mirror of
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df54ed0041
* added minimal web ui * return unique id per job (spider scheduled) * store one log per spider run (job) and rotate them, keeping the last N logs (where N is configurable through settings)
102 lines
3.5 KiB
Python
102 lines
3.5 KiB
Python
import sys, os
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from shutil import copyfileobj
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from tempfile import mkstemp
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from datetime import datetime
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from twisted.internet import reactor, defer, protocol, error
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from twisted.application.service import Service
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from twisted.python import log
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from scrapy.utils.py26 import cpu_count
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from scrapy.utils.python import stringify_dict
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from scrapyd.utils import get_crawl_args
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from .interfaces import IPoller, IEggStorage, IEnvironment
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class Launcher(Service):
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name = 'launcher'
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def __init__(self, config, app):
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self.processes = {}
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self.max_proc = config.getint('max_proc', 0)
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if not self.max_proc:
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self.max_proc = cpu_count() * config.getint('max_proc_per_cpu', 4)
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self.egg_runner = config.get('egg_runner', 'scrapyd.eggrunner')
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self.app = app
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def startService(self):
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for slot in range(self.max_proc):
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self._wait_for_project(slot)
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log.msg("%s started: max_proc=%r, egg_runner=%r" % (self.parent.name, \
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self.max_proc, self.egg_runner), system="Launcher")
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def _wait_for_project(self, slot):
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poller = self.app.getComponent(IPoller)
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poller.next().addCallback(self._spawn_process, slot)
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def _get_eggpath(self, project):
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eggstorage = self.app.getComponent(IEggStorage)
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version, eggf = eggstorage.get(project)
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if eggf is None:
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return
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prefix = '%s-%s-' % (project, version)
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fd, eggpath = mkstemp(prefix=prefix, suffix='.egg')
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lf = os.fdopen(fd, 'wb')
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copyfileobj(eggf, lf)
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lf.close()
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return eggpath
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def _spawn_process(self, message, slot):
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msg = stringify_dict(message, keys_only=False)
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project = msg['project']
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eggpath = self._get_eggpath(project)
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args = [sys.executable, '-m', self.egg_runner, 'crawl']
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args += get_crawl_args(msg)
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e = self.app.getComponent(IEnvironment)
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env = e.get_environment(msg, slot, eggpath)
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pp = ScrapyProcessProtocol(eggpath, slot, project, msg['spider'], msg['_id'])
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pp.deferred.addBoth(self._process_finished, eggpath, slot)
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reactor.spawnProcess(pp, sys.executable, args=args, env=env)
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self.processes[slot] = pp
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def _process_finished(self, _, eggpath, slot):
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if eggpath:
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os.remove(eggpath)
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self.processes.pop(slot)
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self._wait_for_project(slot)
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class ScrapyProcessProtocol(protocol.ProcessProtocol):
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def __init__(self, eggfile, slot, project, spider, job):
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self.eggfile = eggfile
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self.slot = slot
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self.pid = None
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self.project = project
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self.spider = spider
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self.job = job
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self.start_time = datetime.now()
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self.deferred = defer.Deferred()
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def outReceived(self, data):
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log.msg(data.rstrip(), system="Launcher,%d/stdout" % self.pid)
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def errReceived(self, data):
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log.msg(data.rstrip(), system="Launcher,%d/stderr" % self.pid)
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def connectionMade(self):
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self.pid = self.transport.pid
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self.log("Process started: ")
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def processEnded(self, status):
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if isinstance(status.value, error.ProcessDone):
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self.log("Process finished: ")
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else:
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self.log("Process died: exitstatus=%r " % status.value.exitCode)
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self.deferred.callback(self)
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def log(self, msg):
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msg += "project=%r spider=%r job=%r pid=%r egg=%r" % (self.project, \
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self.spider, self.job, self.pid, self.eggfile)
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log.msg(msg, system="Launcher")
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