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package main
import (
"context"
"log"
"sync"
"time"
)
type executionUnit struct {
name string
check check
}
func execute(config config, state state) state {
limiterCh := make(chan struct{}, config.CheckConcurrency)
executionCh := make(chan executionUnit)
resultCh := make(chan checkResult)
go func() {
for name, check := range config.Checks {
executionCh <- executionUnit{name, check}
}
close(executionCh)
}()
var resultWg sync.WaitGroup
resultWg.Add(1)
go func() {
for checkResult := range resultCh {
state.update(checkResult)
}
resultWg.Done()
}()
var executionWg sync.WaitGroup
executionWg.Add(len(config.Checks))
for executionUnit := range executionCh {
go func(name string, check check) {
limiterCh <- struct{}{}
defer func() {
<-limiterCh
executionWg.Done()
}()
ctx, cancel := context.WithTimeout(context.Background(),
time.Duration(config.CheckTimeoutS)*time.Second)
defer cancel()
resultCh <- check.execute(ctx, name)
}(executionUnit.name, executionUnit.check)
}
executionWg.Wait()
log.Println("All checks completed!")
close(resultCh)
resultWg.Wait()
log.Println("All results collected!")
return state
}
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