Vardhaman SuranaandGitHub
3fabf64b3c
* used manager's Add function in more places * exit when ctx.Done is received in archivePruner go routines * fix manager tests * fix data race * added more gpm function in manager and removed manager from a util function * closed unused channel and stopped ticker after context is done * added log statements * used context.Done inside function instead of stopper channel
76 lines
1.8 KiB
Go
76 lines
1.8 KiB
Go
package manager
|
|
|
|
import (
|
|
"context"
|
|
"sync"
|
|
"time"
|
|
|
|
k8sCache "k8s.io/client-go/tools/cache"
|
|
)
|
|
|
|
var _ Interface = &GroupManager{}
|
|
|
|
// Interface keeps track of the go routines in the system and can be used to gracefully shutdown the
|
|
// the system by waiting for completion of go routines added to it.
|
|
type Interface interface {
|
|
// Add will start a go routine for the given "function" and adds it to the list of go routines
|
|
// and will also remove the "function" from the list when it completes
|
|
Add(ctx context.Context, function func(context.Context))
|
|
|
|
AddInformers(ctx context.Context, informers map[string]k8sCache.SharedIndexInformer)
|
|
|
|
// Wait blocks the execution of the process until all the go routines in the manager are completed.
|
|
Wait()
|
|
|
|
// WaitWithTimeout blocks the execution of the process until timeout or till all all the go routines in the manager are completed
|
|
WaitWithTimeout(timeout time.Duration) error
|
|
}
|
|
|
|
type GroupManager struct {
|
|
wg sync.WaitGroup
|
|
}
|
|
|
|
func New() Interface {
|
|
return &GroupManager{
|
|
wg: sync.WaitGroup{},
|
|
}
|
|
}
|
|
func (g *GroupManager) Add(ctx context.Context, f func(context.Context)) {
|
|
g.wg.Add(1)
|
|
go func() {
|
|
defer g.wg.Done()
|
|
f(ctx)
|
|
}()
|
|
}
|
|
|
|
func (g *GroupManager) AddInformers(ctx context.Context, informers map[string]k8sCache.SharedIndexInformer) {
|
|
for _, informer := range informers {
|
|
informer := informer
|
|
g.Add(ctx, func(ctxArg context.Context) {
|
|
informer.Run(ctxArg.Done())
|
|
})
|
|
}
|
|
}
|
|
|
|
func (g *GroupManager) Wait() {
|
|
g.wg.Wait()
|
|
}
|
|
|
|
func (g *GroupManager) WaitWithTimeout(timeout time.Duration) error {
|
|
ctx, cancel := context.WithTimeout(context.Background(), timeout)
|
|
defer cancel()
|
|
|
|
done := make(chan struct{})
|
|
go func() {
|
|
g.wg.Wait()
|
|
close(done)
|
|
}()
|
|
|
|
select {
|
|
case <-ctx.Done():
|
|
return ctx.Err()
|
|
case <-done:
|
|
return nil
|
|
}
|
|
}
|