Persistent state
Persist state in an Hive database across restarts and returns from hibernation
Usage
Create state update types
Define the state mutations:
enum UpdateType { intProp, stringProp, doubleProp, listProp, mapProp }Create the state class
Create your state class and map the properties to the persitent store:
import 'package:persistent_state/persistent_state.dart';
enum UpdateType { intProp, stringProp, doubleProp, listProp, mapProp }
class AppState with PersistentState<UpdateType> {
int get intProp => select<int>("int_prop");
set intProp(int v) => mutate<int>("int_prop", v, UpdateType.intProp);
double get doubleProp => select<double>("double_prop");
set doubleProp(double v) =>
mutate<double>("double_prop", v, UpdateType.doubleProp);
String get stringProp => select<String>("string_prop");
set stringProp(String v) =>
mutate<String>("string_prop", v, UpdateType.stringProp);
List<int> get listProp => select<List<int>>("list_prop");
set listProp(List<int> v) =>
mutate<List<int>>("list_prop", v, UpdateType.listProp);
Map<String, int> get mapProp => select<Map<String, int>>("map_prop");
set mapProp(Map<String, int> v) =>
mutate<Map<String, int>>("map_prop", v, UpdateType.mapProp);
} All the mutations will be persisted to the database:
final AppState state = AppState();
state.doubleProp = 3.0;Note: the state reads with select do not hit the database and
use an in memory copy of the state
Listen to state changes
A changefeed is available:
/// [appState] is an [AppState] instance
appState.changeFeed.listen((StateUpdate change) =>
print("State update: \n${change.type}");Example
An example with Provider is available
