Scheduler fix

couchpotato/core/_base/scheduler/main.py

@@ -15,8 +15,7 @@ class Scheduler(Plugin):
 
     def __init__(self):
 
-        sl = logging.getLogger('apscheduler.scheduler')
-        sl.disabled = True
+        logging.getLogger('apscheduler').setLevel(logging.WARNING)
 
         addEvent('schedule.cron', self.cron)
         addEvent('schedule.interval', self.interval)
@@ -55,7 +54,7 @@ class Scheduler(Plugin):
             try:
                 self.remove(identifier)
                 interval = self.intervals[identifier]
-                job = self.sched.add_interval_job(interval['handle'], hours = interval['hours'], minutes = interval['minutes'], seconds = interval['seconds'], repeat = interval['repeat'])
+                job = self.sched.add_interval_job(interval['handle'], hours = interval['hours'], minutes = interval['minutes'], seconds = interval['seconds'])
                 interval['job'] = job
             except ValueError, e:
                 log.error("Failed adding interval cronjob: %s" % e)
@@ -88,13 +87,12 @@ class Scheduler(Plugin):
             'minute': minute,
         }
 
-    def interval(self, identifier = '', handle = None, hours = 0, minutes = 0, seconds = 0, repeat = 0):
-        log.info('Scheduling %s, interval: hours = %s, minutes = %s, seconds = %s, repeat = %s' % (identifier, hours, minutes, seconds, repeat))
+    def interval(self, identifier = '', handle = None, hours = 0, minutes = 0, seconds = 0):
+        log.info('Scheduling %s, interval: hours = %s, minutes = %s, seconds = %s' % (identifier, hours, minutes, seconds))
 
         self.remove(identifier)
         self.intervals[identifier] = {
             'handle': handle,
-            'repeat': repeat,
             'hours': hours,
             'minutes': minutes,
             'seconds': seconds,

libs/apscheduler/__init__.py

@@ -0,0 +1,3 @@
+version_info = (2, 0, 2)
+version = '.'.join(str(n) for n in version_info[:3])
+release = version + ''.join(str(n) for n in version_info[3:])

libs/apscheduler/events.py

@@ -0,0 +1,64 @@
+__all__ = ('EVENT_SCHEDULER_START', 'EVENT_SCHEDULER_SHUTDOWN',
+           'EVENT_JOBSTORE_ADDED', 'EVENT_JOBSTORE_REMOVED',
+           'EVENT_JOBSTORE_JOB_ADDED', 'EVENT_JOBSTORE_JOB_REMOVED',
+           'EVENT_JOB_EXECUTED', 'EVENT_JOB_ERROR', 'EVENT_JOB_MISSED',
+           'EVENT_ALL', 'SchedulerEvent', 'JobStoreEvent', 'JobEvent')
+
+
+EVENT_SCHEDULER_START = 1        # The scheduler was started
+EVENT_SCHEDULER_SHUTDOWN = 2     # The scheduler was shut down
+EVENT_JOBSTORE_ADDED = 4         # A job store was added to the scheduler
+EVENT_JOBSTORE_REMOVED = 8       # A job store was removed from the scheduler
+EVENT_JOBSTORE_JOB_ADDED = 16    # A job was added to a job store
+EVENT_JOBSTORE_JOB_REMOVED = 32  # A job was removed from a job store
+EVENT_JOB_EXECUTED = 64          # A job was executed successfully
+EVENT_JOB_ERROR = 128            # A job raised an exception during execution
+EVENT_JOB_MISSED = 256           # A job's execution was missed
+EVENT_ALL = (EVENT_SCHEDULER_START | EVENT_SCHEDULER_SHUTDOWN |
+             EVENT_JOBSTORE_ADDED | EVENT_JOBSTORE_REMOVED |
+             EVENT_JOBSTORE_JOB_ADDED | EVENT_JOBSTORE_JOB_REMOVED |
+             EVENT_JOB_EXECUTED | EVENT_JOB_ERROR | EVENT_JOB_MISSED)
+
+
+class SchedulerEvent(object):
+    """
+    An event that concerns the scheduler itself.
+
+    :var code: the type code of this event
+    """
+    def __init__(self, code):
+        self.code = code
+
+
+class JobStoreEvent(SchedulerEvent):
+    """
+    An event that concerns job stores.
+
+    :var alias: the alias of the job store involved
+    :var job: the new job if a job was added
+    """
+    def __init__(self, code, alias, job=None):
+        SchedulerEvent.__init__(self, code)
+        self.alias = alias
+        if job:
+            self.job = job
+
+
+class JobEvent(SchedulerEvent):
+    """
+    An event that concerns the execution of individual jobs.
+
+    :var job: the job instance in question
+    :var scheduled_run_time: the time when the job was scheduled to be run
+    :var retval: the return value of the successfully executed job
+    :var exception: the exception raised by the job
+    :var traceback: the traceback object associated with the exception
+    """
+    def __init__(self, code, job, scheduled_run_time, retval=None,
+                 exception=None, traceback=None):
+        SchedulerEvent.__init__(self, code)
+        self.job = job
+        self.scheduled_run_time = scheduled_run_time
+        self.retval = retval
+        self.exception = exception
+        self.traceback = traceback

libs/apscheduler/job.py

@@ -0,0 +1,134 @@
+"""
+Jobs represent scheduled tasks.
+"""
+
+from threading import Lock
+from datetime import timedelta
+
+from apscheduler.util import to_unicode, ref_to_obj, get_callable_name,\
+    obj_to_ref
+
+
+class MaxInstancesReachedError(Exception):
+    pass
+
+
+class Job(object):
+    """
+    Encapsulates the actual Job along with its metadata. Job instances
+    are created by the scheduler when adding jobs, and it should not be
+    directly instantiated.
+
+    :param trigger: trigger that determines the execution times
+    :param func: callable to call when the trigger is triggered
+    :param args: list of positional arguments to call func with
+    :param kwargs: dict of keyword arguments to call func with
+    :param name: name of the job (optional)
+    :param misfire_grace_time: seconds after the designated run time that
+        the job is still allowed to be run
+    :param coalesce: run once instead of many times if the scheduler determines
+        that the job should be run more than once in succession
+    :param max_runs: maximum number of times this job is allowed to be
+        triggered
+    :param max_instances: maximum number of concurrently running
+        instances allowed for this job
+    """
+    id = None
+    next_run_time = None
+
+    def __init__(self, trigger, func, args, kwargs, misfire_grace_time,
+                 coalesce, name=None, max_runs=None, max_instances=1):
+        if not trigger:
+            raise ValueError('The trigger must not be None')
+        if not hasattr(func, '__call__'):
+            raise TypeError('func must be callable')
+        if not hasattr(args, '__getitem__'):
+            raise TypeError('args must be a list-like object')
+        if not hasattr(kwargs, '__getitem__'):
+            raise TypeError('kwargs must be a dict-like object')
+        if misfire_grace_time <= 0:
+            raise ValueError('misfire_grace_time must be a positive value')
+        if max_runs is not None and max_runs <= 0:
+            raise ValueError('max_runs must be a positive value')
+        if max_instances <= 0:
+            raise ValueError('max_instances must be a positive value')
+
+        self._lock = Lock()
+
+        self.trigger = trigger
+        self.func = func
+        self.args = args
+        self.kwargs = kwargs
+        self.name = to_unicode(name or get_callable_name(func))
+        self.misfire_grace_time = misfire_grace_time
+        self.coalesce = coalesce
+        self.max_runs = max_runs
+        self.max_instances = max_instances
+        self.runs = 0
+        self.instances = 0
+
+    def compute_next_run_time(self, now):
+        if self.runs == self.max_runs:
+            self.next_run_time = None
+        else:
+            self.next_run_time = self.trigger.get_next_fire_time(now)
+
+        return self.next_run_time
+
+    def get_run_times(self, now):
+        """
+        Computes the scheduled run times between ``next_run_time`` and ``now``.
+        """
+        run_times = []
+        run_time = self.next_run_time
+        increment = timedelta(microseconds=1)
+        while ((not self.max_runs or self.runs < self.max_runs) and
+               run_time and run_time <= now):
+            run_times.append(run_time)
+            run_time = self.trigger.get_next_fire_time(run_time + increment)
+
+        return run_times
+
+    def add_instance(self):
+        self._lock.acquire()
+        try:
+            if self.instances == self.max_instances:
+                raise MaxInstancesReachedError
+            self.instances += 1
+        finally:
+            self._lock.release()
+
+    def remove_instance(self):
+        self._lock.acquire()
+        try:
+            assert self.instances > 0, 'Already at 0 instances'
+            self.instances -= 1
+        finally:
+            self._lock.release()
+
+    def __getstate__(self):
+        # Prevents the unwanted pickling of transient or unpicklable variables
+        state = self.__dict__.copy()
+        state.pop('instances', None)
+        state.pop('func', None)
+        state.pop('_lock', None)
+        state['func_ref'] = obj_to_ref(self.func)
+        return state
+
+    def __setstate__(self, state):
+        state['instances'] = 0
+        state['func'] = ref_to_obj(state.pop('func_ref'))
+        state['_lock'] = Lock()
+        self.__dict__ = state
+
+    def __eq__(self, other):
+        if isinstance(other, Job):
+            return self.id is not None and other.id == self.id or self is other
+        return NotImplemented
+
+    def __repr__(self):
+        return '<Job (name=%s, trigger=%s)>' % (self.name, repr(self.trigger))
+
+    def __str__(self):
+        return '%s (trigger: %s, next run at: %s)' % (self.name,
+            str(self.trigger), str(self.next_run_time))

