README.md (1893B)
1 # concurrent 2 3 [](https://sourcegraph.com/github.com/modern-go/concurrent?badge) 4 [](http://godoc.org/github.com/modern-go/concurrent) 5 [](https://travis-ci.org/modern-go/concurrent) 6 [](https://codecov.io/gh/modern-go/concurrent) 7 [](https://goreportcard.com/report/github.com/modern-go/concurrent) 8 [](https://raw.githubusercontent.com/modern-go/concurrent/master/LICENSE) 9 10 * concurrent.Map: backport sync.Map for go below 1.9 11 * concurrent.Executor: goroutine with explicit ownership and cancellable 12 13 # concurrent.Map 14 15 because sync.Map is only available in go 1.9, we can use concurrent.Map to make code portable 16 17 ```go 18 m := concurrent.NewMap() 19 m.Store("hello", "world") 20 elem, found := m.Load("hello") 21 // elem will be "world" 22 // found will be true 23 ``` 24 25 # concurrent.Executor 26 27 ```go 28 executor := concurrent.NewUnboundedExecutor() 29 executor.Go(func(ctx context.Context) { 30 everyMillisecond := time.NewTicker(time.Millisecond) 31 for { 32 select { 33 case <-ctx.Done(): 34 fmt.Println("goroutine exited") 35 return 36 case <-everyMillisecond.C: 37 // do something 38 } 39 } 40 }) 41 time.Sleep(time.Second) 42 executor.StopAndWaitForever() 43 fmt.Println("executor stopped") 44 ``` 45 46 attach goroutine to executor instance, so that we can 47 48 * cancel it by stop the executor with Stop/StopAndWait/StopAndWaitForever 49 * handle panic by callback: the default behavior will no longer crash your application