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How to understand xState, in view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

XState

A state machine editot and runtime. Can be used to model simple workflow

Brief introduction

The xState editor is an editor that allows developers to create state machines through a common and intuitive solution.

Applicable scenario

State machines are widely used for domain models with definite states such as orders, users, tasks, and so on.

Characteristics

Combine model and code

You can create a state machine that contains only states and transitions

It can also provide triggers for state transition.

State transfer trigger

EntryAction

ExitAction

TransitionAction

State transfer check

TransitionGuard

Use example

Models can be used by tools to trigger state transitions at run time

How to pass business attributes

Sometimes you need to pass business information to each trigger of the state machine for judgment. Although these attributes are not found in the default Event class, because Event is a common class, users can customize their own Event subclass and define the required business attributes in the subclass. When allowed, you can get additional attributes in the cast standard Event for your custom Event class in each Action.

How to restore the state before the state machine

Sometimes you need to save the current state of the state machine and restore it later. You can do this by calling restore (String id) of StateMachine, passing in the state id that needs to be restored.

How to reset the state machine

When the state machine is not in the End state, you can reset the state of the state machine by calling the reset () method.

Integration description

Reference sample POM

Depenency

Com.xrosstools xstate ${latest} Demo project

Demo

Real case simple state machine

Complex state machine

The answer to the question on how to understand xState is shared here. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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