import job_processing_functions as jpf
## const globals
BASE_DIR = "/home/michael/science/wikipedia/code/"
INI_FILE = BASE_DIR + "config_data.ini"
## parse the ini file
ini_config = ConfigParser.ConfigParser()
ini_config.readfp(open(INI_FILE))
## init constants
N = int(ini_config.get('constants', 'N'))
K_REV = int(ini_config.get('constants', 'K_REVISIONS'))
K_TIME = int(ini_config.get('constants', 'K_TIME'))
## init the DB
connection = MySQLdb.connect(host=ini_config.get('db', 'host'),
user=ini_config.get('db', 'user'), passwd=ini_config.get('db', 'passwd') \
, db=ini_config.get('db', 'db') )
curs = connection.cursor()
if len(sys.argv) > 2:
article_id = sys.argv[1]
revision_id = sys.argv[2]
job = (article_id, revision_id)
jsn = jpf.get_treejson(curs, article_id)
jpf.process_a_job(curs, job, jsn, N, K_REV, K_TIME)
curs.close()
connection.close()
def run(self):
# parse the ini file
ini_config = ConfigParser.ConfigParser()
ini_config.readfp(open(self.inifile))
# init constants
N = int(ini_config.get("constants", "N"))
K_REV = int(ini_config.get("constants", "K_REVISIONS"))
K_TIME = int(ini_config.get("constants", "K_TIME"))
SLEEP_TIME = int(ini_config.get("constants", "SLEEP_TIME"))
## init the DB
connection = MySQLdb.connect(
host=ini_config.get("db", "host"),
user=ini_config.get("db", "user"),
passwd=ini_config.get("db", "passwd"),
db=ini_config.get("db", "db"),
)
connection.autocommit(True)
curs = connection.cursor()
# logic desription
# get_all_jobs returns dictionary of jobs with key by
# article id (page id), value is a list of revision id's;
# the list is sorted in ascending order;
# then we iterate over all articles and add articles in ascending order;
# before adding a revision we check whether
# previous revision was added to the tree or not;
# if previous revision was not added then we add all revisions id's of
# the article which have not been proceeded;
# if previous revision was added then we add
# current revision to the tree and delete job from the queue
while True:
jobs = jpf.get_all_jobs(curs)
# if there are no jobs then we sleep for SLEEP_TIME seconds
if jobs == None:
time.sleep(SLEEP_TIME)
continue
# now processing all jobs
for article_id in jobs:
list_of_rev_id = jobs[article_id]
for idx in xrange(len(list_of_rev_id)):
revision_id = list_of_rev_id[idx]
job = (article_id, revision_id)
jsn = jpf.get_treejson(curs, article_id)
# case when we don't have stored tree yet
if jsn == None:
# if revision is the first revision
if jpf.get_previous_revision_id(curs, revision_id) == 0:
jpf.process_a_job(curs, job, jsn, N, K_REV, K_TIME)
continue
# todo(michael): think about case when we want to add
# revision which should have been added earlier then
# the latest added revision
if jpf.is_tree_uptodate(curs, jsn, article_id, revision_id):
jpf.process_a_job(curs, job, jsn, N, K_REV, K_TIME)
else:
# fetch all unproceeded revisions
# and add them to the queue
new_ids = jpf.fetch_new_revisions(curs, jsn, article_id)
missed_ids = [x for x in new_ids if not x in list_of_rev_id[idx:]]
for missed_revision_id in missed_ids:
jpf.put_job_in_queue(curs, article_id, missed_revision_id)
# inserted jobs will be proceeded when
# job_processor will read the job queue next time
# now we need to proceed next article
break
curs.close()
connection.close()