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Build # 37

Build Type

push

travis-ci

Committed by pablohoffman

Commit Message

Removed signals/stats singletons

This change removes singletons for stats collection and signal
dispatching facilities, by making them a member of the Crawler class.

Here are some examples to illustrates the old and new API:

Signals - before:

    from scrapy import signals
    from scrapy.xlib.pydispatch import dispatcher
    dispatcher.connect(self.spider_opened, signals.spider_opened)

Signals - now:

    from scrapy import signals
    crawler.signals.connect(self.spider.opened, signals.spider_opened)

Stats collection - before:

    from scrapy.stats import stats
    stats.inc_value('foo')

Stats collection - now:

    crawler.stats.inc_value('foo')

Backwards compatibility was retained as much as possible and the old API
has been properly flagged with deprecation warnings.

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