Files
node-problem-detector/vendor/github.com/modern-go/concurrent/README.md
Xuewei Zhang 3fc6c7f306 Add vendor code for Boskos
Added replace statement for apache/thrift, since it has been recently
moved from git.apache.org/thrift.git to github.com/apache/thrift, and is
causing `go get` to fail.

See https://github.com/jenkins-x/jx/pull/3321 for more detail.

Commands used:
GO111MODULE=on go get k8s.io/test-infra/boskos/client
GO111MODULE=on go mod vendor
2019-09-14 15:22:09 -07:00

1.8 KiB

concurrent

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  • concurrent.Map: backport sync.Map for go below 1.9
  • concurrent.Executor: goroutine with explicit ownership and cancellable

concurrent.Map

because sync.Map is only available in go 1.9, we can use concurrent.Map to make code portable

m := concurrent.NewMap()
m.Store("hello", "world")
elem, found := m.Load("hello")
// elem will be "world"
// found will be true

concurrent.Executor

executor := concurrent.NewUnboundedExecutor()
executor.Go(func(ctx context.Context) {
    everyMillisecond := time.NewTicker(time.Millisecond)
    for {
        select {
        case <-ctx.Done():
            fmt.Println("goroutine exited")
            return
        case <-everyMillisecond.C:
            // do something
        }
    }
})
time.Sleep(time.Second)
executor.StopAndWaitForever()
fmt.Println("executor stopped")

attach goroutine to executor instance, so that we can

  • cancel it by stop the executor with Stop/StopAndWait/StopAndWaitForever
  • handle panic by callback: the default behavior will no longer crash your application