updated branch to latest

.gitignore

@@ -10,6 +10,3 @@
 .tox
 .vagrant
 Vagrantfile
-
-# PyCharm
-.idea

CHANGES.md

@@ -1,3 +1,25 @@
+### 0.5.0
+(Jan 30th, 2015)
+
+- RQ workers can now be paused and resumed using `rq suspend` and
+  `rq resume` commands. Thanks Jonathan Tushman!
+- Jobs that are being performed are now stored in `StartedJobRegistry`
+  for monitoring purposes. This also prevents currently active jobs from
+  being orphaned/lost in the case of hard shutdowns.
+- You can now monitor finished jobs by checking `FinishedJobRegistry`.
+  Thanks Nic Cope for helping!
+- Jobs with unmet dependencies are now created with `deferred` as their
+  status. You can monitor deferred jobs by checking `DeferredJobRegistry`.
+- It is now possible to enqueue a job at the beginning of queue using
+  `queue.enqueue(func, at_front=True)`. Thanks Travis Johnson!
+- Command line scripts have all been refactored to use `click`. Thanks Lyon Zhang!
+- Added a new `SimpleWorker` that does not fork when executing jobs.
+  Useful for testing purposes. Thanks Cal Leeming!
+- Added `--queue-class` and `--job-class` arguments to `rqworker` script.
+  Thanks David Bonner!
+- Many other minor bug fixes and enhancements.
+
+
 ### 0.4.6
 (May 21st, 2014)
 

README.md

@@ -33,7 +33,7 @@ def count_words_at_url(url):
 
 You do use the excellent [requests][r] package, don't you?
 
-Then, create a RQ queue:
+Then, create an RQ queue:
 
 ```python
 from rq import Queue, use_connection

requirements.txt

@@ -1,2 +1,2 @@
-redis
+redis==2.7.0
-click
+click>=3.0.0

rq/cli/cli.py

@@ -16,6 +16,7 @@ from rq import Connection, get_failed_queue, Queue
 from rq.contrib.legacy import cleanup_ghosts
 from rq.exceptions import InvalidJobOperationError
 from rq.utils import import_attribute
+from rq.suspension import suspend as connection_suspend, resume as connection_resume, is_suspended
 
 from .helpers import (read_config_file, refresh, setup_loghandlers_from_args,
                       show_both, show_queues, show_workers)
@@ -24,8 +25,12 @@ from .helpers import (read_config_file, refresh, setup_loghandlers_from_args,
 url_option = click.option('--url', '-u', envvar='RQ_REDIS_URL',
                           help='URL describing Redis connection details.')
 
+config_option = click.option('--config', '-c', help='Module containing RQ settings.')
 
-def connect(url):
+
+def connect(url, config=None):
+    settings = read_config_file(config) if config else {}
+    url = url or settings.get('REDIS_URL')
     return StrictRedis.from_url(url or 'redis://localhost:6379/0')
 
 
@@ -120,7 +125,7 @@ def info(url, path, interval, raw, only_queues, only_workers, by_queue, queues):
 
 @main.command()
 @url_option
-@click.option('--config', '-c', help='Module containing RQ settings.')
+@config_option
 @click.option('--burst', '-b', is_flag=True, help='Run in burst mode (quit after all work is done)')
 @click.option('--name', '-n', help='Specify a different name')
 @click.option('--worker-class', '-w', default='rq.Worker', help='RQ Worker class to use')
@@ -158,7 +163,12 @@ def worker(url, config, burst, name, worker_class, job_class, queue_class, path,
     worker_class = import_attribute(worker_class)
     queue_class = import_attribute(queue_class)
 
+    if is_suspended(conn):
+        click.secho('RQ is currently suspended, to resume job execution run "rq resume"', fg='red')
+        sys.exit(1)
+
     try:
+
         queues = [queue_class(queue, connection=conn) for queue in queues]
         w = worker_class(queues,
                          name=name,
@@ -178,3 +188,34 @@ def worker(url, config, burst, name, worker_class, job_class, queue_class, path,
     except ConnectionError as e:
         print(e)
         sys.exit(1)
+
+
+@main.command()
+@url_option
+@config_option
+@click.option('--duration', help='Seconds you want the workers to be suspended.  Default is forever.', type=int)
+def suspend(url, config, duration):
+    """Suspends all workers, to resume run `rq resume`"""
+    if duration is not None and duration < 1:
+        click.echo("Duration must be an integer greater than 1")
+        sys.exit(1)
+
+    connection = connect(url, config)
+    connection_suspend(connection, duration)
+
+    if duration:
+        msg = """Suspending workers for {0} seconds.  No new jobs will be started during that time, but then will
+        automatically resume""".format(duration)
+        click.echo(msg)
+    else:
+        click.echo("Suspending workers.  No new jobs will be started.  But current jobs will be completed")
+
+
+@main.command()
+@url_option
+@config_option
+def resume(url, config):
+    """Resumes processing of queues, that where suspended with `rq suspend`"""
+    connection = connect(url, config)
+    connection_resume(connection)
+    click.echo("Resuming workers.")

