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"""Some debugging functions for working with the Scrapy engine"""
from __future__ import print_function
from time import time # used in global tests code
def get_engine_status(engine):
"""Return a report of the current engine status"""
tests = [
"time()-engine.start_time",
"engine.has_capacity()",
"len(engine.downloader.active)",
"engine.scraper.is_idle()",
"engine.spider.name",
"engine.spider_is_idle(engine.spider)",
"engine.slot.closing",
"len(engine.slot.inprogress)",
"len(engine.slot.scheduler.dqs or [])",
"len(engine.slot.scheduler.mqs)",
"len(engine.scraper.slot.queue)",
"len(engine.scraper.slot.active)",
"engine.scraper.slot.active_size",
"engine.scraper.slot.itemproc_size",
"engine.scraper.slot.needs_backout()",
]
checks = []
for test in tests:
try:
checks += [(test, eval(test))]
except Exception as e:
checks += [(test, "%s (exception)" % type(e).__name__)]
return checks
def format_engine_status(engine=None):
checks = get_engine_status(engine)
s = "Execution engine status\n\n"
for test, result in checks:
s += "%-47s : %s\n" % (test, result)
s += "\n"
return s
def print_engine_status(engine):
print(format_engine_status(engine))
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