def _get_link_transactional(key):
link = db.get(key)
if link is None:
raise db.TransactionFailedError()
rawlink = link.link
db.delete(link)
return rawlink
def check_job_and_submit(app_context, incremental=True):
"""Determines whether an indexing job is running and submits if not."""
indexing_job = IndexCourse(app_context, incremental=False)
job_entity = IndexCourse(app_context).load()
bad_status_codes = [jobs.STATUS_CODE_STARTED, jobs.STATUS_CODE_QUEUED]
if job_entity and job_entity.status_code in bad_status_codes:
raise db.TransactionFailedError('Index job is currently running.')
indexing_job.non_transactional_submit()
def check_jobs_and_submit(job, app_context):
"""Determines whether an indexing job is running and submits if not."""
indexing_job = IndexCourse(app_context).load()
clearing_job = ClearIndex(app_context).load()
bad_status_codes = [jobs.STATUS_CODE_STARTED, jobs.STATUS_CODE_QUEUED]
if ((indexing_job and indexing_job.status_code in bad_status_codes) or
(clearing_job and clearing_job.status_code in bad_status_codes)):
raise db.TransactionFailedError('Index job is currently running.')
else:
job.non_transactional_submit()
def increment(cls, name, num_shards, downward=False):
index = random.randint(1, num_shards)
shard_key_name = 'Shard' + name + str(index)
def get_or_create_shard():
shard = CounterShard.get_by_key_name(shard_key_name)
if shard is None:
shard = CounterShard(key_name=shard_key_name,
name=name)
if downward:
shard.count -= 1
else:
shard.count += 1
key = shard.put()
try:
db.run_in_transaction(get_or_create_shard)
return True
except db.TransactionFailedError():
logging.error("CounterShard (%s, %d) - can't increment",
name, num_shards)
return False