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pooler.go
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pooler.go
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package pooler
import (
"context"
"fmt"
"route-sync/route"
"sync"
"time"
"code.cloudfoundry.org/lager"
)
//go:generate counterfeiter . Pooler
// Pooler is responsible for querying a route.Source and updating a route.Router
type Pooler interface {
Run(context.Context, route.Source, route.Router)
}
type timeBased struct {
sync.Mutex
interval time.Duration
logger lager.Logger
}
// ByTime returns a Pooler that refreshes every interval
func ByTime(interval time.Duration, logger lager.Logger) Pooler {
return &timeBased{interval: interval, logger: logger}
}
func (tb *timeBased) tick(src route.Source, router route.Router) {
tcpRoutes, err := src.TCP()
if err != nil {
tb.logger.Fatal("fetching TCP routes", err)
}
err = router.TCP(tcpRoutes)
if err != nil {
tb.logger.Fatal("posting TCP routes", err)
}
httpRoutes, err := src.HTTP()
if err != nil {
tb.logger.Fatal("fetching HTTP routes", err)
}
err = router.HTTP(httpRoutes)
if err != nil {
tb.logger.Fatal("posting HTTP routes", err)
}
tb.logger.Info("registered routes", lager.Data{
"TCP": fmt.Sprintf("%q", tcpRoutes),
"HTTP": fmt.Sprintf("%q", httpRoutes),
})
}
func (tb *timeBased) Run(ctx context.Context, src route.Source, router route.Router) {
ticker := time.NewTicker(tb.interval)
defer ticker.Stop()
tb.tick(src, router)
for {
select {
case <-ctx.Done():
return
case <-ticker.C:
tb.tick(src, router)
}
}
}