libs/apscheduler/jobstores/base.py

@@ -0,0 +1,25 @@
+"""
+Abstract base class that provides the interface needed by all job stores.
+Job store methods are also documented here.
+"""
+
+
+class JobStore(object):
+    def add_job(self, job):
+        """Adds the given job from this store."""
+        raise NotImplementedError
+
+    def update_job(self, job):
+        """Persists the running state of the given job."""
+        raise NotImplementedError
+
+    def remove_job(self, job):
+        """Removes the given jobs from this store."""
+        raise NotImplementedError
+
+    def load_jobs(self):
+        """Loads jobs from this store into memory."""
+        raise NotImplementedError
+
+    def close(self):
+        """Frees any resources still bound to this job store."""

libs/apscheduler/jobstores/mongodb_store.py

@@ -0,0 +1,84 @@
+"""
+Stores jobs in a MongoDB database.
+"""
+import logging
+
+from apscheduler.jobstores.base import JobStore
+from apscheduler.job import Job
+
+try:
+    import cPickle as pickle
+except ImportError:  # pragma: nocover
+    import pickle
+
+try:
+    from bson.binary import Binary
+    from pymongo.connection import Connection
+except ImportError:  # pragma: nocover
+    raise ImportError('MongoDBJobStore requires PyMongo installed')
+
+logger = logging.getLogger(__name__)
+
+
+class MongoDBJobStore(JobStore):
+    def __init__(self, database='apscheduler', collection='jobs',
+                 connection=None, pickle_protocol=pickle.HIGHEST_PROTOCOL,
+                 **connect_args):
+        self.jobs = []
+        self.pickle_protocol = pickle_protocol
+
+        if not database:
+            raise ValueError('The "database" parameter must not be empty')
+        if not collection:
+            raise ValueError('The "collection" parameter must not be empty')
+
+        if connection:
+            self.connection = connection
+        else:
+            self.connection = Connection(**connect_args)
+
+        self.collection = self.connection[database][collection]
+
+    def add_job(self, job):
+        job_dict = job.__getstate__()
+        job_dict['trigger'] = Binary(pickle.dumps(job.trigger,
+                                                  self.pickle_protocol))
+        job_dict['args'] = Binary(pickle.dumps(job.args,
+                                               self.pickle_protocol))
+        job_dict['kwargs'] = Binary(pickle.dumps(job.kwargs,
+                                                 self.pickle_protocol))
+        job.id = self.collection.insert(job_dict)
+        self.jobs.append(job)
+
+    def remove_job(self, job):
+        self.collection.remove(job.id)
+        self.jobs.remove(job)
+
+    def load_jobs(self):
+        jobs = []
+        for job_dict in self.collection.find():
+            try:
+                job = Job.__new__(Job)
+                job_dict['id'] = job_dict.pop('_id')
+                job_dict['trigger'] = pickle.loads(job_dict['trigger'])
+                job_dict['args'] = pickle.loads(job_dict['args'])
+                job_dict['kwargs'] = pickle.loads(job_dict['kwargs'])
+                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 update_job(self, job):
+        spec = {'_id': job.id}
+        document = {'$set': {'next_run_time': job.next_run_time},
+                    '$inc': {'runs': 1}}
+        self.collection.update(spec, document)
+
+    def close(self):
+        self.connection.disconnect()
+
+    def __repr__(self):
+        connection = self.collection.database.connection
+        return '<%s (connection=%s)>' % (self.__class__.__name__, connection)

libs/apscheduler/jobstores/ram_store.py

@@ -0,0 +1,25 @@
+"""
+Stores jobs in an array in RAM. Provides no persistence support.
+"""
+
+from apscheduler.jobstores.base import JobStore
+
+
+class RAMJobStore(JobStore):
+    def __init__(self):
+        self.jobs = []
+    
+    def add_job(self, job):
+        self.jobs.append(job)
+
+    def update_job(self, job):
+        pass
+
+    def remove_job(self, job):
+        self.jobs.remove(job)
+
+    def load_jobs(self):
+        pass
+
+    def __repr__(self):
+        return '<%s>' % (self.__class__.__name__)

libs/apscheduler/jobstores/shelve_store.py

@@ -0,0 +1,65 @@
+"""
+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)

libs/apscheduler/jobstores/sqlalchemy_store.py

@@ -0,0 +1,87 @@
+"""
+Stores jobs in a database table using SQLAlchemy.
+"""
+import pickle
+import logging
+
+from apscheduler.jobstores.base import JobStore
+from apscheduler.job import Job
+
+try:
+    from sqlalchemy import *
+except ImportError:  # pragma: nocover
+    raise ImportError('SQLAlchemyJobStore requires SQLAlchemy installed')
+
+logger = logging.getLogger(__name__)
+
+
+class SQLAlchemyJobStore(JobStore):
+    def __init__(self, url=None, engine=None, tablename='apscheduler_jobs',
+                 metadata=None, pickle_protocol=pickle.HIGHEST_PROTOCOL):
+        self.jobs = []
+        self.pickle_protocol = pickle_protocol
+
+        if engine:
+            self.engine = engine
+        elif url:
+            self.engine = create_engine(url)
+        else:
+            raise ValueError('Need either "engine" or "url" defined')
+
+        self.jobs_t = Table(tablename, metadata or MetaData(),
+            Column('id', Integer,
+                   Sequence(tablename + '_id_seq', optional=True),
+                   primary_key=True),
+            Column('trigger', PickleType(pickle_protocol, mutable=False),
+                   nullable=False),
+            Column('func_ref', String(1024), nullable=False),
+            Column('args', PickleType(pickle_protocol, mutable=False),
+                   nullable=False),
+            Column('kwargs', PickleType(pickle_protocol, mutable=False),
+                   nullable=False),
+            Column('name', Unicode(1024)),
+            Column('misfire_grace_time', Integer, nullable=False),
+            Column('coalesce', Boolean, nullable=False),
+            Column('max_runs', Integer),
+            Column('max_instances', Integer),
+            Column('next_run_time', DateTime, nullable=False),
+            Column('runs', BigInteger))
+
+        self.jobs_t.create(self.engine, True)
+
+    def add_job(self, job):
+        job_dict = job.__getstate__()
+        result = self.engine.execute(self.jobs_t.insert().values(**job_dict))
+        job.id = result.inserted_primary_key[0]
+        self.jobs.append(job)
+
+    def remove_job(self, job):
+        delete = self.jobs_t.delete().where(self.jobs_t.c.id == job.id)
+        self.engine.execute(delete)
+        self.jobs.remove(job)
+
+    def load_jobs(self):
+        jobs = []
+        for row in self.engine.execute(select([self.jobs_t])):
+            try:
+                job = Job.__new__(Job)
+                job_dict = dict(row.items())
+                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 update_job(self, job):
+        job_dict = job.__getstate__()
+        update = self.jobs_t.update().where(self.jobs_t.c.id == job.id).\
+            values(next_run_time=job_dict['next_run_time'],
+                   runs=job_dict['runs'])
+        self.engine.execute(update)
+
+    def close(self):
+        self.engine.dispose()
+
+    def __repr__(self):
+        return '<%s (url=%s)>' % (self.__class__.__name__, self.engine.url)

libs/apscheduler/scheduler.py

@@ -1,83 +1,32 @@
 """
-This module is the main part of the library, and is the only module that
-regular users should be concerned with.
+This module is the main part of the library. It houses the Scheduler class
+and related exceptions.
 """
+
 from threading import Thread, Event, Lock
 from datetime import datetime, timedelta
 from logging import getLogger
 import os
+import sys
 
