EventBus lib in Golang!

> Simple event source system

This project lets you publish and subscribe events easily.

To download:

go get github.com/Raezil/GoEventBus

Quick Start

Let's make a pub/sub application:

1. Create a project

mkdir demo
cd demo
go mod init demo

2. Add main.go

package main

import (
	"encoding/json"
	"fmt"
	"log"
	"net/http"

	gbus "github.com/Raezil/GoEventBus"
	"github.com/gorilla/mux"
	_ "github.com/lib/pq"
)

// The message entity to be dispatched
type HouseWasSold struct{}

func main() {
	dispatcher := &gbus.Dispatcher{
		"main.HouseWasSold": func(m *map[string]any) (map[string]interface{}, error) {
			fmt.Println(*m)
			return *m, nil
		},
	}
	eventstore := gbus.NewEventStore(dispatcher)

	connStr := "postgres://postgres:postgres@localhost:5432/eventstore?sslmode=disable"
	gbus.SetEventStoreDB(connStr)

	router := mux.NewRouter()
	router.HandleFunc("/house-sold", func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusAccepted)
		eventstore.Publish(gbus.NewEvent(
			HouseWasSold{},
			map[string]any{
				"Price": 100,
			},
		))
		eventstore.Run()

		w.Header().Set("Content-Type", "application/json")
		response := map[string]string{"status": "House sold event published"}
		json.NewEncoder(w).Encode(response)
	})
	serverAddress := ":8080"
	log.Printf("Server is listening on %s", serverAddress)
	if err := http.ListenAndServe(serverAddress, router); err != nil {
		log.Fatalf("Failed to start server: %v", err)
	}
}

3. Get the dependency

go get github.com/Shibbaz/[email protected]

4. Run the project

go run ./

Output:

2024/04/14 16:40:04 Event id of 6da96821-b27a-4db4-8f5f-e7a1e189b813 was published from channel 'd7a3c677-f328-4f76-addc-d11d64cde566'
2024/04/14 16:40:04 Channel a2cb010f-af65-4030-9e1e-44cdbd9baa5a was opened
dispatch: map[price:100]
...