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package suture
import (
"context"
"fmt"
)
type Incrementor struct {
current int
next chan int
stop chan bool
}
func (i *Incrementor) Stop() {
fmt.Println("Stopping the service")
i.stop <- true
}
func (i *Incrementor) Serve(ctx context.Context) error {
for {
select {
case i.next <- i.current:
i.current++
case <-ctx.Done():
// This message on i.stop is just to synchronize
// this test with the example code so the output is
// consistent for the test code; most services
// would just "return nil" here.
fmt.Println("Stopping the service")
i.stop <- true
return nil
}
}
}
func ExampleNew_simple() {
supervisor := NewSimple("Supervisor")
service := &Incrementor{0, make(chan int), make(chan bool)}
supervisor.Add(service)
ctx, cancel := context.WithCancel(context.Background())
supervisor.ServeBackground(ctx)
fmt.Println("Got:", <-service.next)
fmt.Println("Got:", <-service.next)
cancel()
// We sync here just to guarantee the output of "Stopping the service"
<-service.stop
// Output:
// Got: 0
// Got: 1
// Stopping the service
}
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