rq/cli/helpers.py

@@ -9,6 +9,7 @@ from functools import partial
 import click
 from rq import Queue, Worker
 from rq.logutils import setup_loghandlers
+from rq.worker import WorkerStatus
 
 red = partial(click.style, fg='red')
 green = partial(click.style, fg='green')
@@ -39,8 +40,9 @@ def get_scale(x):
 
 def state_symbol(state):
     symbols = {
-        'busy': red('busy'),
+        WorkerStatus.BUSY: red('busy'),
-        'idle': green('idle'),
+        WorkerStatus.IDLE: green('idle'),
+        WorkerStatus.SUSPENDED: yellow('suspended'),
     }
     try:
         return symbols[state]

rq/job.py

@@ -12,7 +12,7 @@ from rq.compat import as_text, decode_redis_hash, string_types, text_type
 from .connections import resolve_connection
 from .exceptions import NoSuchJobError, UnpickleError
 from .local import LocalStack
-from .utils import import_attribute, utcformat, utcnow, utcparse
+from .utils import enum, import_attribute, utcformat, utcnow, utcparse
 
 try:
     import cPickle as pickle
@@ -25,18 +25,14 @@ dumps = partial(pickle.dumps, protocol=pickle.HIGHEST_PROTOCOL)
 loads = pickle.loads
 
 
-def enum(name, *sequential, **named):
+JobStatus = enum(
-    values = dict(zip(sequential, range(len(sequential))), **named)
+    'JobStatus',
-
+    QUEUED='queued',
-    # NOTE: Yes, we *really* want to cast using str() here.
+    FINISHED='finished',
-    # On Python 2 type() requires a byte string (which is str() on Python 2).
+    FAILED='failed',
-    # On Python 3 it does not matter, so we'll use str(), which acts as
+    STARTED='started',
-    # a no-op.
+    DEFERRED='deferred'
-    return type(str(name), (), values)
+)
-
-Status = enum('Status',
-              QUEUED='queued', FINISHED='finished', FAILED='failed',
-              STARTED='started')
 
 # Sentinel value to mark that some of our lazily evaluated properties have not
 # yet been evaluated.
@@ -92,8 +88,8 @@ class Job(object):
     # Job construction
     @classmethod
     def create(cls, func, args=None, kwargs=None, connection=None,
-               result_ttl=None, ttl=None, status=None, description=None, depends_on=None, timeout=None,
+               result_ttl=None, ttl=None, status=None, description=None,
-               id=None):
+               depends_on=None, timeout=None, id=None, origin=None):
         """Creates a new Job instance for the given function, arguments, and
         keyword arguments.
         """
@@ -111,6 +107,9 @@ class Job(object):
         if id is not None:
             job.set_id(id)
 
+        if origin is not None:
+            job.origin = origin
+
         # Set the core job tuple properties
         job._instance = None
         if inspect.ismethod(func):
@@ -167,19 +166,19 @@ class Job(object):
 
     @property
     def is_finished(self):
-        return self.get_status() == Status.FINISHED
+        return self.get_status() == JobStatus.FINISHED
 
     @property
     def is_queued(self):
-        return self.get_status() == Status.QUEUED
+        return self.get_status() == JobStatus.QUEUED
 
     @property
     def is_failed(self):
-        return self.get_status() == Status.FAILED
+        return self.get_status() == JobStatus.FAILED
 
     @property
     def is_started(self):
-        return self.get_status() == Status.STARTED
+        return self.get_status() == JobStatus.STARTED
 
     @property
     def dependency(self):
@@ -545,8 +544,14 @@ class Job(object):
 
             rq:job:job_id:dependents = {'job_id_1', 'job_id_2'}
 
-        This method adds the current job in its dependency's dependents set.
+        This method adds the job in its dependency's dependents set
+        and adds the job to DeferredJobRegistry.
         """
+        from .registry import DeferredJobRegistry
+
+        registry = DeferredJobRegistry(self.origin, connection=self.connection)
+        registry.add(self, pipeline=pipeline)
+
         connection = pipeline if pipeline is not None else self.connection
         connection.sadd(Job.dependents_key_for(self._dependency_id), self.id)
 

rq/queue.py

@@ -4,15 +4,14 @@ from __future__ import (absolute_import, division, print_function,
 
 import uuid
 
-from .connections import resolve_connection
+from redis import WatchError
-from .job import Job, Status
-from .utils import import_attribute, utcnow
 
+from .compat import as_text, string_types, total_ordering
+from .connections import resolve_connection
 from .exceptions import (DequeueTimeout, InvalidJobOperationError,
                          NoSuchJobError, UnpickleError)
-from .compat import total_ordering, string_types, as_text
+from .job import Job, JobStatus
-
+from .utils import import_attribute, utcnow
-from redis import WatchError
 
 
 def get_failed_queue(connection=None):
@@ -149,7 +148,7 @@ class Queue(object):
 
     def compact(self):
         """Removes all "dead" jobs from the queue by cycling through it, while
-        guarantueeing FIFO semantics.
+        guaranteeing FIFO semantics.
         """
         COMPACT_QUEUE = 'rq:queue:_compact:{0}'.format(uuid.uuid4())
 
@@ -161,14 +160,18 @@ class Queue(object):
             if self.job_class.exists(job_id, self.connection):
                 self.connection.rpush(self.key, job_id)
 
-    def push_job_id(self, job_id, pipeline=None):
+    def push_job_id(self, job_id, pipeline=None, at_front=False):
-        """Pushes a job ID on the corresponding Redis queue."""
+        """Pushes a job ID on the corresponding Redis queue.
+        'at_front' allows you to push the job onto the front instead of the back of the queue"""
         connection = pipeline if pipeline is not None else self.connection
-        connection.rpush(self.key, job_id)
+        if at_front:
+            connection.lpush(self.key, job_id)
+        else:
+            connection.rpush(self.key, job_id)
 
     def enqueue_call(self, func, args=None, kwargs=None, timeout=None,
                      result_ttl=None, ttl=None, description=None,
-                     depends_on=None, job_id=None):
+                     depends_on=None, job_id=None, at_front=False):
         """Creates a job to represent the delayed function call and enqueues
         it.
