| # concurrent |
| |
| [](https://sourcegraph.com/github.com/modern-go/concurrent?badge) |
| [](http://godoc.org/github.com/modern-go/concurrent) |
| [](https://travis-ci.org/modern-go/concurrent) |
| [](https://codecov.io/gh/modern-go/concurrent) |
| [](https://goreportcard.com/report/github.com/modern-go/concurrent) |
| [](https://raw.githubusercontent.com/modern-go/concurrent/master/LICENSE) |
| |
| * 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 |
| |
| ```go |
| m := concurrent.NewMap() |
| m.Store("hello", "world") |
| elem, found := m.Load("hello") |
| // elem will be "world" |
| // found will be true |
| ``` |
| |
| # concurrent.Executor |
| |
| ```go |
| 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 |
