mirror of
https://github.com/scrapy/scrapy.git
synced 2025-02-25 04:04:21 +00:00
fa644f7a5e
- launcher no longer knows about egg storage - removed get_spider_list_from_eggifile() file and replaced by simpler get_spider_list() which doesn't receive en egg file as argument - changed "egg runner" name to just "runner" to reflect the fact that it doesn't necesarilly run eggs (though it does in the default case) --HG-- rename : scrapyd/eggrunner.py => scrapyd/runner.py
88 lines
3.0 KiB
Python
88 lines
3.0 KiB
Python
import sys, os
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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, 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.runner = config.get('runner', 'scrapyd.runner')
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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, runner=%r" % (self.parent.name, \
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self.max_proc, self.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 _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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args = [sys.executable, '-m', self.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)
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env = stringify_dict(env, keys_only=False)
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pp = ScrapyProcessProtocol(slot, project, msg['_spider'], \
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msg['_job'], env)
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pp.deferred.addBoth(self._process_finished, 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, _, slot):
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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, slot, project, spider, job, env):
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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.env = env
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self.logfile = env['SCRAPY_LOG_FILE']
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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 log=%r" % (self.project, \
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self.spider, self.job, self.pid, self.logfile)
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log.msg(msg, system="Launcher")
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