Important points
- These components only connect to data sources and do not implement the operations and methods to handle the data. Therefore, the classes that extend these persistences must implement this logic on their own.
- Identifiable Persistences work with Identifiable objects, which have primary keys. A few standard operations are defined by default for these objects: reading arrays and data pages; searching for an object by its id; and creating, updating and deleting records of objects.
Interfaces
IFilteredPageReader
Interface for data processing components that can retrieve a page of data items by using a filter.
IFilteredReader
Interface for data processing components that can retrieve a list of data items by using a filter.
IGetter
Interface for data processing components that can get data items.
ILoader
Interface for data processing components that load data items.
IPartialUpdater
Interface for data processing components used to update data items partially.
IQuerablePageReader
Interface for data processing components that can query a page of data items.
IQuerableReader
Interface for data processing components that can query a list of data items.
ISaver
Interface for data processing components that save data items.
ISetter
Interface for data processing components that can set (create or update) data items.
IWriter
Interface for data processing components that can create, update and delete data items.
Types
FilePersistence
Abstract persistence component that stores data in flat files and caches them in memory.
This is the most basic persistence component that is only able to store data items of any type. Specific CRUD operations over the data items must be implemented in child classes by accessing the this._items property and calling the save method.
IdentifiableFilePersistence
Abstract persistence component that stores data in flat files and implements a number of CRUD operations over data items with unique ids. The data items must implement the [IIdentifiable interface]IIdentifiable
IdentifiableMemoryPersistence
Abstract persistence component that stores data in memory and implements a number of CRUD operations over data items with unique ids. The data items must implement the [IIdentifiable interface]IIdentifiable
JsonFilePersister
Persistence component that loads and saves data from/to a flat file. It is used by FilePersistence, but can be useful on its own.
MemoryPersistence
Abstract persistence component that stores data in memory.
This is the most basic persistence component that is only able to store data items of any type. Specific CRUD operations over the data items must be implemented in child classes by accessing the this._items property and calling the save method.