event/example_test.go


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package event

import "fmt"

func ExampleTypeMux() {
    type someEvent struct{ I int }
    type otherEvent struct{ S string }
    type yetAnotherEvent struct{ X, Y int }

    var mux TypeMux

    // Start a subscriber.
    done := make(chan struct{})
    sub := mux.Subscribe(someEvent{}, otherEvent{})
    go func() {
        for event := range sub.Chan() {
            fmt.Printf("Received: %#v\n", event)
        }
        fmt.Println("done")
        close(done)
    }()

    // Post some events.
    mux.Post(someEvent{5})
    mux.Post(yetAnotherEvent{X: 3, Y: 4})
    mux.Post(someEvent{6})
    mux.Post(otherEvent{"whoa"})

    // Stop closes all subscription channels.
    // The subscriber goroutine will print "done"
    // and exit.
    mux.Stop()

    // Wait for subscriber to return.
    <-done

    // Output:
    // Received: event.someEvent{I:5}
    // Received: event.someEvent{I:6}
    // Received: event.otherEvent{S:"whoa"}
    // done
}