Exemple #1
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    def interval(self, interval, queue_id, queue_type='default'):
        """Updates the interval for a specific queue_id
        of a particular queue type.
        """
        # validate all the input
        if not is_valid_interval(interval):
            raise BadArgumentException('`interval` has an invalid value.')

        if not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        # generate the interval key
        interval_hmap_key = '%s:interval' % self._key_prefix
        interval_queue_key = '%s:%s' % (queue_type, queue_id)
        keys = [interval_hmap_key, interval_queue_key]

        args = [interval]
        interval_response = self._lua_interval(keys=keys, args=args)
        if interval_response == 0:
            # the queue with the id and type does not exist.
            response = {'status': 'failure'}
        else:
            response = {'status': 'success'}

        return response
Exemple #2
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    def finish(self, job_id, queue_id, queue_type='default'):
        """Marks any dequeued job as *completed successfully*.
        Any job which gets a finish will be treated as complete
        and will be removed from the SharQ.
        """
        if not is_valid_identifier(job_id):
            raise BadArgumentException('`job_id` has an invalid value.')

        if not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        keys = [self._key_prefix, queue_type]

        args = [queue_id, job_id]

        response = {'status': 'success'}

        finish_response = self._lua_finish(keys=keys, args=args)
        if finish_response == 0:
            # the finish failed.
            response.update({'status': 'failure'})

        return response
Exemple #3
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    def clear_queue(self, queue_type=None, queue_id=None, purge_all=False):
        """clear the all entries in queue with particular queue_id
        and queue_type. It takes an optional argument, 
        purge_all : if True, then it will remove the related resources
        from the redis.
        """
        if queue_id is None or not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if queue_type is None or not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        response = {'status': 'Failure', 'message': 'No queued calls found'}
        # remove from the primary sorted set
        primary_set = '{}:{}'.format(self._key_prefix, queue_type)
        queued_status = self._r.zrem(primary_set, queue_id)
        if queued_status:
            response.update({
                'status': 'Success',
                'message': 'Successfully removed all queued calls'
            })
        # do a full cleanup of reources
        # although this is not necessary as we don't remove resources
        # while dequeue operation
        job_queue_list = '{}:{}:{}'.format(self._key_prefix, queue_type,
                                           queue_id)
        if queued_status and purge_all:
            job_list = self._r.lrange(job_queue_list, 0, -1)
            pipe = self._r.pipeline()
            # clear the payload data for job_uuid
            for job_uuid in job_list:
                if job_uuid is None:
                    continue
                payload_set = '{}:payload'.format(self._key_prefix)
                job_payload_key = '{}:{}:{}'.format(queue_type, queue_id,
                                                    job_uuid)
                pipe.hdel(payload_set, job_payload_key)
            # clear jobrequest interval
            interval_set = '{}:interval'.format(self._key_prefix)
            job_interval_key = '{}:{}'.format(queue_type, queue_id)
            pipe.hdel(interval_set, job_interval_key)
            # clear job_queue_list
            pipe.delete(job_queue_list)
            pipe.execute()
            response.update({
                'status':
                'Success',
                'message':
                'Successfully removed all queued calls and purged related resources'
            })
        else:
            # always delete the job queue list
            self._r.delete(job_queue_list)
        return response
Exemple #4
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    def enqueue(self, payload, interval, job_id,
                queue_id, queue_type='default', requeue_limit=None):
        """Enqueues the job into the specified queue_id
        of a particular queue_type
        """
        # validate all the input
        if not is_valid_interval(interval):
            raise BadArgumentException('`interval` has an invalid value.')

        if not is_valid_identifier(job_id):
            raise BadArgumentException('`job_id` has an invalid value.')

        if not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        if requeue_limit is None:
            requeue_limit = self._default_job_requeue_limit

        if not is_valid_requeue_limit(requeue_limit):
            raise BadArgumentException('`requeue_limit` has an invalid value.')