 
@@ -178,11 +181,11 @@ class Queue(object):
         """
         timeout = timeout or self._default_timeout
 
-        # TODO: job with dependency shouldn't have "queued" as status
+        job = self.job_class.create(
-        job = self.job_class.create(func, args, kwargs, connection=self.connection,
+            func, args, kwargs, connection=self.connection,
-                                    result_ttl=result_ttl, ttl=ttl, status=Status.QUEUED,
+            result_ttl=result_ttl, status=JobStatus.QUEUED,
-                                    description=description, depends_on=depends_on, timeout=timeout,
+            description=description, depends_on=depends_on,
-                                    id=job_id)
+            timeout=timeout, id=job_id, origin=self.name)
 
         # If job depends on an unfinished job, register itself on it's
         # parent's dependents instead of enqueueing it.
@@ -195,7 +198,8 @@ class Queue(object):
                 while True:
                     try:
                         pipe.watch(depends_on.key)
-                        if depends_on.get_status() != Status.FINISHED:
+                        if depends_on.get_status() != JobStatus.FINISHED:
+                            job.set_status(JobStatus.DEFERRED)
                             job.register_dependency(pipeline=pipe)
                             job.save(pipeline=pipe)
                             pipe.execute()
@@ -204,7 +208,7 @@ class Queue(object):
                     except WatchError:
                         continue
 
-        return self.enqueue_job(job)
+        return self.enqueue_job(job, at_front=at_front)
 
     def enqueue(self, f, *args, **kwargs):
         """Creates a job to represent the delayed function call and enqueues
@@ -232,6 +236,7 @@ class Queue(object):
         ttl = kwargs.pop('ttl', None)
         depends_on = kwargs.pop('depends_on', None)
         job_id = kwargs.pop('job_id', None)
+        at_front = kwargs.pop('at_front', False)
 
         if 'args' in kwargs or 'kwargs' in kwargs:
             assert args == (), 'Extra positional arguments cannot be used when using explicit args and kwargs.'  # noqa
@@ -241,29 +246,29 @@ class Queue(object):
         return self.enqueue_call(func=f, args=args, kwargs=kwargs,
                                  timeout=timeout, result_ttl=result_ttl, ttl=ttl,
                                  description=description, depends_on=depends_on,
-                                 job_id=job_id)
+                                 job_id=job_id, at_front=at_front)
 
-    def enqueue_job(self, job, set_meta_data=True):
+    def enqueue_job(self, job, at_front=False):
         """Enqueues a job for delayed execution.
 
-        If the `set_meta_data` argument is `True` (default), it will update
-        the properties `origin` and `enqueued_at`.
-
         If Queue is instantiated with async=False, job is executed immediately.
         """
-        # Add Queue key set
+        with self.connection._pipeline() as pipeline:
-        self.connection.sadd(self.redis_queues_keys, self.key)
+            # Add Queue key set
+            self.connection.sadd(self.redis_queues_keys, self.key)
+            job.set_status(JobStatus.QUEUED, pipeline=pipeline)
 
-        if set_meta_data:
             job.origin = self.name
             job.enqueued_at = utcnow()
 
-        if job.timeout is None:
+            if job.timeout is None:
-            job.timeout = self.DEFAULT_TIMEOUT
+                job.timeout = self.DEFAULT_TIMEOUT
-        job.save()
+            job.save(pipeline=pipeline)
+
+            pipeline.execute()
 
         if self._async:
-            self.push_job_id(job.id)
+            self.push_job_id(job.id, at_front=at_front)
         else:
             job.perform()
             job.save()
@@ -272,11 +277,16 @@ class Queue(object):
     def enqueue_dependents(self, job):
         """Enqueues all jobs in the given job's dependents set and clears it."""
         # TODO: can probably be pipelined
+        from .registry import DeferredJobRegistry
+
+        registry = DeferredJobRegistry(self.name, self.connection)
+
         while True:
             job_id = as_text(self.connection.spop(job.dependents_key))
             if job_id is None:
                 break
             dependent = self.job_class.fetch(job_id, connection=self.connection)
+            registry.remove(dependent)
             self.enqueue_job(dependent)
 
     def pop_job_id(self):
@@ -391,19 +401,25 @@ class Queue(object):
 
 class FailedQueue(Queue):
     def __init__(self, connection=None):
-        super(FailedQueue, self).__init__(Status.FAILED, connection=connection)
+        super(FailedQueue, self).__init__(JobStatus.FAILED, connection=connection)
 
     def quarantine(self, job, exc_info):
         """Puts the given Job in quarantine (i.e. put it on the failed
         queue).
-
-        This is different from normal job enqueueing, since certain meta data
-        must not be overridden (e.g. `origin` or `enqueued_at`) and other meta
-        data must be inserted (`ended_at` and `exc_info`).
         """
-        job.ended_at = utcnow()
+
-        job.exc_info = exc_info
+        with self.connection._pipeline() as pipeline:
-        return self.enqueue_job(job, set_meta_data=False)
+            # Add Queue key set
+            self.connection.sadd(self.redis_queues_keys, self.key)
+
+            job.ended_at = utcnow()
+            job.exc_info = exc_info
+            job.save(pipeline=pipeline)
+
+            self.push_job_id(job.id, pipeline=pipeline)
+            pipeline.execute()
+
+        return job
 
     def requeue(self, job_id):
         """Requeues the job with the given job ID."""
@@ -418,7 +434,7 @@ class FailedQueue(Queue):
         if self.remove(job) == 0:
             raise InvalidJobOperationError('Cannot requeue non-failed jobs.')
