alibaba-cloud-sdk-go/docs/9-Asynchronous-EN.md

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Asynchronous Call

Make an asynchronous call

Alibaba Cloud Go SDK supports asynchronous calls in two ways：

1. Using channel as return values

   responseChannel, errChannel := client.FooWithChan(request)
   
   // this will block
   response := <-responseChannel
   err = <-errChannel
   

   1. Use callback to control the callback

   blocker := client.FooWithCallback(request, func(response *FooResponse, err error) {
       // handle the response and err
   })
   
   // blocker which is type of (chan int)，is used to control synchronization，when returning 1 means success，and returning 0 means failure.
   // When <-blocker returns failure，err also will be handled by afferent callback.
   result := <-blocker
   

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