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37 lines
1.2 KiB
Go
37 lines
1.2 KiB
Go
package main
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import (
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"fmt"
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"sync/atomic"
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"github.com/kataras/iris/v12"
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"github.com/kataras/iris/v12/mvc"
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)
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func main() {
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app := iris.New()
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mvc.New(app.Party("/")).Handle(&globalVisitorsController{visits: 0})
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// http://localhost:8080
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app.Listen(":8080")
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}
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type globalVisitorsController struct {
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// When a singleton controller is used then concurent safe access is up to the developers, because
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// all clients share the same controller instance instead.
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// Note that any controller's methods
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// are per-client, but the struct's field can be shared across multiple clients if the structure
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// does not have any dynamic struct field dependencies that depend on the iris.Context
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// and ALL field's values are NOT zero, at this case we use uint64 which it's no zero (even if we didn't set it
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// manually ease-of-understand reasons) because it's a value of &{0}.
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// All the above declares a Singleton, note that you don't have to write a single line of code to do this, Iris is smart enough.
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//
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// see `Get`.
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visits uint64
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}
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func (c *globalVisitorsController) Get() string {
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count := atomic.AddUint64(&c.visits, 1)
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return fmt.Sprintf("Total visitors: %d", count)
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}
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