mylar/lib/apscheduler/jobstores/shelve_store.py

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"""
Stores jobs in a file governed by the :mod:`shelve` module.
"""
import shelve
import pickle
import random
import logging
from apscheduler.jobstores.base import JobStore
from apscheduler.job import Job
from apscheduler.util import itervalues
logger = logging.getLogger(__name__)
class ShelveJobStore(JobStore):
MAX_ID = 1000000
def __init__(self, path, pickle_protocol=pickle.HIGHEST_PROTOCOL):
self.jobs = []
self.path = path
self.pickle_protocol = pickle_protocol
self.store = shelve.open(path, 'c', self.pickle_protocol)
def _generate_id(self):
id = None
while not id:
id = str(random.randint(1, self.MAX_ID))
if not id in self.store:
return id
def add_job(self, job):
job.id = self._generate_id()
self.jobs.append(job)
self.store[job.id] = job.__getstate__()
def update_job(self, job):
job_dict = self.store[job.id]
job_dict['next_run_time'] = job.next_run_time
job_dict['runs'] = job.runs
self.store[job.id] = job_dict
def remove_job(self, job):
del self.store[job.id]
self.jobs.remove(job)
def load_jobs(self):
jobs = []
for job_dict in itervalues(self.store):
try:
job = Job.__new__(Job)
job.__setstate__(job_dict)
jobs.append(job)
except Exception:
job_name = job_dict.get('name', '(unknown)')
logger.exception('Unable to restore job "%s"', job_name)
self.jobs = jobs
def close(self):
self.store.close()
def __repr__(self):
return '<%s (path=%s)>' % (self.__class__.__name__, self.path)