 
-        job.set_status(Status.QUEUED)
+        job.set_status(JobStatus.QUEUED)
         job.exc_info = None
         q = Queue(job.origin, connection=self.connection)
         q.enqueue_job(job)

rq/registry.py

@@ -24,7 +24,7 @@ class BaseRegistry(object):
         self.cleanup()
         return self.connection.zcard(self.key)
 
-    def add(self, job, ttl, pipeline=None):
+    def add(self, job, ttl=0, pipeline=None):
         """Adds a job to a registry with expiry time of now + ttl."""
         score = ttl if ttl < 0 else current_timestamp() + ttl
         if pipeline is not None:
@@ -108,3 +108,19 @@ class FinishedJobRegistry(BaseRegistry):
         """
         score = timestamp if timestamp is not None else current_timestamp()
         self.connection.zremrangebyscore(self.key, 0, score)
+
+
+class DeferredJobRegistry(BaseRegistry):
+    """
+    Registry of deferred jobs (waiting for another job to finish).
+    """
+
+    def __init__(self, name='default', connection=None):
+        super(DeferredJobRegistry, self).__init__(name, connection)
+        self.key = 'rq:deferred:%s' % name
+
+    def cleanup(self):
+        """This method is only here to prevent errors because this method is
+        automatically called by `count()` and `get_job_ids()` methods
+        implemented in BaseRegistry."""
+        pass

rq/suspension.py

@@ -0,0 +1,18 @@
+WORKERS_SUSPENDED = 'rq:suspended'
+
+
+def is_suspended(connection):
+    return connection.exists(WORKERS_SUSPENDED)
+
+
+def suspend(connection, ttl=None):
+    """ttl = time to live in seconds.  Default is no expiration
+       Note:  If you pass in 0 it will invalidate right away
+    """
+    connection.set(WORKERS_SUSPENDED, 1)
+    if ttl is not None:
+        connection.expire(WORKERS_SUSPENDED, ttl)
+
+
+def resume(connection):
+    return connection.delete(WORKERS_SUSPENDED)

rq/utils.py

@@ -9,12 +9,12 @@ from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
 
 import calendar
-import importlib
 import datetime
+import importlib
 import logging
 import sys
 
-from .compat import is_python_version, as_text
+from .compat import as_text, is_python_version
 
 
 class _Colorizer(object):
@@ -208,3 +208,13 @@ def first(iterable, default=None, key=None):
 def current_timestamp():
     """Returns current UTC timestamp"""
     return calendar.timegm(datetime.datetime.utcnow().utctimetuple())
+
+
+def enum(name, *sequential, **named):
+    values = dict(zip(sequential, range(len(sequential))), **named)
+
+    # NOTE: Yes, we *really* want to cast using str() here.
+    # On Python 2 type() requires a byte string (which is str() on Python 2).
+    # On Python 3 it does not matter, so we'll use str(), which acts as
+    # a no-op.
+    return type(str(name), (), values)

rq/version.py

@@ -1,4 +1,5 @@
 # -*- coding: utf-8 -*-
 from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
-VERSION = '0.4.6'
+
+VERSION = '0.5.0'

rq/worker.py

@@ -17,13 +17,14 @@ from rq.compat import as_text, string_types, text_type
 
 from .connections import get_current_connection
 from .exceptions import DequeueTimeout, NoQueueError
-from .job import Job, Status
+from .job import Job, JobStatus
 from .logutils import setup_loghandlers
 from .queue import get_failed_queue, Queue
+from .registry import FinishedJobRegistry, StartedJobRegistry
+from .suspension import is_suspended
 from .timeouts import UnixSignalDeathPenalty
-from .utils import import_attribute, make_colorizer, utcformat, utcnow, utcparse
+from .utils import enum, import_attribute, make_colorizer, utcformat, utcnow, utcparse
 from .version import VERSION
-from .registry import FinishedJobRegistry, StartedJobRegistry
 
 try:
     from procname import setprocname
@@ -65,6 +66,15 @@ def signal_name(signum):
         return 'SIG_UNKNOWN'
 
 
+WorkerStatus = enum(
+    'WorkerStatus',
+    STARTED='started',
+    SUSPENDED='suspended',
+    BUSY='busy',
+    IDLE='idle'
+)
+
+
 class Worker(object):
     redis_worker_namespace_prefix = 'rq:worker:'
     redis_workers_keys = 'rq:workers'
@@ -158,11 +168,11 @@ class Worker(object):
 
     def queue_names(self):
         """Returns the queue names of this worker's queues."""
-        return map(lambda q: q.name, self.queues)
+        return list(map(lambda q: q.name, self.queues))
 
     def queue_keys(self):
         """Returns the Redis keys representing this worker's queues."""
-        return map(lambda q: q.key, self.queues)
+        return list(map(lambda q: q.key, self.queues))
 
     @property
     def name(self):
@@ -348,6 +358,29 @@ class Worker(object):
         signal.signal(signal.SIGINT, request_stop)
         signal.signal(signal.SIGTERM, request_stop)
 
+    def check_for_suspension(self, burst):
+        """Check to see if workers have been suspended by `rq suspend`"""
+
+        before_state = None
+        notified = False
+
+        while not self.stopped and is_suspended(self.connection):
+
+            if burst:
+                self.log.info('Suspended in burst mode -- exiting.'
+                              'Note: There could still be unperformed jobs on the queue')
+                raise StopRequested
+
+            if not notified:
+                self.log.info('Worker suspended, use "rq resume" command to resume')
+                before_state = self.get_state()
+                self.set_state(WorkerStatus.SUSPENDED)
+                notified = True
+            time.sleep(1)
+
+        if before_state:
+            self.set_state(before_state)
+
     def work(self, burst=False):
         """Starts the work loop.
