State Diagram

About

A State Diagram represents an object's lifecycle states and transitions between them based on events or conditions. It helps model real-world behaviour of objects.

Refer to the official documentation for more details - https://plantuml.com/state-diagram

Key Elements

1. States

   • Represented as rounded rectangles (e.g., "Idle", "Processing").

2. Transitions

   • Arrows indicating state changes due to events.

3. Initial & Final States

   • Black circle (initial state) marks the starting point.

   • Encircled black dot (final state) indicates the end.

4. Events & Conditions

   • Triggers for transitions (e.g., "User logs in").

1. User Authentication Flow

This represents a User Authentication Flow in a system.

• Initial State ([*]) and Transitions (-->).

• Different States (StateName): LoggedOut, LoggingIn, etc.

• Looping (Retry): Allows reattempting login.

@startuml
title User Authentication - State Diagram

[*] --> LoggedOut

LoggedOut --> LoggingIn : User enters credentials
LoggingIn --> LoggedIn : Authentication Success
LoggingIn --> LoginFailed : Authentication Failed

LoginFailed --> LoggedOut : Retry
LoggedIn --> LoggedOut : User Logs Out
LoggedIn --> SessionExpired : Inactivity Timeout

SessionExpired --> LoggedOut

@enduml