.exceptions import ConnectionError # pylint: disable=[redefined-builtin]
from quality_control.utils import make_progress_calculator
from quality_control.parsing import FileType, strain_names, collect_errors
from .qc import cli_argument_parser
def make_progress_indicator(
redis_connection: Redis, job_id: str,
progress_calc_fn: Callable) -> Callable:
"""Make function that will compute the progress and update redis"""
def __indicator__(linenumber, linetext):
progress = progress_calc_fn(linenumber, linetext)
redis_connection.hset(name=job_id, mapping=progress._asdict())
return progress
return __indicator__
def cli_args_valid(args):
"Check that the command-line arguments are provided and correct"
if not os.path.exists(args.filepath):
print(f"The file '{args.filepath}' does not exist.", file=sys.stderr)
return None
if not os.path.exists(args.strainsfile):
print(f"The file '{args.strainsfile}' does not exist.", file=sys.stderr)
return None
try:
conn = Redis.from_url(args.redisurl) # pylint: disable=[unused-variable]
except ConnectionError as conn_err: # pylint: disable=[unused-variable]
print(traceback.format_exc(), file=sys.stderr)
return None
return args
def process_cli_arguments():
"""Setup command-line parser"""
parser = cli_argument_parser()
parser.prog = "worker"
parser.add_argument(
"redisurl", default="redis:///", help="URL to the redis server")
parser.add_argument("job_id", help="The id of the job being processed")
return cli_args_valid(parser.parse_args())
def stream_error(redis_conn, job_id, error):
"""Update redis with the most current error(s) found"""
errors = jsonpickle.decode(
redis_conn.hget(job_id, key="errors") or jsonpickle.encode(tuple()))
redis_conn.hset(
job_id, key="errors", value=jsonpickle.encode(errors + (error,)))
def make_user_aborted(redis_conn, job_id):
"""Mkae function that checks whether the user aborted the process"""
def __aborted__():
user_aborted = bool(int(
redis_conn.hget(name=job_id, key="user_aborted") or "0"))
if user_aborted:
redis_conn.hset(name=job_id, key="status", value="aborted")
return user_aborted
return __aborted__
def get_zipfile_size(filepath):
"Compute size of given zipfile"
with ZipFile(filepath, "r") as zfile:
return zfile.infolist()[0].file_size
def main():
"entry point to the script"
args = process_cli_arguments()
if args is None:
print("Quiting due to errors!", file=sys.stderr)
return 1
with Redis.from_url(args.redisurl) as redis_conn:
progress_calculator = make_progress_calculator(
get_zipfile_size(args.filepath) if is_zipfile(args.filepath)
else os.stat(args.filepath).st_size)
progress_indicator = make_progress_indicator(
redis_conn, args.job_id, progress_calculator)
count = args.count
filepath = args.filepath
filetype = (
FileType.AVERAGE if args.filetype == "average"
else FileType.STANDARD_ERROR)
strains = strain_names(args.strainsfile)
redis_conn.hset(
name=args.job_id, key="status", value="Processing")
redis_conn.hset(
name=args.job_id, key="message", value="Collecting errors")
error_count = 0
for error in collect_errors(
filepath, filetype, strains, progress_indicator,
make_user_aborted(redis_conn, args.job_id)):
stream_error(redis_conn, args.job_id, error)
if count > 0:
error_count = error_count + 1
if error_count >= count:
break
redis_conn.hset(name=args.job_id, key="status", value="success")
return 0
if __name__ == "__main__":
main()
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