Brother Lian Blockchain training share go language concurrency timeout processing

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Golang does not provide time-outs at the language level, but it can be timed out with some small tricks.

Principle:

Concurrent a function, waiting for 1s to write data to timeout, in the Select if there is data in the 1s to the other channel write will be executed smoothly, if not, this is timeout write data, we know the timeout.

Package Main

Import "FMT"

Import "Time"

Func Main () {

CH: = Make (chan int, 1)

Timeout: = Make (chan bool, 1)

Executes a function concurrently, waiting for 1s to write to timeout to true

Go func () {

Time. Sleep (1000)

Timeout <-True

}()

This will wait for CH or timeout to read the data

Because no data has been written to Ch

Data is written to timeout after 1s

So the case of timeout was executed.

Use this technique to implement a timeout operation

Select {

Case <-Ch:

Fmt. Println ("read from ch")

Case <-Timeout:

Fmt. Println ("Time Out ...")

}

}