 
@@ -363,15 +396,19 @@ class Worker(object):
         did_perform_work = False
         self.register_birth()
         self.log.info('RQ worker started, version %s' % VERSION)
-        self.set_state('starting')
+        self.set_state(WorkerStatus.STARTED)
+
         try:
             while True:
-                if self.stopped:
-                    self.log.info('Stopping on request.')
-                    break
-
-                timeout = None if burst else max(1, self.default_worker_ttl - 60)
                 try:
+                    self.check_for_suspension(burst)
+
+                    if self.stopped:
+                        self.log.info('Stopping on request.')
+                        break
+
+                    timeout = None if burst else max(1, self.default_worker_ttl - 60)
+
                     result = self.dequeue_job_and_maintain_ttl(timeout)
                     if result is None:
                         break
@@ -382,10 +419,11 @@ class Worker(object):
                 self.execute_job(job)
                 self.heartbeat()
 
-                if job.get_status() == Status.FINISHED:
+                if job.get_status() == JobStatus.FINISHED:
                     queue.enqueue_dependents(job)
 
                 did_perform_work = True
+
         finally:
             if not self.is_horse:
                 self.register_death()
@@ -395,7 +433,7 @@ class Worker(object):
         result = None
         qnames = self.queue_names()
 
-        self.set_state('idle')
+        self.set_state(WorkerStatus.IDLE)
         self.procline('Listening on %s' % ','.join(qnames))
         self.log.info('')
         self.log.info('*** Listening on %s...' %
@@ -410,7 +448,7 @@ class Worker(object):
                 if result is not None:
                     job, queue = result
                     self.log.info('%s: %s (%s)' % (green(queue.name),
-                                  blue(job.description), job.id))
+                                                   blue(job.description), job.id))
 
                 break
             except DequeueTimeout:
@@ -450,7 +488,9 @@ class Worker(object):
             self.procline('Forked %d at %d' % (child_pid, time.time()))
             while True:
                 try:
+                    self.set_state('busy')
                     os.waitpid(child_pid, 0)
+                    self.set_state('idle')
                     break
                 except OSError as e:
                     # In case we encountered an OSError due to EINTR (which is
@@ -492,12 +532,12 @@ class Worker(object):
         timeout = (job.timeout or 180) + 60
 
         with self.connection._pipeline() as pipeline:
-            self.set_state('busy', pipeline=pipeline)
+            self.set_state(WorkerStatus.BUSY, pipeline=pipeline)
             self.set_current_job_id(job.id, pipeline=pipeline)
             self.heartbeat(timeout, pipeline=pipeline)
             registry = StartedJobRegistry(job.origin, self.connection)
             registry.add(job, timeout, pipeline=pipeline)
-            job.set_status(Status.STARTED, pipeline=pipeline)
+            job.set_status(JobStatus.STARTED, pipeline=pipeline)
             pipeline.execute()
 
         self.procline('Processing %s from %s since %s' % (
@@ -526,7 +566,7 @@ class Worker(object):
                 result_ttl = job.get_result_ttl(self.default_result_ttl)
                 if result_ttl != 0:
                     job.ended_at = utcnow()
-                    job._status = Status.FINISHED
+                    job._status = JobStatus.FINISHED
                     job.save(pipeline=pipeline)
 
                     finished_job_registry = FinishedJobRegistry(job.origin, self.connection)
@@ -538,7 +578,7 @@ class Worker(object):
                 pipeline.execute()
 
             except Exception:
-                job.set_status(Status.FAILED, pipeline=pipeline)
+                job.set_status(JobStatus.FAILED, pipeline=pipeline)
                 started_job_registry.remove(job, pipeline=pipeline)
                 pipeline.execute()
                 self.handle_exception(job, *sys.exc_info())
@@ -567,7 +607,7 @@ class Worker(object):
             'arguments': job.args,
             'kwargs': job.kwargs,
             'queue': job.origin,
-        })
+            })
 
         for handler in reversed(self._exc_handlers):
             self.log.debug('Invoking exception handler %s' % (handler,))

tests/test_cli.py

@@ -26,6 +26,17 @@ class TestCommandLine(TestCase):
 
 
 class TestRQCli(RQTestCase):
+
+    def assert_normal_execution(self, result):
+        if result.exit_code == 0:
+            return True
+        else:
+            print("Non normal execution")
+            print("Exit Code: {}".format(result.exit_code))
+            print("Output: {}".format(result.output))
+            print("Exception: {}".format(result.exception))
+            self.assertEqual(result.exit_code, 0)
+
     """Test rq_cli script"""
     def setUp(self):
         super(TestRQCli, self).setUp()
@@ -41,25 +52,52 @@ class TestRQCli(RQTestCase):
         """rq empty -u <url> failed"""
         runner = CliRunner()
         result = runner.invoke(main, ['empty', '-u', self.redis_url, 'failed'])
-        self.assertEqual(result.exit_code, 0)
+        self.assert_normal_execution(result)
         self.assertEqual(result.output.strip(), '1 jobs removed from failed queue')
 
     def test_requeue(self):
         """rq requeue -u <url> --all"""
         runner = CliRunner()
         result = runner.invoke(main, ['requeue', '-u', self.redis_url, '--all'])