-from apscheduler.util import time_difference, asbool
-from apscheduler.triggers import DateTrigger, IntervalTrigger, CronTrigger
-
+from apscheduler.util import *
+from apscheduler.triggers import SimpleTrigger, IntervalTrigger, CronTrigger
+from apscheduler.jobstores.ram_store import RAMJobStore
+from apscheduler.job import Job, MaxInstancesReachedError
+from apscheduler.events import *
+from apscheduler.threadpool import ThreadPool
 
 logger = getLogger(__name__)
 
 
-class Job(object):
-    """
-    Represents a task scheduled in the scheduler.
-    """
-
-    def __init__(self, trigger, func, args, kwargs):
-        self.thread = None
-        self.trigger = trigger
-        self.func = func
-        self.args = args
-        self.kwargs = kwargs
-        if hasattr(func, '__name__'):
-            self.name = func.__name__
-        else:
-            self.name = str(func)
-
-    def run(self):
-        """
-        Starts the execution of this job in a separate thread.
-        """
-        if (self.thread and self.thread.isAlive()):
-            logger.info('Skipping run of job %s (previously triggered '
-                        'instance is still running)', self)
-        else:
-            self.thread = Thread(target=self.run_in_thread)
-            self.thread.setDaemon(False)
-            self.thread.start()
-
-    def run_in_thread(self):
-        """
-        Runs the associated callable.
-        This method is executed in a dedicated thread.
-        """
-        try:
-            self.func(*self.args, **self.kwargs)
-        except:
-            logger.exception('Error executing job "%s"', self)
-            raise
-
-    def __str__(self):
-        return '%s: %s' % (self.name, repr(self.trigger))
-
-    def __repr__(self):
-        return '%s(%s, %s)' % (self.__class__.__name__, self.name,
-                               repr(self.trigger))
-
-
-class SchedulerShutdownError(Exception):
-    """
-    Thrown when attempting to use the scheduler after
-    it's been shut down.
-    """
-
-    def __init__(self):
-        Exception.__init__(self, 'Scheduler has already been shut down')
-
-
 class SchedulerAlreadyRunningError(Exception):
     """
-    Thrown when attempting to start the scheduler, but it's already running.
+    Raised when attempting to start or configure the scheduler when it's
+    already running.
     """
 
-    def __init__(self):
-        Exception.__init__(self, 'Scheduler is already running')
+    def __str__(self):
+        return 'Scheduler is already running'
 
 
 class Scheduler(object):
@@ -86,141 +35,265 @@ class Scheduler(object):
     their execution.
     """
 
-    stopped = False
-    thread = None
-    misfire_grace_time = 1
-    daemonic = True
+    _stopped = False
+    _thread = None
 
-    def __init__(self, **config):
-        self.jobs = []
-        self.jobs_lock = Lock()
-        self.wakeup = Event()
-        self.configure(config)
+    def __init__(self, gconfig={}, **options):
+        self._wakeup = Event()
+        self._jobstores = {}
+        self._jobstores_lock = Lock()
+        self._listeners = []
+        self._listeners_lock = Lock()
+        self._pending_jobs = []
+        self.configure(gconfig, **options)
 
-    def configure(self, config):
+    def configure(self, gconfig={}, **options):
         """
-        Updates the configuration with the given options.
+        Reconfigures the scheduler with the given options. Can only be done
+        when the scheduler isn't running.
         """
-        for key, val in config.items():
-            if key.startswith('apscheduler.'):
-                key = key[12:]
-            if key == 'misfire_grace_time':
-                self.misfire_grace_time = int(val)
-            elif key == 'daemonic':
-                self.daemonic = asbool(val)
+        if self.running:
+            raise SchedulerAlreadyRunningError
+
+        # Set general options
+        config = combine_opts(gconfig, 'apscheduler.', options)
+        self.misfire_grace_time = int(config.pop('misfire_grace_time', 1))
+        self.coalesce = asbool(config.pop('coalesce', True))
+        self.daemonic = asbool(config.pop('daemonic', True))
+
+        # Configure the thread pool
+        if 'threadpool' in config:
+            self._threadpool = maybe_ref(config['threadpool'])
+        else:
+            threadpool_opts = combine_opts(config, 'threadpool.')
+            self._threadpool = ThreadPool(**threadpool_opts)
+
+        # Configure job stores
+        jobstore_opts = combine_opts(config, 'jobstore.')
+        jobstores = {}
+        for key, value in jobstore_opts.items():
+            store_name, option = key.split('.', 1)
+            opts_dict = jobstores.setdefault(store_name, {})
+            opts_dict[option] = value
+
+        for alias, opts in jobstores.items():
+            classname = opts.pop('class')
+            cls = maybe_ref(classname)
+            jobstore = cls(**opts)
+            self.add_jobstore(jobstore, alias, True)
 
     def start(self):
         """
         Starts the scheduler in a new thread.
         """
-        if self.thread and self.thread.isAlive():
+        if self.running:
             raise SchedulerAlreadyRunningError
-        
-        self.stopped = False
-        self.thread = Thread(target=self.run, name='APScheduler')
-        self.thread.setDaemon(self.daemonic)
-        self.thread.start()
-        logger.info('Scheduler started')
 
-    def shutdown(self, timeout=0):
+        # Create a RAMJobStore as the default if there is no default job store
+        if not 'default' in self._jobstores:
+            self.add_jobstore(RAMJobStore(), 'default', True)
+
+        # Schedule all pending jobs
+        for job, jobstore in self._pending_jobs:
+            self._real_add_job(job, jobstore, False)
+        del self._pending_jobs[:]
+
+        self._stopped = False
+        self._thread = Thread(target=self._main_loop, name='APScheduler')
+        self._thread.setDaemon(self.daemonic)
+        self._thread.start()
+
+    def shutdown(self, wait=True, shutdown_threadpool=True):
         """
         Shuts down the scheduler and terminates the thread.
-        Does not terminate any currently running jobs.
+        Does not interrupt any currently running jobs.
 
-        :param timeout: time (in seconds) to wait for the scheduler thread to
-            terminate, 0 to wait forever, None to skip waiting
+        :param wait: ``True`` to wait until all currently executing jobs have
+                     finished (if ``shutdown_threadpool`` is also ``True``)
+        :param shutdown_threadpool: ``True`` to shut down the thread pool
         """
-        if self.stopped or not self.thread.isAlive():
+        if not self.running:
             return
 
-        logger.info('Scheduler shutting down')
-        self.stopped = True
-        self.wakeup.set()
-        if timeout is not None:
-            self.thread.join(timeout)
-        self.jobs = []
+        self._stopped = True
+        self._wakeup.set()
 
-    def cron_schedule(self, year='*', month='*', day='*', week='*',
-                      day_of_week='*', hour='*', minute='*', second='*',
-                      args=None, kwargs=None):
-        """
-        Decorator that causes its host function to be scheduled
-        according to the given parameters.
-        This decorator does not wrap its host function.
-        The scheduled function will be called without any arguments.
-        See :meth:`add_cron_job` for more information.
-        """
-        def inner(func):
-            self.add_cron_job(func, year, month, day, week, day_of_week, hour,
-                              minute, second, args, kwargs)
-            return func
-        return inner
+        # Shut down the thread pool
+        if shutdown_threadpool:
+            self._threadpool.shutdown(wait)
 
-    def interval_schedule(self, weeks=0, days=0, hours=0, minutes=0, seconds=0,
-                          start_date=None, repeat=0, args=None, kwargs=None):
-        """
-        Decorator that causes its host function to be scheduled
-        for execution on specified intervals.
-        This decorator does not wrap its host function.
-        The scheduled function will be called without any arguments.
-        Note that the default repeat value is 0, which means to repeat forever.
-        See :meth:`add_delayed_job` for more information.
-        """
-        def inner(func):
-            self.add_interval_job(func, weeks, days, hours, minutes, seconds,
-                                  start_date, repeat, args, kwargs)
-            return func
-        return inner
+        # Wait until the scheduler thread terminates
+        self._thread.join()
 
-    def _add_job(self, trigger, func, args, kwargs):
+    @property
+    def running(self):
+        return not self._stopped and self._thread and self._thread.isAlive()
+
+    def add_jobstore(self, jobstore, alias, quiet=False):
         """
-        Adds a Job to the job list and notifies the scheduler thread.
+        Adds a job store to this scheduler.
 
