Class Store

A store holds the whole state tree of your application. The only way to change the state inside it is to dispatch an action on it. Your application should only have a single store in a Redux app. As your app grows, instead of adding stores, you split the root reducer into smaller reducers independently operating on the different parts of the state tree.

The store has the following responsibilities:
- Holds application state
- Allows access to state via GetState<TState>(string)
- Allows state to be updated via Dispatch(Action)
- Registers listeners via Subscribe<TState>(string, Action<TState>)
- Handles unregistering of listeners via the function returned by Subscribe<TState>(string, Action<TState>)

Here are some important principles you should understand about Reducers:
- Reducers are the only way to update the state.
- Reducers are pure functions that take the previous state and an action, and return the next state.
- Reducers must be pure functions. They should not mutate the state, perform side effects like API calls or routing transitions, or call non-pure functions.
- Reducers must not do asynchronous logic.
- Reducers must not call other Reducer.
- Reducers must not call Subscribe<TState>(string, Action<TState>).
- Reducers must not call GetState<TState>(string)
- Reducers must not call Dispatch(Action)

Inheritance

object

Store

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Namespace: Unity.AppUI.Redux

Assembly: Unity.AppUI.Redux.dll

Syntax

public class Store

Constructors

Store()

Creates a Redux store that holds the complete state tree of your app.

Declaration

public Store()

Methods

CombineReducers(params Reducer[])

Create a reducer that combines multiple reducers into one.

Declaration

public static Reducer CombineReducers(params Reducer[] reducers)

Parameters

Type	Name	Description
Reducer[]	reducers	The reducers to combine.

Returns

Type	Description
Reducer	A reducer that combines the given reducers.

CreateAction(string)

Create a new Action. See Action for more information.

Declaration

public static ActionCreator CreateAction(string type)

Parameters

Type	Name	Description
string	type	The type of the action.

Returns

Type	Description
ActionCreator	A new Action.

CreateAction(string, Type)

Create a new Action. See Action<TPayload> for more information.

Declaration

public static ActionCreator CreateAction(string type, Type actionType)

Parameters

Type	Name	Description
string	type	The type of the action.
Type	actionType	The type of the action to instantiate.

Returns

Type	Description
ActionCreator	A new Action.

CreateAction<TPayload>(string)

Create a new Action. See Action<TPayload> for more information.

Declaration

public static ActionCreator<TPayload> CreateAction<TPayload>(string type)

Parameters

Type	Name	Description
string	type	The type of the action.

Returns

Type	Description
ActionCreator<TPayload>	A new Action.

Type Parameters

Name	Description
TPayload	The type of the payload.

CreateReducer<TState>(TState, Action<ReducerSwitchBuilder<TState>>)

Create reducers for a state slice. See SliceReducerSwitchBuilder<TState> for more information.

Declaration

public static Reducer CreateReducer<TState>(TState initialState, Action<ReducerSwitchBuilder<TState>> builderCallback)

Parameters

Type	Name	Description
TState	initialState	The initial state of the state slice.
Action<ReducerSwitchBuilder<TState>>	builderCallback	The builder that will be used to create the reducers.

Returns

Type	Description
Reducer	A reducer record that can be used to create a state slice.

Type Parameters

Name	Description
TState	The type of the state.

CreateSlice<TState>(string, TState, Action<SliceReducerSwitchBuilder<TState>>, Action<ReducerSwitchBuilder<TState>>)

Create a new state slice. A state slice is a part of the state tree. You can provide reducers that will "own" the state slice at the same time.

Declaration

public Slice<TState> CreateSlice<TState>(string name, TState initialState, Action<SliceReducerSwitchBuilder<TState>> reducers, Action<ReducerSwitchBuilder<TState>> extraReducers = null)

Parameters

Type	Name	Description
string	name	The name of the state slice.
TState	initialState	The initial state of the state slice.
Action<SliceReducerSwitchBuilder<TState>>	reducers	The reducers that will "own" the state slice.
Action<ReducerSwitchBuilder<TState>>	extraReducers	The reducers that will be called if the action type does not match any of the main reducers.

Returns

Type	Description
Slice<TState>	A slice object that can be used to access the state slice.

Type Parameters

Name	Description
TState	The type of the state.

Remarks

You can also provide extra reducers that will be called if the action type does not match any of the main reducers.

Exceptions

Type	Condition
ArgumentException	Thrown if the state slice already exists.

Dispatch(string)

Dispatches an action. This is the only way to trigger a state change.

Declaration

public void Dispatch(string actionType)

Parameters

Type	Name	Description
string	actionType	The type of the action.

Dispatch(Action)

Dispatches an action. This is the only way to trigger a state change.

Declaration

public void Dispatch(Action action)

Parameters

Type	Name	Description
Action	action	An object describing the change that makes up the action.

Exceptions

Type	Condition
ArgumentException	Thrown if the reducer for the action type does not exist.

Dispatch<T>(string, T)

Dispatches an action. This is the only way to trigger a state change.

Declaration

public void Dispatch<T>(string actionType, T payload)

Parameters

Type	Name	Description
string	actionType	The type of the action.
T	payload	The payload of the action.

Type Parameters

Name	Description
T	The type of the payload.

GetState()

Returns the current state tree of your application. It is equal to the last value returned by the store's reducer.

Declaration

public Dictionary<string, object> GetState()

Returns

Type	Description
Dictionary<string, object>	The current state tree of your application.

GetState<TState>(string)

Returns the current state tree of your application for a specific slice. It is equal to the last value returned by the store's reducer.

Declaration

public TState GetState<TState>(string name)

Parameters

Type	Name	Description
string	name	The name of the state slice.

Returns

Type	Description
TState	The current state tree of your application.

Type Parameters

Name	Description
TState	The type of the state.

Exceptions

Type	Condition
ArgumentException	Thrown if the state slice does not exist.

NotifyStateChanged(string)

Force notify all listeners of a state slice.

Declaration

public void NotifyStateChanged(string name)

Parameters

Type	Name	Description
string	name	The name of the state slice.

Subscribe<TState>(string, Action<TState>)

Adds a change listener. It will be called any time an action is dispatched, and some part of the state tree may potentially have changed.

Declaration

public Unsubscriber Subscribe<TState>(string name, Action<TState> listener)

Parameters

Type	Name	Description
string	name	The name of the state slice.
Action<TState>	listener	A callback to be invoked on every dispatch.

Returns

Type	Description
Unsubscriber	A function to remove this change listener.

Type Parameters

Name	Description
TState	The type of the state.

Remarks

This method doesn't check for duplicate listeners, so calling it multiple times with the same listener will result in the listener being called multiple times.