-        self.assertEqual(result.exit_code, 0)
+        self.assert_normal_execution(result)
         self.assertEqual(result.output.strip(), 'Requeueing 1 jobs from failed queue')
 
     def test_info(self):
         """rq info -u <url>"""
         runner = CliRunner()
         result = runner.invoke(main, ['info', '-u', self.redis_url])
-        self.assertEqual(result.exit_code, 0)
+        self.assert_normal_execution(result)
         self.assertIn('1 queues, 1 jobs total', result.output)
 
     def test_worker(self):
         """rq worker -u <url> -b"""
         runner = CliRunner()
         result = runner.invoke(main, ['worker', '-u', self.redis_url, '-b'])
-        self.assertEqual(result.exit_code, 0)
+        self.assert_normal_execution(result)
+
+    def test_suspend_and_resume(self):
+        """rq suspend -u <url>
+           rq resume -u <url>
+        """
+        runner = CliRunner()
+        result = runner.invoke(main, ['suspend', '-u', self.redis_url])
+        self.assert_normal_execution(result)
+
+        result = runner.invoke(main, ['resume', '-u', self.redis_url])
+        self.assert_normal_execution(result)
+
+    def test_suspend_with_ttl(self):
+        """rq suspend -u <url> --duration=2
+        """
+        runner = CliRunner()
+        result = runner.invoke(main, ['suspend', '-u', self.redis_url, '--duration', 1])
+        self.assert_normal_execution(result)
+
+    def test_suspend_with_invalid_ttl(self):
+        """rq suspend -u <url> --duration=0
+        """
+        runner = CliRunner()
+        result = runner.invoke(main, ['suspend', '-u', self.redis_url, '--duration', 0])
+
+        self.assertEqual(result.exit_code, 1)
+        self.assertIn("Duration must be an integer greater than 1", result.output)

tests/test_job.py

@@ -4,17 +4,18 @@ from __future__ import (absolute_import, division, print_function,
 
 from datetime import datetime
 
+from tests import RQTestCase
+from tests.fixtures import (access_self, CallableObject, Number, say_hello,
+                            some_calculation)
+from tests.helpers import strip_microseconds
+
 from rq.compat import as_text, PY2
 from rq.exceptions import NoSuchJobError, UnpickleError
 from rq.job import get_current_job, Job
 from rq.queue import Queue
+from rq.registry import DeferredJobRegistry
 from rq.utils import utcformat
 
-from tests import RQTestCase
-from tests.fixtures import (access_self, CallableObject, Number, say_hello,
-                            some_calculation)
-from tests.helpers import strip_microseconds
-
 try:
     from cPickle import loads, dumps
 except ImportError:
@@ -331,12 +332,18 @@ class TestJob(RQTestCase):
         self.assertRaises(NoSuchJobError, Job.fetch, job.id, self.testconn)
 
     def test_register_dependency(self):
-        """Test that jobs updates the correct job dependents."""
+        """Ensure dependency registration works properly."""
-        job = Job.create(func=say_hello)
+        origin = 'some_queue'
+        registry = DeferredJobRegistry(origin, self.testconn)
+
+        job = Job.create(func=say_hello, origin=origin)
         job._dependency_id = 'id'
         job.save()
+
+        self.assertEqual(registry.get_job_ids(), [])
         job.register_dependency()
         self.assertEqual(as_text(self.testconn.spop('rq:job:id:dependents')), job.id)
+        self.assertEqual(registry.get_job_ids(), [job.id])
 
     def test_cancel(self):
         """job.cancel() deletes itself & dependents mapping from Redis."""

tests/test_queue.py

@@ -2,15 +2,16 @@
 from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
 
-from rq import get_failed_queue, Queue
-from rq.exceptions import InvalidJobOperationError
-from rq.job import Job, Status
-from rq.worker import Worker
-
 from tests import RQTestCase
 from tests.fixtures import (div_by_zero, echo, Number, say_hello,
                             some_calculation)
 
+from rq import get_failed_queue, Queue
+from rq.exceptions import InvalidJobOperationError
+from rq.job import Job, JobStatus
+from rq.registry import DeferredJobRegistry
+from rq.worker import Worker
+
 
 class CustomJob(Job):
     pass
@@ -117,6 +118,7 @@ class TestQueue(RQTestCase):
         # say_hello spec holds which queue this is sent to
         job = q.enqueue(say_hello, 'Nick', foo='bar')
         job_id = job.id
+        self.assertEqual(job.origin, q.name)
 
         # Inspect data inside Redis
         q_key = 'rq:queue:default'
@@ -131,14 +133,12 @@ class TestQueue(RQTestCase):
         job = Job.create(func=say_hello, args=('Nick',), kwargs=dict(foo='bar'))
 
         # Preconditions
-        self.assertIsNone(job.origin)
         self.assertIsNone(job.enqueued_at)
 
         # Action
         q.enqueue_job(job)
 
         # Postconditions
-        self.assertEquals(job.origin, q.name)
         self.assertIsNotNone(job.enqueued_at)
 
     def test_pop_job_id(self):
@@ -262,7 +262,7 @@ class TestQueue(RQTestCase):
         """Enqueueing a job sets its status to "queued"."""
         q = Queue()
         job = q.enqueue(say_hello)
-        self.assertEqual(job.get_status(), Status.QUEUED)
+        self.assertEqual(job.get_status(), JobStatus.QUEUED)
 
     def test_enqueue_explicit_args(self):
         """enqueue() works for both implicit/explicit args."""
@@ -320,37 +320,44 @@ class TestQueue(RQTestCase):
         self.assertEquals(len(Queue.all()), 3)
 
     def test_enqueue_dependents(self):
-        """Enqueueing the dependent jobs pushes all jobs in the depends set to the queue."""