-        :param trigger: trigger for the given callable
-        :param args: list of positional arguments to call func with
-        :param kwargs: dict of keyword arguments to call func with
-        :return: the scheduled job
-        :rtype: Job
+        :param jobstore: job store to be added
+        :param alias: alias for the job store
+        :param quiet: True to suppress scheduler thread wakeup
+        :type jobstore: instance of
+            :class:`~apscheduler.jobstores.base.JobStore`
+        :type alias: str
         """
-        if self.stopped:
-            raise SchedulerShutdownError
-        if not hasattr(func, '__call__'):
-            raise TypeError('func must be callable')
-
-        if args is None:
-            args = []
-        if kwargs is None:
-            kwargs = {}
-
-        job = Job(trigger, func, args, kwargs)
-        self.jobs_lock.acquire()
+        self._jobstores_lock.acquire()
         try:
-            self.jobs.append(job)
+            if alias in self._jobstores:
+                raise KeyError('Alias "%s" is already in use' % alias)
+            self._jobstores[alias] = jobstore
+            jobstore.load_jobs()
         finally:
-            self.jobs_lock.release()
-        logger.info('Added job "%s"', job)
+            self._jobstores_lock.release()
+
+        # Notify listeners that a new job store has been added
+        self._notify_listeners(JobStoreEvent(EVENT_JOBSTORE_ADDED, alias))
+
+        # Notify the scheduler so it can scan the new job store for jobs
+        if not quiet:
+            self._wakeup.set()
+
+    def remove_jobstore(self, alias):
+        """
+        Removes the job store by the given alias from this scheduler.
+
+        :type alias: str
+        """
+        self._jobstores_lock.acquire()
+        try:
+            try:
+                del self._jobstores[alias]
+            except KeyError:
+                raise KeyError('No such job store: %s' % alias)
+        finally:
+            self._jobstores_lock.release()
+
+        # Notify listeners that a job store has been removed
+        self._notify_listeners(JobStoreEvent(EVENT_JOBSTORE_REMOVED, alias))
+
+    def add_listener(self, callback, mask=EVENT_ALL):
+        """
+        Adds a listener for scheduler events. When a matching event occurs,
+        ``callback`` is executed with the event object as its sole argument.
+        If the ``mask`` parameter is not provided, the callback will receive
+        events of all types.
+
+        :param callback: any callable that takes one argument
+        :param mask: bitmask that indicates which events should be listened to
+        """
+        self._listeners_lock.acquire()
+        try:
+            self._listeners.append((callback, mask))
+        finally:
+            self._listeners_lock.release()
+
+    def remove_listener(self, callback):
+        """
+        Removes a previously added event listener.
+        """
+        self._listeners_lock.acquire()
+        try:
+            for i, (cb, _) in enumerate(self._listeners):
+                if callback == cb:
+                    del self._listeners[i]
+        finally:
+            self._listeners_lock.release()
+
+    def _notify_listeners(self, event):
+        self._listeners_lock.acquire()
+        try:
+            listeners = tuple(self._listeners)
+        finally:
+            self._listeners_lock.release()
+
+        for cb, mask in listeners:
+            if event.code & mask:
+                try:
+                    cb(event)
+                except:
+                    logger.exception('Error notifying listener')
+
+    def _real_add_job(self, job, jobstore, wakeup):
+        job.compute_next_run_time(datetime.now())
+        if not job.next_run_time:
+            raise ValueError('Not adding job since it would never be run')
+
+        self._jobstores_lock.acquire()
+        try:
+            try:
+                store = self._jobstores[jobstore]
+            except KeyError:
+                raise KeyError('No such job store: %s' % jobstore)
+            store.add_job(job)
+        finally:
+            self._jobstores_lock.release()
+
+        # Notify listeners that a new job has been added
+        event = JobStoreEvent(EVENT_JOBSTORE_JOB_ADDED, jobstore, job)
+        self._notify_listeners(event)
+
+        logger.info('Added job "%s" to job store "%s"', job, jobstore)
 
         # Notify the scheduler about the new job
-        self.wakeup.set()
+        if wakeup:
+            self._wakeup.set()
 
+    def add_job(self, trigger, func, args, kwargs, jobstore='default',
+                **options):
+        """
+        Adds the given job to the job list and notifies the scheduler thread.
+
+        :param trigger: alias of the job store to store the job in
+        :param func: callable to run at the given time
+        :param args: list of positional arguments to call func with
+        :param kwargs: dict of keyword arguments to call func with
+        :param jobstore: alias of the job store to store the job in
+        :rtype: :class:`~apscheduler.job.Job`
+        """
+        job = Job(trigger, func, args or [], kwargs or {},
+                  options.pop('misfire_grace_time', self.misfire_grace_time),
+                  options.pop('coalesce', self.coalesce), **options)
+        if not self.running:
+            self._pending_jobs.append((job, jobstore))
+            logger.info('Adding job tentatively -- it will be properly '
+                        'scheduled when the scheduler starts')
+        else:
+            self._real_add_job(job, jobstore, True)
         return job
 
-    def add_date_job(self, func, date, args=None, kwargs=None):
-        """
-        Adds a job to be completed on a specific date and time.
+    def _remove_job(self, job, alias, jobstore):
+        jobstore.remove_job(job)
 
-        :param func: callable to run
-        :param args: positional arguments to call func with
-        :param kwargs: keyword arguments to call func with
+        # Notify listeners that a job has been removed
+        event = JobStoreEvent(EVENT_JOBSTORE_JOB_REMOVED, alias, job)
+        self._notify_listeners(event)
+
+        logger.info('Removed job "%s"', job)
+
+    def add_date_job(self, func, date, args=None, kwargs=None, **options):
         """
-        trigger = DateTrigger(date)
-        return self._add_job(trigger, func, args, kwargs)
+        Schedules a job to be completed on a specific date and time.
+
+        :param func: callable to run at the given time
+        :param date: the date/time to run the job at
+        :param name: name of the job
+        :param jobstore: stored the job in the named (or given) job store
+        :param misfire_grace_time: seconds after the designated run time that
+            the job is still allowed to be run
+        :type date: :class:`datetime.date`
+        :rtype: :class:`~apscheduler.job.Job`
+        """
+        trigger = SimpleTrigger(date)
+        return self.add_job(trigger, func, args, kwargs, **options)
 
     def add_interval_job(self, func, weeks=0, days=0, hours=0, minutes=0,
-                         seconds=0, start_date=None, repeat=0, args=None,
-                         kwargs=None):
+                         seconds=0, start_date=None, args=None, kwargs=None,
+                         **options):
         """
-        Adds a job to be completed on specified intervals.
+        Schedules a job to be completed on specified intervals.
 
