observer

Documentation

Overview

Package observer implements the Observer design pattern. Observers are defined by the Observer interface, and publishers (subjects) implement the Observable interface. TvShow is a concrete implementation of Observable that can broadcast TV programs to its subscribers. TvStation is a concrete implementation of Observer that reacts to updates through the Update callback function while subscribed to one or more TvShows.

Index

• func Run()
• type Broadcasting
• type Observable
• type Observer
• type TvShow
  • func NewTvShow(title string) *TvShow
  • func (t *TvShow) Broadcast(message string)
  • func (t *TvShow) Notify(data any)
  • func (t *TvShow) Subscribe(listener Observer)
  • func (t *TvShow) Unsubscribe(listener Observer)
• type TvStation
  • func NewTvStation(name string, frequency float32) *TvStation
  • func (t *TvStation) Update(data any)

Functions

func Run

func Run()

Types

type Broadcasting

type Broadcasting interface {
	Observable
	Broadcast(message string)
}

Broadcasting defines the common interface for all broadcasting programs and shows.

type Observable

type Observable interface {
	Subscribe(listener Observer)
	Unsubscribe(listener Observer)
	Notify(data any)
}

Observable defines the interface for broadcasts subscriptions.

type Observer

type Observer interface {
	Update(data any)
}

Observer defines the interface for all broadcasts observers.

type TvShow

type TvShow struct {
	// contains filtered or unexported fields
}

TvShow represents a single broadcastable TV show.

func NewTvShow

func NewTvShow(title string) *TvShow

NewTvShow creates the new TV show.

func (*TvShow) Broadcast

func (t *TvShow) Broadcast(message string)

Broadcast sends a message to all broadcasters subscribed to this TV show.

func (*TvShow) Notify

func (t *TvShow) Notify(data any)

Notify implements the Observable interface by publishing updates to all subscribed broadcasters.

func (*TvShow) Subscribe

func (t *TvShow) Subscribe(listener Observer)

Subscribe adds a broadcaster to the list of subscribers for this TV show.

func (*TvShow) Unsubscribe

func (t *TvShow) Unsubscribe(listener Observer)

Unsubscribe allows to unsubscribe broadcaster from the TV show.

type TvStation

type TvStation struct {
	// contains filtered or unexported fields
}

TvStation represents the TV channel broadcaster, that could be subscribed to the specific TV shows.

func NewTvStation

func NewTvStation(name string, frequency float32) *TvStation

NewTvStation creates the new TV station.

func (*TvStation) Update

func (t *TvStation) Update(data any)

Update implements the callback function for the external publishers (TV shows).