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@@ -0,0 +1,106 @@
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+# What
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+
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+Database changes notification library.
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+
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+### Example
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+
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+```go
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+package main
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+
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+import (
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+ "encoding/json"
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+ "log"
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+ "net/http"
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+
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+ "git.icod.de/dalu/notifier"
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+ "github.com/gin-gonic/gin"
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+ "gopkg.in/olahol/melody.v1"
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+)
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+
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+func main() {
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+ r := gin.Default()
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+ m := melody.New()
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+ n := notifier.NewNotifier(m)
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+ h := NewHandler(n)
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+
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+ r.GET("/", h.Index)
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+ r.GET("/ws", func(cx *gin.Context) {
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+ m.HandleRequest(cx.Writer, cx.Request)
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+ })
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+ r.GET("/acme/ins", h.InsertDB)
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+
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+ go n.Listen(func(notification *notifier.Notification) {
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+ b, e := json.Marshal(notification)
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+ if e != nil {
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+ log.Println(e.Error())
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+ return
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+ }
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+ m.Broadcast(b)
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+ })
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+ r.Run(":5000")
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+}
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+
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+type Handler struct {
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+ notifier *notifier.Notifier
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+}
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+
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+func NewHandler(n *notifier.Notifier) *Handler {
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+ h := new(Handler)
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+ h.notifier = n
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+ return h
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+
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+}
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+
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+func (h *Handler) Index(cx *gin.Context) {
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+ http.ServeFile(cx.Writer, cx.Request, "index.html")
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+}
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+
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+func (h *Handler) InsertDB(cx *gin.Context) {
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+ // Do database insert stuff
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+ h.notifier.Notify("acme", "INSERT", []byte(`{"id": 1, "name": acme}`))
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+ cx.JSON(201, map[string]interface{}{"status": "ok"})
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+}
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+```
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+
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+```html
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+<html>
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+<head>
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+ <title>Melody example: chatting</title>
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+</head>
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+
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+<style>
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+ #chat {
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+ text-align: left;
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+ background: #f1f1f1;
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+ width: 500px;
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+ min-height: 300px;
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+ padding: 20px;
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+ }
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+</style>
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+
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+<body>
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+<div align="center">
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+ <h3>Chat</h3>
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+ <pre id="chat"></pre>
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+</div>
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+
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+<script>
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+ let url = "ws://localhost:5000/ws";
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+ let ws = new WebSocket(url);
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+
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+ let chat = document.getElementById("chat");
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+
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+ let now = function () {
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+ let iso = new Date().toISOString();
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+ return iso.split("T")[1].split(".")[0];
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+ };
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+
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+ ws.onmessage = function (msg) {
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+ let line = now() + " " + msg.data + "\n";
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+ chat.innerText += line;
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+ };
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+</script>
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+</body>
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+</html>
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+```
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+
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