         :param func: callable to run
         :param weeks: number of weeks to wait
@@ -230,25 +303,29 @@ class Scheduler(object):
         :param seconds: number of seconds to wait
         :param start_date: when to first execute the job and start the
             counter (default is after the given interval)
-        :param repeat: number of times the job will be run (0 = repeat
-            indefinitely)
         :param args: list of positional arguments to call func with
         :param kwargs: dict of keyword arguments to call func with
+        :param name: name of the job
+        :param jobstore: alias of the job store to add the job to
+        :param misfire_grace_time: seconds after the designated run time that
+            the job is still allowed to be run
+        :rtype: :class:`~apscheduler.job.Job`
         """
         interval = timedelta(weeks=weeks, days=days, hours=hours,
                              minutes=minutes, seconds=seconds)
-        trigger = IntervalTrigger(interval, repeat, start_date)
-        return self._add_job(trigger, func, args, kwargs)
+        trigger = IntervalTrigger(interval, start_date)
+        return self.add_job(trigger, func, args, kwargs, **options)
 
-    def add_cron_job(self, func, year='*', month='*', day='*', week='*',
-                     day_of_week='*', hour='*', minute='*', second='*',
-                     args=None, kwargs=None):
+    def add_cron_job(self, func, year=None, month=None, day=None, week=None,
+                     day_of_week=None, hour=None, minute=None, second=None,
+                     start_date=None, args=None, kwargs=None, **options):
         """
-        Adds a job to be completed on times that match the given expressions.
+        Schedules a job to be completed on times that match the given
+        expressions.
 
         :param func: callable to run
         :param year: year to run on
-        :param month: month to run on (0 = January)
+        :param month: month to run on
         :param day: day of month to run on
         :param week: week of the year to run on
         :param day_of_week: weekday to run on (0 = Monday)
@@ -256,152 +333,227 @@ class Scheduler(object):
         :param second: second to run on
         :param args: list of positional arguments to call func with
         :param kwargs: dict of keyword arguments to call func with
+        :param name: name of the job
+        :param jobstore: alias of the job store to add the job to
+        :param misfire_grace_time: seconds after the designated run time that
+            the job is still allowed to be run
         :return: the scheduled job
-        :rtype: Job
+        :rtype: :class:`~apscheduler.job.Job`
         """
         trigger = CronTrigger(year=year, month=month, day=day, week=week,
                               day_of_week=day_of_week, hour=hour,
-                              minute=minute, second=second)
-        return self._add_job(trigger, func, args, kwargs)
+                              minute=minute, second=second,
+                              start_date=start_date)
+        return self.add_job(trigger, func, args, kwargs, **options)
 
-    def is_job_active(self, job):
+    def cron_schedule(self, **options):
         """
-        Determines if the given job is still on the job list.
+        Decorator version of :meth:`add_cron_job`.
+        This decorator does not wrap its host function.
+        Unscheduling decorated functions is possible by passing the ``job``
+        attribute of the scheduled function to :meth:`unschedule_job`.
+        """
+        def inner(func):
+            func.job = self.add_cron_job(func, **options)
+            return func
+        return inner
 
-        :return: True if the job is still active, False if not
+    def interval_schedule(self, **options):
         """
-        self.jobs_lock.acquire()
+        Decorator version of :meth:`add_interval_job`.
+        This decorator does not wrap its host function.
+        Unscheduling decorated functions is possible by passing the ``job``
+        attribute of the scheduled function to :meth:`unschedule_job`.
+        """
+        def inner(func):
+            func.job = self.add_interval_job(func, **options)
+            return func
+        return inner
+
+    def get_jobs(self):
+        """
+        Returns a list of all scheduled jobs.
+
+        :return: list of :class:`~apscheduler.job.Job` objects
+        """
+        self._jobstores_lock.acquire()
         try:
-            return job in self.jobs
+            jobs = []
+            for jobstore in itervalues(self._jobstores):
+                jobs.extend(jobstore.jobs)
+            return jobs
         finally:
-            self.jobs_lock.release()
+            self._jobstores_lock.release()
 
     def unschedule_job(self, job):
         """
-        Removes a job, preventing it from being fired any more.
+        Removes a job, preventing it from being run any more.
         """
-        self.jobs_lock.acquire()
+        self._jobstores_lock.acquire()
         try:
-            self.jobs.remove(job)
+            for alias, jobstore in iteritems(self._jobstores):
+                if job in list(jobstore.jobs):
+                    self._remove_job(job, alias, jobstore)
+                    return
         finally:
-            self.jobs_lock.release()
-        logger.info('Removed job "%s"', job)
-        self.wakeup.set()
+            self._jobstores_lock.release()
+
+        raise KeyError('Job "%s" is not scheduled in any job store' % job)
 
     def unschedule_func(self, func):
         """
         Removes all jobs that would execute the given function.
         """
-        self.jobs_lock.acquire()
+        found = False
+        self._jobstores_lock.acquire()
         try:
-            remove_list = [job for job in self.jobs if job.func == func]
-            for job in remove_list:
-                self.jobs.remove(job)
-                logger.info('Removed job "%s"', job)
+            for alias, jobstore in iteritems(self._jobstores):
+                for job in list(jobstore.jobs):
+                    if job.func == func:
+                        self._remove_job(job, alias, jobstore)
+                        found = True
         finally:
-            self.jobs_lock.release()
+            self._jobstores_lock.release()
 
-        # Have the scheduler calculate a new wakeup time
-        self.wakeup.set()
+        if not found:
+            raise KeyError('The given function is not scheduled in this '
+                           'scheduler')
 
-    def dump_jobs(self):
+    def print_jobs(self, out=None):
         """
-        Gives a textual listing of all jobs currently scheduled on this
+        Prints out a textual listing of all jobs currently scheduled on this
         scheduler.
 
-        :rtype: str
+        :param out: a file-like object to print to (defaults to **sys.stdout**
+                    if nothing is given)
         """
+        out = out or sys.stdout
         job_strs = []
-        now = datetime.now()
-        self.jobs_lock.acquire()
+        self._jobstores_lock.acquire()
         try:
-            for job in self.jobs:
-                next_fire_time = job.trigger.get_next_fire_time(now)
-                job_str = '%s (next fire time: %s)' % (str(job),
-                                                       next_fire_time)
-                job_strs.append(job_str)
+            for alias, jobstore in iteritems(self._jobstores):
+                job_strs.append('Jobstore %s:' % alias)
+                if jobstore.jobs:
+                    for job in jobstore.jobs:
+                        job_strs.append('    %s' % job)
+                else:
+                    job_strs.append('    No scheduled jobs')
         finally:
-            self.jobs_lock.release()
+            self._jobstores_lock.release()
 
-        if job_strs:
-            return os.linesep.join(job_strs)
-        return 'No jobs currently scheduled.'
+        out.write(os.linesep.join(job_strs) + os.linesep)
 
-    def _get_next_wakeup_time(self, now):
+    def _run_job(self, job, run_times):
         """
-        Determines the time of the next job execution, and removes finished
-        jobs.
-
-        :param now: the result of datetime.now(), generated elsewhere for
-            consistency.
+        Acts as a harness that runs the actual job code in a thread.
         """
-        next_wakeup = None
-        finished_jobs = []
+        for run_time in run_times:
+            # See if the job missed its run time window, and handle possible
+            # misfires accordingly
+            difference = datetime.now() - run_time
+            grace_time = timedelta(seconds=job.misfire_grace_time)
+            if difference > grace_time:
+                # Notify listeners about a missed run
+                event = JobEvent(EVENT_JOB_MISSED, job, run_time)
+                self._notify_listeners(event)
+                logger.warning('Run time of job "%s" was missed by %s',
+                               job, difference)
+            else:
+                try:
+                    job.add_instance()
+                except MaxInstancesReachedError:
+                    event = JobEvent(EVENT_JOB_MISSED, job, run_time)
+                    self._notify_listeners(event)
+                    logger.warning('Execution of job "%s" skipped: '
+                                   'maximum number of running instances '
+                                   'reached (%d)', job, job.max_instances)
+                    break
 