+        """Enqueueing dependent jobs pushes all jobs in the depends set to the queue
+        and removes them from DeferredJobQueue."""
         q = Queue()
         parent_job = Job.create(func=say_hello)
         parent_job.save()
-        job_1 = Job.create(func=say_hello, depends_on=parent_job)
+        job_1 = q.enqueue(say_hello, depends_on=parent_job)
-        job_1.save()
+        job_2 = q.enqueue(say_hello, depends_on=parent_job)
-        job_1.register_dependency()
-        job_2 = Job.create(func=say_hello, depends_on=parent_job)
-        job_2.save()
-        job_2.register_dependency()
 
+        registry = DeferredJobRegistry(q.name, connection=self.testconn)
+        self.assertEqual(
+            set(registry.get_job_ids()),
+            set([job_1.id, job_2.id])
+        )
         # After dependents is enqueued, job_1 and job_2 should be in queue
         self.assertEqual(q.job_ids, [])
         q.enqueue_dependents(parent_job)
-        self.assertEqual(set(q.job_ids), set([job_1.id, job_2.id]))
+        self.assertEqual(set(q.job_ids), set([job_2.id, job_1.id]))
         self.assertFalse(self.testconn.exists(parent_job.dependents_key))
 
+        # DeferredJobRegistry should also be empty
+        self.assertEqual(registry.get_job_ids(), [])
+
     def test_enqueue_job_with_dependency(self):
         """Jobs are enqueued only when their dependencies are finished."""
         # Job with unfinished dependency is not immediately enqueued
         parent_job = Job.create(func=say_hello)
         q = Queue()
-        q.enqueue_call(say_hello, depends_on=parent_job)
+        job = q.enqueue_call(say_hello, depends_on=parent_job)
         self.assertEqual(q.job_ids, [])
+        self.assertEqual(job.get_status(), JobStatus.DEFERRED)
 
         # Jobs dependent on finished jobs are immediately enqueued
-        parent_job.set_status(Status.FINISHED)
+        parent_job.set_status(JobStatus.FINISHED)
         parent_job.save()
         job = q.enqueue_call(say_hello, depends_on=parent_job)
         self.assertEqual(q.job_ids, [job.id])
         self.assertEqual(job.timeout, Queue.DEFAULT_TIMEOUT)
+        self.assertEqual(job.get_status(), JobStatus.QUEUED)
 
     def test_enqueue_job_with_dependency_by_id(self):
         """Enqueueing jobs should work as expected by id as well as job-objects."""
@@ -361,14 +368,14 @@ class TestQueue(RQTestCase):
         self.assertEqual(q.job_ids, [])
 
         # Jobs dependent on finished jobs are immediately enqueued
-        parent_job.set_status(Status.FINISHED)
+        parent_job.set_status(JobStatus.FINISHED)
         parent_job.save()
         job = q.enqueue_call(say_hello, depends_on=parent_job.id)
         self.assertEqual(q.job_ids, [job.id])
         self.assertEqual(job.timeout, Queue.DEFAULT_TIMEOUT)
 
     def test_enqueue_job_with_dependency_and_timeout(self):
-        """Jobs still know their specified timeout after being scheduled as a dependency."""
+        """Jobs remember their timeout when enqueued as a dependency."""
         # Job with unfinished dependency is not immediately enqueued
         parent_job = Job.create(func=say_hello)
         q = Queue()
@@ -377,7 +384,7 @@ class TestQueue(RQTestCase):
         self.assertEqual(job.timeout, 123)
 
         # Jobs dependent on finished jobs are immediately enqueued
-        parent_job.set_status(Status.FINISHED)
+        parent_job.set_status(JobStatus.FINISHED)
         parent_job.save()
         job = q.enqueue_call(say_hello, depends_on=parent_job, timeout=123)
         self.assertEqual(q.job_ids, [job.id])
@@ -439,7 +446,7 @@ class TestFailedQueue(RQTestCase):
         get_failed_queue().requeue(job.id)
 
         job = Job.fetch(job.id)
-        self.assertEqual(job.get_status(), Status.QUEUED)
+        self.assertEqual(job.get_status(), JobStatus.QUEUED)
 
     def test_enqueue_preserves_result_ttl(self):
         """Enqueueing persists result_ttl."""
@@ -459,3 +466,13 @@ class TestFailedQueue(RQTestCase):
         """Ensure custom job class assignment works as expected."""
         q = Queue(job_class=CustomJob)
         self.assertEqual(q.job_class, CustomJob)
+
+    def test_skip_queue(self):
+        """Ensure the skip_queue option functions"""
+        q = Queue('foo')
+        job1 = q.enqueue(say_hello)
+        job2 = q.enqueue(say_hello)
+        assert q.dequeue() == job1
+        skip_job = q.enqueue(say_hello, at_front=True)
+        assert q.dequeue() == skip_job
+        assert q.dequeue() == job2

tests/test_registry.py

@@ -1,11 +1,13 @@
 # -*- coding: utf-8 -*-
 from __future__ import absolute_import
 
+from rq.compat import as_text
 from rq.job import Job
 from rq.queue import FailedQueue, Queue
 from rq.utils import current_timestamp
 from rq.worker import Worker
-from rq.registry import FinishedJobRegistry, StartedJobRegistry
+from rq.registry import (DeferredJobRegistry, FinishedJobRegistry,
+                         StartedJobRegistry)
 
 from tests import RQTestCase
 from tests.fixtures import div_by_zero, say_hello
@@ -119,7 +121,6 @@ class TestFinishedJobRegistry(RQTestCase):
         self.registry.cleanup(timestamp + 20)
         self.assertEqual(self.registry.get_job_ids(), ['baz'])
 
-
     def test_jobs_are_put_in_registry(self):
         """Completed jobs are added to FinishedJobRegistry."""
         self.assertEqual(self.registry.get_job_ids(), [])
@@ -135,3 +136,18 @@ class TestFinishedJobRegistry(RQTestCase):
         failed_job = queue.enqueue(div_by_zero)
         worker.perform_job(failed_job)
         self.assertEqual(self.registry.get_job_ids(), [job.id])
+
+
+class TestDeferredRegistry(RQTestCase):
+
+    def setUp(self):
+        super(TestDeferredRegistry, self).setUp()
+        self.registry = DeferredJobRegistry(connection=self.testconn)
+
+    def test_add(self):
+        """Adding a job to DeferredJobsRegistry."""
