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#!/usr/bin/env python |
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# coding:utf-8 |
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"""beanstalk queue - queue based on beanstalk |
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Setting: you need to set max-job-size bigger(default 65535) |
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DAEMON_OPTS="-l $BEANSTALKD_LISTEN_ADDR -p $BEANSTALKD_LISTEN_PORT -z 524288" |
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""" |
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import time |
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import umsgpack |
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import beanstalkc |
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import threading |
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import logging |
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from six.moves import queue as BaseQueue |
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class BeanstalkQueue(object): |
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max_timeout = 0.3 |
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Empty = BaseQueue.Empty |
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Full = BaseQueue.Full |
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def __init__(self, name, host='localhost:11300', maxsize=0): |
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""" |
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Constructor for a BeanstalkdQueue. |
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""" |
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self.name = name |
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config = host.split(':') |
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self.host = config[0] if len(config) else 'localhost' |
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self.port = int(config[1]) if len(config) > 1 else 11300 |
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self.lock = threading.RLock() |
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self.maxsize = maxsize |
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self.reconnect() |
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def stats(self): |
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try: |
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with self.lock: |
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stats = self.connection.stats_tube(self.name) |
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except beanstalkc.CommandFailed as err: |
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# tube is empty |
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if err[1] == 'NOT_FOUND': |
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return {} |
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stats = [item.split(': ') for item in stats.split('\n') if item.find(':')] |
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stats = [(item[0], item[1]) for item in stats if len(item) == 2] |
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return dict(stats) |
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def reconnect(self): |
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self.connection = beanstalkc.Connection(host=self.host, port=self.port, parse_yaml=False) |
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self.connection.use(self.name) |
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self.connection.watch(self.name) |
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def qsize(self): |
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stats = self.stats() |
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return int(stats.get('current-jobs-ready', 0)) |
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def empty(self): |
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if self.qsize() == 0: |
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return True |
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else: |
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return False |
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def full(self): |
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if self.maxsize and self.qsize() >= self.maxsize: |
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return True |
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else: |
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return False |
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def put(self, obj, block=True, timeout=None): |
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if not block: |
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return self.put_nowait(obj) |
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start_time = time.time() |
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while True: |
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try: |
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return self.put_nowait(obj) |
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except BaseQueue.Full: |
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if timeout: |
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lasted = time.time() - start_time |
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if timeout > lasted: |
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time.sleep(min(self.max_timeout, timeout - lasted)) |
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else: |
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raise |
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else: |
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time.sleep(self.max_timeout) |
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def put_nowait(self, obj): |
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if self.full(): |
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raise BaseQueue.Full |
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with self.lock: |
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return self.connection.put(umsgpack.packb(obj)) |
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def get(self, block=True, timeout=None): |
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if not block: |
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return self.get_nowait() |
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start_time = time.time() |
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while True: |
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try: |
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return self.get_nowait() |
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except BaseQueue.Empty: |
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if timeout: |
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lasted = time.time() - start_time |
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if timeout > lasted: |
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time.sleep(min(self.max_timeout, timeout - lasted)) |
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else: |
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raise |
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else: |
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time.sleep(self.max_timeout) |
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def get_nowait(self): |
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try: |
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with self.lock: |
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job = self.connection.reserve(0) |
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if not job: |
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raise BaseQueue.Empty |
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else: |
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body = umsgpack.unpackb(job.body) |
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job.delete() |
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return body |
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except beanstalkc.DeadlineSoon: |
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raise BaseQueue.Empty |
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Queue = BeanstalkQueue |
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binux /
pyspider