        try:
            serialized_payload = serialize_payload(payload)
        except TypeError as e:
            raise BadArgumentException(e.message)

        timestamp = str(generate_epoch())

        keys = [
            self._key_prefix,
            queue_type
        ]

        args = [
            timestamp,
            queue_id,
            job_id,
            '"%s"' % serialized_payload,
            interval,
            requeue_limit
        ]

        self._lua_enqueue(keys=keys, args=args)

        response = {
            'status': 'queued'
        }
        return response
Exemple #5
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    def clear_queue(self, queue_type=None, queue_id=None, purge_all=False):
        """clear the all entries in queue with particular queue_id
        and queue_type. It takes an optional argument, 
        purge_all : if True, then it will remove the related resources
        from the redis.
        """
        if queue_id is None or not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if queue_type is None or not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        response = {
            'status': 'Failure',
            'message': 'No queued calls found'
            }
        # remove from the primary sorted set
        primary_set = '{}:{}'.format(self._key_prefix, queue_type)
        queued_status = self._r.zrem(primary_set, queue_id)
        if queued_status:
            response.update({'status': 'Success', 
                    'message': 'Successfully removed all queued calls'})
        # do a full cleanup of reources
        # although this is not necessary as we don't remove resources 
        # while dequeue operation
        job_queue_list = '{}:{}:{}'.format(self._key_prefix, queue_type, queue_id)
        if queued_status and purge_all:
            job_list = self._r.lrange(job_queue_list, 0, -1)
            pipe = self._r.pipeline()
            # clear the payload data for job_uuid
            for job_uuid in job_list:
                if job_uuid is None:
                    continue
                payload_set = '{}:payload'.format(self._key_prefix)
                job_payload_key = '{}:{}:{}'.format(queue_type, queue_id, job_uuid)
                pipe.hdel(payload_set, job_payload_key)
            # clear jobrequest interval
            interval_set = '{}:interval'.format(self._key_prefix)
            job_interval_key = '{}:{}'.format(queue_type, queue_id)
            pipe.hdel(interval_set, job_interval_key)
            # clear job_queue_list
            pipe.delete(job_queue_list)
            pipe.execute()
            response.update({'status': 'Success', 
                    'message': 'Successfully removed all queued calls and purged related resources'})
        else:
            # always delete the job queue list
            self._r.delete(job_queue_list)
        return response
Exemple #6
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    def dequeue(self, queue_type='default'):
        """Dequeues a job from any of the ready queues
        based on the queue_type. If no job is ready,
        returns a failure status.
        """
        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        timestamp = str(generate_epoch())

        keys = [self._key_prefix, queue_type]
        args = [timestamp, self._job_expire_interval]

        dequeue_response = self._lua_dequeue(keys=keys, args=args)

        if len(dequeue_response) < 4:
            response = {'status': 'failure'}
            return response

        queue_id, job_id, payload, requeues_remaining = dequeue_response
        payload = deserialize_payload(payload[1:-1])

        response = {
            'status': 'success',
            'queue_id': queue_id,
            'job_id': job_id,
            'payload': payload,
            'requeues_remaining': int(requeues_remaining)
        }

        return response
Exemple #7
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    def interval(self, interval, queue_id, queue_type='default'):
        """Updates the interval for a specific queue_id
        of a particular queue type.
        """
        # validate all the input
        if not is_valid_interval(interval):
            raise BadArgumentException('`interval` has an invalid value.')

        if not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        # generate the interval key
        interval_hmap_key = '%s:interval' % self._key_prefix
        interval_queue_key = '%s:%s' % (queue_type, queue_id)
        keys = [
            interval_hmap_key,
            interval_queue_key
        ]

        args = [
            interval
        ]
        interval_response = self._lua_interval(keys=keys, args=args)
        if interval_response == 0:
            # the queue with the id and type does not exist.
            response = {
                'status': 'failure'
            }
        else:
            response = {
                'status': 'success'
            }

        return response
Exemple #8
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    def finish(self, job_id, queue_id, queue_type='default'):
        """Marks any dequeued job as *completed successfully*.
        Any job which gets a finish will be treated as complete
        and will be removed from the SharQ.
        """
        if not is_valid_identifier(job_id):
            raise BadArgumentException('`job_id` has an invalid value.')

        if not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        keys = [
            self._key_prefix,
            queue_type
        ]

        args = [
            queue_id,
            job_id
        ]

        response = {
            'status': 'success'
        }

        finish_response = self._lua_finish(keys=keys, args=args)
        if finish_response == 0:
            # the finish failed.
            response.update({
                'status': 'failure'
            })

        return response
Exemple #9
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    def dequeue(self, queue_type='default'):
        """Dequeues a job from any of the ready queues
        based on the queue_type. If no job is ready,
        returns a failure status.
        """
        if not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        timestamp = str(generate_epoch())

        keys = [
            self._key_prefix,
            queue_type
        ]
        args = [
            timestamp,
            self._job_expire_interval
        ]

