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tick.go
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tick.go
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package storage
import (
"context"
"errors"
"time"
"github.com/m3db/m3/src/x/clock"
xerrors "github.com/m3db/m3/src/x/errors"
"github.com/uber-go/tally"
)
type databaseTickManager interface {
// Tick performs a tick against the database.
Tick() error
}
var (
errEmptyNamespaces = errors.New("empty namespaces")
errTickInProgress = errors.New("another tick is in progress")
)
type tickManagerMetrics struct {
tickWorkDuration tally.Timer
}
func newTickManagerMetrics(scope tally.Scope) tickManagerMetrics {
return tickManagerMetrics{
tickWorkDuration: scope.Timer("work-duration"),
}
}
type tickManager struct {
database database
opts *Options
nowFn clock.NowFn
sleepFn sleepFn
metrics tickManagerMetrics
}
func newTickManager(database database, opts *Options) databaseTickManager {
return &tickManager{
database: database,
opts: opts,
nowFn: opts.ClockOptions().NowFn(),
sleepFn: time.Sleep,
metrics: newTickManagerMetrics(opts.InstrumentOptions().MetricsScope()),
}
}
func (mgr *tickManager) Tick() error {
namespaces, err := mgr.database.GetOwnedNamespaces()
if err != nil {
return err
}
if len(namespaces) == 0 {
return errEmptyNamespaces
}
var (
start = mgr.nowFn()
multiErr xerrors.MultiError
)
for _, n := range namespaces {
// TODO(xichen): Set up timeout and cancellation logic.
multiErr = multiErr.Add(n.Tick(context.Background()))
}
took := mgr.nowFn().Sub(start)
mgr.metrics.tickWorkDuration.Record(took)
tickMinInterval := mgr.opts.TickMinInterval()
if took >= tickMinInterval {
return nil
}
mgr.sleepFn(tickMinInterval - took)
return multiErr.FinalError()
}