+        job = Job()
+        self.registry.add(job)
+        job_ids = [as_text(job_id) for job_id in
+                   self.testconn.zrange(self.registry.key, 0, -1)]
+        self.assertEqual(job_ids, [job.id])

tests/test_worker.py

@@ -3,17 +3,19 @@ from __future__ import (absolute_import, division, print_function,
                         unicode_literals)
 
 import os
-
+from time import sleep
-from rq import get_failed_queue, Queue, Worker, SimpleWorker
-from rq.compat import as_text
-from rq.job import Job, Status
-from rq.registry import StartedJobRegistry
 
 from tests import RQTestCase, slow
 from tests.fixtures import (create_file, create_file_after_timeout,
-                            div_by_zero, say_hello, say_pid)
+                            div_by_zero, do_nothing, say_hello, say_pid)
 from tests.helpers import strip_microseconds
 
+from rq import get_failed_queue, Queue, SimpleWorker, Worker
+from rq.compat import as_text
+from rq.job import Job, JobStatus
+from rq.registry import StartedJobRegistry
+from rq.suspension import resume, suspend
+
 
 class CustomJob(Job):
     pass
@@ -222,14 +224,14 @@ class TestWorker(RQTestCase):
         w = Worker([q])
 
         job = q.enqueue(say_hello)
-        self.assertEqual(job.get_status(), Status.QUEUED)
+        self.assertEqual(job.get_status(), JobStatus.QUEUED)
         self.assertEqual(job.is_queued, True)
         self.assertEqual(job.is_finished, False)
         self.assertEqual(job.is_failed, False)
 
         w.work(burst=True)
         job = Job.fetch(job.id)
-        self.assertEqual(job.get_status(), Status.FINISHED)
+        self.assertEqual(job.get_status(), JobStatus.FINISHED)
         self.assertEqual(job.is_queued, False)
         self.assertEqual(job.is_finished, True)
         self.assertEqual(job.is_failed, False)
@@ -238,7 +240,7 @@ class TestWorker(RQTestCase):
         job = q.enqueue(div_by_zero, args=(1,))
         w.work(burst=True)
         job = Job.fetch(job.id)
-        self.assertEqual(job.get_status(), Status.FAILED)
+        self.assertEqual(job.get_status(), JobStatus.FAILED)
         self.assertEqual(job.is_queued, False)
         self.assertEqual(job.is_finished, False)
         self.assertEqual(job.is_failed, True)
@@ -251,13 +253,13 @@ class TestWorker(RQTestCase):
         job = q.enqueue_call(say_hello, depends_on=parent_job)
         w.work(burst=True)
         job = Job.fetch(job.id)
-        self.assertEqual(job.get_status(), Status.FINISHED)
+        self.assertEqual(job.get_status(), JobStatus.FINISHED)
 
         parent_job = q.enqueue(div_by_zero)
         job = q.enqueue_call(say_hello, depends_on=parent_job)
         w.work(burst=True)
         job = Job.fetch(job.id)
-        self.assertNotEqual(job.get_status(), Status.FINISHED)
+        self.assertNotEqual(job.get_status(), JobStatus.FINISHED)
 
     def test_get_current_job(self):
         """Ensure worker.get_current_job() works properly"""
@@ -319,6 +321,56 @@ class TestWorker(RQTestCase):
         self.assertEquals(job.result, 'Hi there, Adam!')
         self.assertEquals(job.description, '你好 世界!')
 
+    def test_suspend_worker_execution(self):
+        """Test Pause Worker Execution"""
+
+        SENTINEL_FILE = '/tmp/rq-tests.txt'
+
+        try:
+            # Remove the sentinel if it is leftover from a previous test run
+            os.remove(SENTINEL_FILE)
+        except OSError as e:
+            if e.errno != 2:
+                raise
+
+        q = Queue()
+        q.enqueue(create_file, SENTINEL_FILE)
+
+        w = Worker([q])
+
+        suspend(self.testconn)
+
+        w.work(burst=True)
+        assert q.count == 1
+
+        # Should not have created evidence of execution
+        self.assertEquals(os.path.exists(SENTINEL_FILE), False)
+
+        resume(self.testconn)
+        w.work(burst=True)
+        assert q.count == 0
+        self.assertEquals(os.path.exists(SENTINEL_FILE), True)
+
+    def test_suspend_with_duration(self):
+        q = Queue()
+        for _ in range(5):
+            q.enqueue(do_nothing)
+
+        w = Worker([q])
+
+        # This suspends workers for working for 2 second
+        suspend(self.testconn, 2)
+
+        # So when this burst of work happens the queue should remain at 5
+        w.work(burst=True)
+        assert q.count == 5
+
+        sleep(3)
+
+        # The suspension should be expired now, and a burst of work should now clear the queue
+        w.work(burst=True)
+        assert q.count == 0
+
     def test_worker_hash_(self):
         """Workers are hashed by their .name attribute"""
         q = Queue('foo')