        dequeue_response = self._lua_dequeue(keys=keys, args=args)

        if len(dequeue_response) < 4:
            response = {
                'status': 'failure'
            }
            return response

        queue_id, job_id, payload, requeues_remaining = dequeue_response
        payload = deserialize_payload(payload[1:-1])

        response = {
            'status': 'success',
            'queue_id': queue_id,
            'job_id': job_id,
            'payload': payload,
            'requeues_remaining': int(requeues_remaining)
        }

        return response
Exemple #10
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    def metrics(self, queue_type=None, queue_id=None):
        """Provides a way to get statistics about various parameters like,
        * global enqueue / dequeue rates per min.
        * per queue enqueue / dequeue rates per min.
        * queue length of each queue.
        * list of queue ids for each queue type.
        """
        if queue_id is not None and not is_valid_identifier(queue_id):
            raise BadArgumentException('`queue_id` has an invalid value.')

        if queue_type is not None and not is_valid_identifier(queue_type):
            raise BadArgumentException('`queue_type` has an invalid value.')

        response = {
            'status': 'failure'
        }
        if not queue_type and not queue_id:
            # return global stats.
            # list of active queue types (ready + active)
            active_queue_types = self._r.smembers(
                '%s:active:queue_type' % self._key_prefix)
            ready_queue_types = self._r.smembers(
                '%s:ready:queue_type' % self._key_prefix)
            all_queue_types = active_queue_types | ready_queue_types
            # global rates for past 10 minutes
            timestamp = str(generate_epoch())
            keys = [
                self._key_prefix
            ]
            args = [
                timestamp
            ]

            enqueue_details, dequeue_details = self._lua_metrics(
                keys=keys, args=args)

            enqueue_counts = {}
            dequeue_counts = {}
            # the length of enqueue & dequeue details are always same.
            for i in xrange(0, len(enqueue_details), 2):
                enqueue_counts[str(enqueue_details[i])] = int(
                    enqueue_details[i + 1] or 0)
                dequeue_counts[str(dequeue_details[i])] = int(
                    dequeue_details[i + 1] or 0)

            response.update({
                'status': 'success',
                'queue_types': list(all_queue_types),
                'enqueue_counts': enqueue_counts,
                'dequeue_counts': dequeue_counts
            })
            return response
        elif queue_type and not queue_id:
            # return list of queue_ids.
            # get data from two sorted sets in a transaction
            pipe = self._r.pipeline()
            pipe.zrange('%s:%s' % (self._key_prefix, queue_type), 0, -1)
            pipe.zrange('%s:%s:active' % (self._key_prefix, queue_type), 0, -1)
            ready_queues, active_queues = pipe.execute()
            # extract the queue_ids from the queue_id:job_id string
            active_queues = [i.split(':')[0] for i in active_queues]
            all_queue_set = set(ready_queues) | set(active_queues)
            response.update({
                'status': 'success',
                'queue_ids': list(all_queue_set)
            })
            return response
        elif queue_type and queue_id:
            # return specific details.
            active_queue_types = self._r.smembers(
                '%s:active:queue_type' % self._key_prefix)
            ready_queue_types = self._r.smembers(
                '%s:ready:queue_type' % self._key_prefix)
            all_queue_types = active_queue_types | ready_queue_types
            # queue specific rates for past 10 minutes
            timestamp = str(generate_epoch())
            keys = [
                '%s:%s:%s' % (self._key_prefix, queue_type, queue_id)
            ]
            args = [
                timestamp
            ]

            enqueue_details, dequeue_details = self._lua_metrics(
                keys=keys, args=args)

            enqueue_counts = {}
            dequeue_counts = {}
            # the length of enqueue & dequeue details are always same.
            for i in xrange(0, len(enqueue_details), 2):
                enqueue_counts[str(enqueue_details[i])] = int(
                    enqueue_details[i + 1] or 0)
                dequeue_counts[str(dequeue_details[i])] = int(
                    dequeue_details[i + 1] or 0)

            # get the queue length for the job queue
            queue_length = self._r.llen('%s:%s:%s' % (
                self._key_prefix, queue_type, queue_id))

            response.update({
                'status': 'success',
                'queue_length': int(queue_length),
                'enqueue_counts': enqueue_counts,
                'dequeue_counts': dequeue_counts
            })
            return response
        elif not queue_type and queue_id:
            raise BadArgumentException(
                '`queue_id` should be accompanied by `queue_type`.')

        return response