JsonFilePersister<T> class

Persistence component that loads and saves data from/to flat file.

It is used by FilePersistence, but can be useful on its own.

Configuration parameters

• path: path to the file where data is stored

Example

var persister = JsonFilePersister("./data/data.json");

await persister.save("123", ["A", "B", "C"]);
    ...
var items = await persister.load("123");
print(items);  // Result: ["A", "B", "C"]

Implemented types

• ILoader<T>
• ISaver<T>

Constructors

JsonFilePersister([String? path])

Creates a new instance of the persistence.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

path ↔ String?

Gets the file path where data is stored.

getter/setter pair

path_ ↔ String?

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

configure(ConfigParams config) → void

Configures component by passing configuration parameters.

load(String? correlation_id) → Future<List<T>>

Loads data items from external JSON file.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

save(String? correlation_id, List<T?> items) → Future

Saves given data items to external JSON file.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited