All process flows within the Charges domain will be gathered here.
Below process flow covers both the handling of Charge Information and Charge Prices requests as they are rather similar.
This is also the reason why generic event names are applied. Event names will be prefixed with either ChargeInformation or ChargePrices in the source code.
The below process flow depicts the rule set applied in the ChargeCommandReceiverEndpoint for persisting incoming charges in the SQL database.
It documents the different persistence paths the system takes given circumstances like charge already exists (same Charge ID, type and owner), whether it is an update or stop operation, and whether a stop already exists on the charge's timeline and if this stop is being cancelled or not.
The rule set was built upon the scenarios listed here and it is assumed that the incoming charge has been converted to an internal model, i.e. the Charge Command and has passed both input and business validation.
Note, stopping a charge results in a removal of any registered prices from the stop date and forwards.
The rule set for persisting charge prices.
A charge owner may want to submit a charge price request (D08) containing a price series for monthly (resolution) charge, where the price series' start and end date time values do not equal the first of a month. Such a price series is to be known as an irregular price series and it may be relevant when the charge owner wants to:
- change the monthly charge price during the month
- submit a price up to the charge's stop date, which may be during a month
Currently an irregular price series is only relevant for charges with a monthly resolution (P1M), such as fees and subscriptions.
The rule set for persisting irregular price series is no different than the normal way of persisting charge prices, nevertheless a list of irregular price series persistence scenarios and their expected outcome can be found here.
The following image depicts the charge link process flow. It also shows the micro services involved along with the activities they perform.
