repositoryBuilder
Takes a reducer and an adapter and returns a repository. A repository is the layer of our Onion Architecture (see Introduction) which handles data persistence.
The
write-model
repository has a single method called getById
. When invoked, it uses the adapter to load all events for given ID and runs them through the reducer to calculate the current state. It returns an object that contains state
and also a save
method, which is used to append new events.build({ adapter, reducer })
builds a repository
attribute | type | description |
adapter | object | |
reducer | function | a function which, given a list of events, knows how to calculate the current state of an object. |
{ getById }
- an object with the getById
function.getById(id)
Loads and returns the current state of an entity. Also returns a
save
function for appending new events to the data store.attribute | type | description |
id | string | the id of the entity |
{ state, save }
- an object containing an arbitrary state
object, and a save
function.save(events)
Appends new events to the datastore
attribute | type | description |
events | array | an array of arbitrary event objects |
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Last modified 4yr ago