-        self.jobs_lock.acquire()
+                logger.info('Running job "%s" (scheduled at %s)', job,
+                            run_time)
+
+                try:
+                    retval = job.func(*job.args, **job.kwargs)
+                except:
+                    # Notify listeners about the exception
+                    exc, tb = sys.exc_info()[1:]
+                    event = JobEvent(EVENT_JOB_ERROR, job, run_time,
+                                     exception=exc, traceback=tb)
+                    self._notify_listeners(event)
+
+                    logger.exception('Job "%s" raised an exception', job)
+                else:
+                    # Notify listeners about successful execution
+                    event = JobEvent(EVENT_JOB_EXECUTED, job, run_time,
+                                     retval=retval)
+                    self._notify_listeners(event)
+
+                    logger.info('Job "%s" executed successfully', job)
+
+                job.remove_instance()
+
+                # If coalescing is enabled, don't attempt any further runs
+                if job.coalesce:
+                    break
+
+    def _process_jobs(self, now):
+        """
+        Iterates through jobs in every jobstore, starts pending jobs
+        and figures out the next wakeup time.
+        """
+        next_wakeup_time = None
+        self._jobstores_lock.acquire()
         try:
-            for job in self.jobs:
-                next_run = job.trigger.get_next_fire_time(now)
-                if next_run is None:
-                    finished_jobs.append(job)
-                elif next_run and (next_wakeup is None or \
-                                   next_run < next_wakeup):
-                    next_wakeup = next_run
+            for alias, jobstore in iteritems(self._jobstores):
+                for job in tuple(jobstore.jobs):
+                    run_times = job.get_run_times(now)
+                    if run_times:
+                        self._threadpool.submit(self._run_job, job, run_times)
 
-            # Clear out any finished jobs
-            for job in finished_jobs:
-                self.jobs.remove(job)
-                logger.info('Removed finished job "%s"', job)
+                        # Increase the job's run count
+                        if job.coalesce:
+                            job.runs += 1
+                        else:
+                            job.runs += len(run_times)
+
+                        # Update the job, but don't keep finished jobs around
+                        if job.compute_next_run_time(now + timedelta(microseconds=1)):
+                            jobstore.update_job(job)
+                        else:
+                            self._remove_job(job, alias, jobstore)
+
+                    if not next_wakeup_time:
+                        next_wakeup_time = job.next_run_time
+                    elif job.next_run_time:
+                        next_wakeup_time = min(next_wakeup_time,
+                                               job.next_run_time)
+            return next_wakeup_time
         finally:
-            self.jobs_lock.release()
+            self._jobstores_lock.release()
 
-        return next_wakeup
+    def _main_loop(self):
+        """Executes jobs on schedule."""
 
-    def _get_current_jobs(self):
-        """
-        Determines which jobs should be executed right now.
-        """
-        current_jobs = []
-        now = datetime.now()
-        start = now - timedelta(seconds=self.misfire_grace_time)
+        logger.info('Scheduler started')
+        self._notify_listeners(SchedulerEvent(EVENT_SCHEDULER_START))
 
-        self.jobs_lock.acquire()
-        try:
-            for job in self.jobs:
-                next_run = job.trigger.get_next_fire_time(start)
-                if next_run:
-                    time_diff = time_difference(now, next_run)
-                    if next_run < now and time_diff <= self.misfire_grace_time:
-                        current_jobs.append(job)
-        finally:
-            self.jobs_lock.release()
-
-        return current_jobs
-
-    def run(self):
-        """
-        Runs the main loop of the scheduler.
-        """
-        self.wakeup.clear()
-        while not self.stopped:
-            # Execute any jobs scheduled to be run right now
-            for job in self._get_current_jobs():
-                logger.debug('Executing job "%s"', job)
-                job.run()
-
-            # Figure out when the next job should be run, and
-            # adjust the wait time accordingly
+        self._wakeup.clear()
+        while not self._stopped:
+            logger.debug('Looking for jobs to run')
             now = datetime.now()
-            next_wakeup_time = self._get_next_wakeup_time(now)
+            next_wakeup_time = self._process_jobs(now)
 
             # Sleep until the next job is scheduled to be run,
-            # or a new job is added, or the scheduler is stopped
+            # a new job is added or the scheduler is stopped
             if next_wakeup_time is not None:
                 wait_seconds = time_difference(next_wakeup_time, now)
                 logger.debug('Next wakeup is due at %s (in %f seconds)',
                              next_wakeup_time, wait_seconds)
-                self.wakeup.wait(wait_seconds)
+                self._wakeup.wait(wait_seconds)
             else:
                 logger.debug('No jobs; waiting until a job is added')
-                self.wakeup.wait()
-            self.wakeup.clear()
+                self._wakeup.wait()
+            self._wakeup.clear()
+
+        logger.info('Scheduler has been shut down')
+        self._notify_listeners(SchedulerEvent(EVENT_SCHEDULER_SHUTDOWN))

libs/apscheduler/threadpool.py

@@ -0,0 +1,133 @@
+"""
+Generic thread pool class. Modeled after Java's ThreadPoolExecutor.
+Please note that this ThreadPool does *not* fully implement the PEP 3148
+ThreadPool!
+"""
+
+from threading import Thread, Lock, currentThread
+from weakref import ref
+import logging
+import atexit
+
+try:
+    from queue import Queue, Empty
+except ImportError:
+    from Queue import Queue, Empty
+
+logger = logging.getLogger(__name__)
+_threadpools = set()
+
+
+# Worker threads are daemonic in order to let the interpreter exit without
+# an explicit shutdown of the thread pool. The following trick is necessary
+# to allow worker threads to finish cleanly.
+def _shutdown_all():
+    for pool_ref in tuple(_threadpools):
+        pool = pool_ref()
+        if pool:
+            pool.shutdown()
+
+atexit.register(_shutdown_all)
+
+
+class ThreadPool(object):
+    def __init__(self, core_threads=0, max_threads=20, keepalive=1):
+        """
+        :param core_threads: maximum number of persistent threads in the pool
+        :param max_threads: maximum number of total threads in the pool
+        :param thread_class: callable that creates a Thread object
+        :param keepalive: seconds to keep non-core worker threads waiting
+            for new tasks
+        """
+        self.core_threads = core_threads
+        self.max_threads = max(max_threads, core_threads, 1)
+        self.keepalive = keepalive
+        self._queue = Queue()
+        self._threads_lock = Lock()
+        self._threads = set()
+        self._shutdown = False
+
+        _threadpools.add(ref(self))
+        logger.info('Started thread pool with %d core threads and %s maximum '
+                    'threads', core_threads, max_threads or 'unlimited')
+
+    def _adjust_threadcount(self):
+        self._threads_lock.acquire()
+        try:
+            if self.num_threads < self.max_threads:
+                self._add_thread(self.num_threads < self.core_threads)
+        finally:
+            self._threads_lock.release()
+
+    def _add_thread(self, core):
+        t = Thread(target=self._run_jobs, args=(core,))
+        t.setDaemon(True)
+        t.start()
+        self._threads.add(t)
+
+    def _run_jobs(self, core):
+        logger.debug('Started worker thread')
+        block = True
+        timeout = None
+        if not core:
+            block = self.keepalive > 0
+            timeout = self.keepalive
+
+        while True:
+            try:
+                func, args, kwargs = self._queue.get(block, timeout)
+            except Empty:
+                break
+
+            if self._shutdown:
+                break
+
+            try:
+                func(*args, **kwargs)
+            except:
+                logger.exception('Error in worker thread')
+
+        self._threads_lock.acquire()
+        self._threads.remove(currentThread())
+        self._threads_lock.release()
+
+        logger.debug('Exiting worker thread')
+
+    @property
+    def num_threads(self):
+        return len(self._threads)
+
+    def submit(self, func, *args, **kwargs):
+        if self._shutdown:
+            raise RuntimeError('Cannot schedule new tasks after shutdown')
+
+        self._queue.put((func, args, kwargs))
+        self._adjust_threadcount()
+
+    def shutdown(self, wait=True):
+        if self._shutdown:
+            return
+
+        logging.info('Shutting down thread pool')
+        self._shutdown = True
+        _threadpools.remove(ref(self))
+
+        self._threads_lock.acquire()
+        for _ in range(self.num_threads):
+            self._queue.put((None, None, None))
+        self._threads_lock.release()
+
+        if wait:
+            self._threads_lock.acquire()
+            threads = tuple(self._threads)
+            self._threads_lock.release()
+            for thread in threads:
+                thread.join()
+
+    def __repr__(self):
+        if self.max_threads:
+            threadcount = '%d/%d' % (self.num_threads, self.max_threads)
+        else:
+            threadcount = '%d' % self.num_threads
+
+        return '<ThreadPool at %x; threads=%s>' % (id(self), threadcount)

libs/apscheduler/triggers/__init__.py

@@ -0,0 +1,3 @@
+from apscheduler.triggers.cron import CronTrigger
+from apscheduler.triggers.interval import IntervalTrigger
+from apscheduler.triggers.simple import SimpleTrigger

libs/apscheduler/triggers/cron/__init__.py

@@ -1,13 +1,7 @@
-"""
-Triggers determine the times when a job should be executed.
-"""
-from datetime import datetime, timedelta
-from math import ceil
+from datetime import date, datetime
 
