Lifecycle of a Request for a Targeted Advertisement
This topic describes the steps the Content Selection Framework (CSF) follows to retrieve a targeted advertisement for delivery on the site. The discount selection process is identical, except for replacing the AdvertisingNeedOfDelivery component in one pipeline with the ScoreDiscounts component in the other.
A user accesses an ASP Web page
A user clicks an ad
The CacheManager object background thread fires
A user accesses an ASP Web page
The code in the ASP page creates the ContentSelector object (CSO).
The code in the ASP page sets the CSO page context properties.
The code in the ASP page calls the CSO.GetContent method.
The CSO invokes the Advertising pipeline.
The InitCSFPipeline component calls the CacheManager.GetCache method.
The CacheManager object invokes the CSFLoadAdvertisements component (only the first time).
The InitCSFPipeline component copies some page and global context properties into the Pipe Context dictionary.
The InitCSFPipeline component creates filters for the Size and PageGroups properties.
The LoadHistory component loads the user-specific history string.
The FilterContent component applies the filters.
The AdvertisingNeedOfDelivery component assigns each ad an initial score based on the start date and end date of the ad, the duration of the ad run, and how many events have been served to date.
The HistoryPenalty component applies penalties for ads that have already been shown to the current user and enforces exposure limits.
The EvalTargetGroups component evaluates target groups and adjusts scores.
The SelectWinners component selects the winning advertisement(s). It prevents industry collision and uses the PageHistory string to avoid showing the same ad multiple times on the same page.
The RecordEvent component records the event into an in-memory performance dictionary.
The IISAppendToLog component records the event to the IIS log file.
The RecordHistory component records the event to the user-specific history string.
The SaveHistory component saves the user-specific history string.
The FormatTemplate component formats the selected advertisements using a template that brings together ad properties, page context, and global context and puts the resulting strings into a SimpleList object.
The CSO returns a SimpleList object of formatted advertisements.
The content is rendered onto the ASP page.
A user clicks an ad
The Redir.asp page is called.
The Redir.asp page invokes the RecordEvent component.
The RecordEvent and IISAppendToLog components are called.
The content is rendered onto the ASP page.
The CacheManager object background thread fires
The CSFWriteEvents component flushes events in the in-memory performance dictionary to the database.
The CSFLoadAdvertisements component loads new advertising information, including the updated aggregate event counts used for the Need Of Delivery (NOD) calculation.