net_instaweb::CriticalSelectorFinder Class Reference

#include "critical_selector_finder.h"

Inheritance diagram for net_instaweb::CriticalSelectorFinder:

Public Member Functions
	CriticalSelectorFinder (const PropertyCache::Cohort *cohort, NonceGenerator *nonce_generator, Statistics *stats)
bool	IsCriticalSelector (RewriteDriver *driver, const GoogleString &selector)
const StringSet &	GetCriticalSelectors (RewriteDriver *driver)
virtual void	WriteCriticalSelectorsToPropertyCache (const StringSet &selector_set, StringPiece nonce, RewriteDriver *driver)
BeaconMetadata	PrepareForBeaconInsertion (const StringSet &selector_set, RewriteDriver *driver)
virtual int	SupportInterval () const =0
	Gets the SupportInterval for a new beacon result.

Static Public Member Functions
static void	InitStats (Statistics *statistics)
static void	WriteCriticalSelectorsToPropertyCacheStatic (const StringSet &selector_set, StringPiece nonce, int support_interval, bool should_replace_prior_result, const PropertyCache *cache, const PropertyCache::Cohort *cohort, AbstractPropertyPage *page, MessageHandler *message_handler, Timer *timer)

Static Public Attributes
static const char	kCriticalSelectorsValidCount []
static const char	kCriticalSelectorsExpiredCount []
static const char	kCriticalSelectorsNotFoundCount []
static const char	kCriticalSelectorsPropertyName []

Protected Member Functions
virtual bool	ShouldReplacePriorResult () const
	Returns true if a beacon result should replace all previous results.

Detailed Description

Interface to store/retrieve critical selector information in the property cache. See critical_finder_support_util.h for a description on how critical selectors are stored and updated.

Constructor & Destructor Documentation

net_instaweb::CriticalSelectorFinder::CriticalSelectorFinder	(	const PropertyCache::Cohort *	cohort,
		NonceGenerator *	nonce_generator,
		Statistics *	stats
	)

All of the passed-in constructor arguments are owned by the caller. If critical selector data is being received from a trusted source (ShouldReplacePriorResult() must return true in this case), nonce_generator may be NULL.

Member Function Documentation

BeaconMetadata net_instaweb::CriticalSelectorFinder::PrepareForBeaconInsertion	(	const StringSet &	selector_set,
		RewriteDriver *	driver
	)

Given a set of candidate critical selectors, decide whether beaconing should take place. We should always beacon if there's new critical selector data. Otherwise re-beaconing is based on a time and request interval. Returns the BeaconMetadata; result.status indicates whether beaconing should occur.

virtual void net_instaweb::CriticalSelectorFinder::WriteCriticalSelectorsToPropertyCache ( const StringSet &  selector_set, StringPiece  nonce, RewriteDriver *  driver  )

virtual

Updates the critical selectors in the property cache. Support for the new selector_set is added to the existing record of beacon support. This updates the value in the in-memory property page but does not write the cohort. If results are obtained from a trusted source (ShouldReplacePriorResult() must return true) then nonce may be NULL.

static void net_instaweb::CriticalSelectorFinder::WriteCriticalSelectorsToPropertyCacheStatic ( const StringSet &  selector_set, StringPiece  nonce, int  support_interval, bool  should_replace_prior_result, const PropertyCache *  cache, const PropertyCache::Cohort *  cohort, AbstractPropertyPage *  page, MessageHandler *  message_handler, Timer *  timer  )

static

As above, but suitable for use in a beacon context where no RewriteDriver is available.

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The documentation for this class was generated from the following file:

• net/instaweb/rewriter/public/critical_selector_finder.h