-from apscheduler.fields import *
-from apscheduler.util import *
-
-__all__ = ('CronTrigger', 'DateTrigger', 'IntervalTrigger')
+from apscheduler.triggers.cron.fields import *
+from apscheduler.util import datetime_ceil, convert_to_datetime, iteritems
 
 
 class CronTrigger(object):
@@ -23,11 +17,31 @@ class CronTrigger(object):
                   'second': BaseField}
 
     def __init__(self, **values):
+        self.start_date = values.pop('start_date', None)
+        if self.start_date:
+            self.start_date = convert_to_datetime(self.start_date)
+
+        # Yank out all None valued fields
+        for key, value in list(iteritems(values)):
+            if value is None:
+                del values[key]
+
         self.fields = []
+        assign_defaults = False
         for field_name in self.FIELD_NAMES:
-            exprs = values.get(field_name) or '*'
+            if field_name in values:
+                exprs = values.pop(field_name)
+                is_default = False
+                assign_defaults = not values
+            elif assign_defaults:
+                exprs = DEFAULT_VALUES[field_name]
+                is_default = True
+            else:
+                exprs = '*'
+                is_default = True
+
             field_class = self.FIELDS_MAP[field_name]
-            field = field_class(field_name, exprs)
+            field = field_class(field_name, exprs, is_default)
             self.fields.append(field)
 
     def _increment_field_value(self, dateval, fieldnum):
@@ -86,6 +100,8 @@ class CronTrigger(object):
         return datetime(**values)
 
     def get_next_fire_time(self, start_date):
+        if self.start_date:
+            start_date = max(start_date, self.start_date)
         next_date = datetime_ceil(start_date)
         fieldnum = 0
         while 0 <= fieldnum < len(self.fields):
@@ -113,59 +129,14 @@ class CronTrigger(object):
         if fieldnum >= 0:
             return next_date
 
-    def __repr__(self):
-        field_reprs = ("%s='%s'" % (f.name, str(f)) for f in self.fields
-                       if str(f) != '*')
-        return '%s(%s)' % (self.__class__.__name__, ', '.join(field_reprs))
-
-
-class DateTrigger(object):
-    def __init__(self, run_date):
-        self.run_date = convert_to_datetime(run_date)
-
-    def get_next_fire_time(self, start_date):
-        if self.run_date >= start_date:
-            return self.run_date
+    def __str__(self):
+        options = ["%s='%s'" % (f.name, str(f)) for f in self.fields
+                   if not f.is_default]
+        return 'cron[%s]' % (', '.join(options))
 
     def __repr__(self):
-        return '%s(%s)' % (self.__class__.__name__, repr(self.run_date))
-
-
-class IntervalTrigger(object):
-    def __init__(self, interval, repeat, start_date=None):
-        if not isinstance(interval, timedelta):
-            raise TypeError('interval must be a timedelta')
-        if repeat < 0:
-            raise ValueError('Illegal value for repeat; expected >= 0, '
-                             'received %s' % repeat)
-
-        self.interval = interval
-        self.interval_length = timedelta_seconds(self.interval)
-        if self.interval_length == 0:
-            self.interval = timedelta(seconds=1)
-            self.interval_length = 1
-        self.repeat = repeat
-        if start_date is None:
-            self.first_fire_date = datetime.now() + self.interval
-        else:
-            self.first_fire_date = convert_to_datetime(start_date)
-        self.first_fire_date -= timedelta(microseconds=\
-                                          self.first_fire_date.microsecond)
-        if repeat > 0:
-            self.last_fire_date = self.first_fire_date + interval * (repeat - 1)
-        else:
-            self.last_fire_date = None
-
-    def get_next_fire_time(self, start_date):
-        if start_date < self.first_fire_date:
-            return self.first_fire_date
-        if self.last_fire_date and start_date > self.last_fire_date:
-            return None
-        timediff_seconds = timedelta_seconds(start_date - self.first_fire_date)
-        next_interval_num = int(ceil(timediff_seconds / self.interval_length))
-        return self.first_fire_date + self.interval * next_interval_num
-
-    def __repr__(self):
-        return "%s(interval=%s, repeat=%d, start_date=%s)" % (
-            self.__class__.__name__, repr(self.interval), self.repeat,
-            repr(self.first_fire_date))
+        options = ["%s='%s'" % (f.name, str(f)) for f in self.fields
+                   if not f.is_default]
+        if self.start_date:
+            options.append("start_date='%s'" % self.start_date.isoformat(' '))
+        return '<%s (%s)>' % (self.__class__.__name__, ', '.join(options))

libs/apscheduler/triggers/cron/expressions.py

@@ -1,6 +1,7 @@
 """
 This module contains the expressions applicable for CronTrigger's fields.
 """
+
 from calendar import monthrange
 import re
 
@@ -9,6 +10,7 @@ from apscheduler.util import asint
 __all__ = ('AllExpression', 'RangeExpression', 'WeekdayRangeExpression',
            'WeekdayPositionExpression')
 
+
 WEEKDAYS = ['mon', 'tue', 'wed', 'thu', 'fri', 'sat', 'sun']
 
 
@@ -64,7 +66,7 @@ class RangeExpression(AllExpression):
         start = field.get_value(date)
         minval = field.get_min(date)
         maxval = field.get_max(date)
-        
+
         # Apply range limits
         minval = max(minval, self.first)
         if self.last is not None:
@@ -85,7 +87,7 @@ class RangeExpression(AllExpression):
             range = '%d-%d' % (self.first, self.last)
         else:
             range = str(self.first)
-        
+
         if self.step:
             return '%s/%d' % (range, self.step)
         return range

libs/apscheduler/triggers/cron/fields.py

@@ -1,24 +1,31 @@
 """
-Fields represent :class:`~apscheduler.triggers.CronTrigger` options which map
-to :class:`~datetime.datetime` fields.
+Fields represent CronTrigger options which map to :class:`~datetime.datetime`
+fields.
 """
+
 from calendar import monthrange
 
-from apscheduler.expressions import *
+from apscheduler.triggers.cron.expressions import *
+
+__all__ = ('MIN_VALUES', 'MAX_VALUES', 'DEFAULT_VALUES', 'BaseField',
+           'WeekField', 'DayOfMonthField', 'DayOfWeekField')
 
-__all__ = ('BaseField', 'WeekField', 'DayOfMonthField', 'DayOfWeekField')
 
 MIN_VALUES = {'year': 1970, 'month': 1, 'day': 1, 'week': 1,
               'day_of_week': 0, 'hour': 0, 'minute': 0, 'second': 0}
 MAX_VALUES = {'year': 2 ** 63, 'month': 12, 'day:': 31, 'week': 53,
               'day_of_week': 6, 'hour': 23, 'minute': 59, 'second': 59}
+DEFAULT_VALUES = {'year': '*', 'month': 1, 'day': 1, 'week': '*',
+                  'day_of_week': '*', 'hour': 0, 'minute': 0, 'second': 0}
+
 
 class BaseField(object):
     REAL = True
     COMPILERS = [AllExpression, RangeExpression]
 
-    def __init__(self, name, exprs):
+    def __init__(self, name, exprs, is_default=False):
         self.name = name
+        self.is_default = is_default
         self.compile_expressions(exprs)
 
     def get_min(self, dateval):

libs/apscheduler/triggers/interval.py

@@ -0,0 +1,39 @@
+from datetime import datetime, timedelta
+from math import ceil
+
+from apscheduler.util import convert_to_datetime, timedelta_seconds
+
+
+class IntervalTrigger(object):
+    def __init__(self, interval, start_date=None):
+        if not isinstance(interval, timedelta):
+            raise TypeError('interval must be a timedelta')
+        if start_date:
+            start_date = convert_to_datetime(start_date)
+
+        self.interval = interval
+        self.interval_length = timedelta_seconds(self.interval)
+        if self.interval_length == 0:
+            self.interval = timedelta(seconds=1)
+            self.interval_length = 1
+
+        if start_date is None:
+            self.start_date = datetime.now() + self.interval
+        else:
+            self.start_date = convert_to_datetime(start_date)
+
+    def get_next_fire_time(self, start_date):
+        if start_date < self.start_date:
+            return self.start_date
+
+        timediff_seconds = timedelta_seconds(start_date - self.start_date)
+        next_interval_num = int(ceil(timediff_seconds / self.interval_length))
+        return self.start_date + self.interval * next_interval_num
+
+    def __str__(self):
+        return 'interval[%s]' % str(self.interval)
+
+    def __repr__(self):
+        return "<%s (interval=%s, start_date=%s)>" % (
+            self.__class__.__name__, repr(self.interval),
+            repr(self.start_date))

libs/apscheduler/triggers/simple.py

@@ -0,0 +1,17 @@
+from apscheduler.util import convert_to_datetime
+
+
+class SimpleTrigger(object):
+    def __init__(self, run_date):
+        self.run_date = convert_to_datetime(run_date)
+
+    def get_next_fire_time(self, start_date):
+        if self.run_date >= start_date:
+            return self.run_date
+
+    def __str__(self):
+        return 'date[%s]' % str(self.run_date)
+
+    def __repr__(self):
+        return '<%s (run_date=%s)>' % (
+            self.__class__.__name__, repr(self.run_date))

libs/apscheduler/util.py

@@ -4,9 +4,14 @@ This module contains several handy functions primarily meant for internal use.
 
 from datetime import date, datetime, timedelta
 from time import mktime
+import re
+import sys
+from types import MethodType
 
 __all__ = ('asint', 'asbool', 'convert_to_datetime', 'timedelta_seconds',
-           'time_difference', 'datetime_ceil')
+           'time_difference', 'datetime_ceil', 'combine_opts',
+           'get_callable_name', 'obj_to_ref', 'ref_to_obj', 'maybe_ref',
+           'to_unicode', 'iteritems', 'itervalues', 'xrange')
 
 
 def asint(text):
@@ -37,19 +42,36 @@ def asbool(obj):
     return bool(obj)
 
 
-def convert_to_datetime(dateval):
-    """
-    Converts a date object to a datetime object.
-    If an actual datetime object is passed, it is returned unmodified.
+_DATE_REGEX = re.compile(
+    r'(?P<year>\d{4})-(?P<month>\d{1,2})-(?P<day>\d{1,2})'
+    r'(?: (?P<hour>\d{1,2}):(?P<minute>\d{1,2}):(?P<second>\d{1,2})'
+    r'(?:\.(?P<microsecond>\d{1,6}))?)?')
+
+
+def convert_to_datetime(input):
+    """
+    Converts the given object to a datetime object, if possible.
+    If an actual datetime object is passed, it is returned unmodified.
+    If the input is a string, it is parsed as a datetime.
+
+    Date strings are accepted in three different forms: date only (Y-m-d),
+    date with time (Y-m-d H:M:S) or with date+time with microseconds
+    (Y-m-d H:M:S.micro).
 
-    :type dateval: date
     :rtype: datetime
     """
-    if isinstance(dateval, datetime):
-        return dateval
-    elif isinstance(dateval, date):
-        return datetime.fromordinal(dateval.toordinal())
-    raise TypeError('Expected date, got %s instead' % type(dateval))
+    if isinstance(input, datetime):
+        return input
+    elif isinstance(input, date):
+        return datetime.fromordinal(input.toordinal())
+    elif isinstance(input, str):
+        m = _DATE_REGEX.match(input)
+        if not m:
+            raise ValueError('Invalid date string')
+        values = [(k, int(v or 0)) for k, v in m.groupdict().items()]
+        values = dict(values)
+        return datetime(**values)
+    raise TypeError('Unsupported input type: %s' % type(input))
 
 
 def timedelta_seconds(delta):
@@ -74,9 +96,9 @@ def time_difference(date1, date2):
     :type date2: datetime
     :rtype: float
     """
-    later = mktime(date1.timetuple())
-    earlier = mktime(date2.timetuple())
-    return int(later - earlier)
+    later = mktime(date1.timetuple()) + date1.microsecond / 1000000.0
+    earlier = mktime(date2.timetuple()) + date2.microsecond / 1000000.0
+    return later - earlier
 
 
 def datetime_ceil(dateval):
@@ -87,5 +109,122 @@ def datetime_ceil(dateval):
     """
     if dateval.microsecond > 0:
         return dateval + timedelta(seconds=1,
-                                   microseconds=-dateval.microsecond)
+                                   microseconds= -dateval.microsecond)
     return dateval
+
+
+def combine_opts(global_config, prefix, local_config={}):
+    """
+    Returns a subdictionary from keys and values of  ``global_config`` where
+    the key starts with the given prefix, combined with options from
+    local_config. The keys in the subdictionary have the prefix removed.
+
+    :type global_config: dict
+    :type prefix: str
+    :type local_config: dict
+    :rtype: dict
+    """
+    prefixlen = len(prefix)
+    subconf = {}
+    for key, value in global_config.items():
+        if key.startswith(prefix):
+            key = key[prefixlen:]
+            subconf[key] = value
+    subconf.update(local_config)
+    return subconf
+
+
+def get_callable_name(func):
+    """
+    Returns the best available display name for the given function/callable.
+    """
+    f_self = getattr(func, '__self__', None) or getattr(func, 'im_self', None)
+
+    if f_self and hasattr(func, '__name__'):
+        if isinstance(f_self, type):
+            # class method
+            return '%s.%s' % (f_self.__name__, func.__name__)
+        # bound method
+        return '%s.%s' % (f_self.__class__.__name__, func.__name__)
+
+    if hasattr(func, '__call__'):
+        if hasattr(func, '__name__'):
+            # function, unbound method or a class with a __call__ method
+            return func.__name__
+        # instance of a class with a __call__ method
+        return func.__class__.__name__
+
+    raise TypeError('Unable to determine a name for %s -- '
+                    'maybe it is not a callable?' % repr(func))
+
+
+def obj_to_ref(obj):
+    """
+    Returns the path to the given object.
+    """
+    ref = '%s:%s' % (obj.__module__, get_callable_name(obj))
+    try:
+        obj2 = ref_to_obj(ref)
+        if obj != obj2:
+            raise ValueError
+    except Exception:
+        raise ValueError('Cannot determine the reference to %s' % repr(obj))
+    
+    return ref
+
+
+def ref_to_obj(ref):
+    """
+    Returns the object pointed to by ``ref``.
+    """
+    if not isinstance(ref, basestring):
+        raise TypeError('References must be strings')
+    if not ':' in ref:
+        raise ValueError('Invalid reference')
+
+    modulename, rest = ref.split(':', 1)
+    try:
+        obj = __import__(modulename)
+    except ImportError:
+        raise LookupError('Error resolving reference %s: '
+                          'could not import module' % ref)
+
+    try:
+        for name in modulename.split('.')[1:] + rest.split('.'):
+            obj = getattr(obj, name)
+        return obj
+    except Exception:
+        raise LookupError('Error resolving reference %s: '
+                          'error looking up object' % ref)
+
+
+def maybe_ref(ref):
+    """
+    Returns the object that the given reference points to, if it is indeed
+    a reference. If it is not a reference, the object is returned as-is.
+    """
+    if not isinstance(ref, str):
+        return ref
+    return ref_to_obj(ref)
+
+
+def to_unicode(string, encoding='ascii'):
+    """
+    Safely converts a string to a unicode representation on any
+    Python version.
+    """
+    if hasattr(string, 'decode'):
+        return string.decode(encoding, 'ignore')
+    return string  # pragma: nocover
+
+
+if sys.version_info < (3, 0):  # pragma: nocover
+    iteritems = lambda d: d.iteritems()
+    itervalues = lambda d: d.itervalues()
+    xrange = xrange
+    basestring = basestring
+else:  # pragma: nocover
+    iteritems = lambda d: d.items()
+    itervalues = lambda d: d.values()
+    xrange = range
+    basestring = str