frostfs-node/pkg/services/policer/queue.go

package policer

import (
	"github.com/nspcc-dev/neofs-api-go/pkg/object"
	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/engine"
)

type jobQueue struct {
	localStorage *engine.StorageEngine
}

var jobFilter object.SearchFilters

func (q *jobQueue) Select(limit int) ([]*object.Address, error) {
	// TODO: optimize the logic for selecting objects
	// We can prioritize objects for migration, newly arrived objects, etc.
	// It is recommended to make changes after updating the metabase

	// FIXME: add the ability to limit Select result
	res, err := engine.Select(q.localStorage, getJobFilter())
	if err != nil {
		return nil, err
	}

	if len(res) < limit {
		return res, nil
	}

	return res[:limit], nil
}

// getJobFilter is a getter for a singleton instance.
func getJobFilter() object.SearchFilters {
	if len(jobFilter) == 0 {
		jobFilter.AddPhyFilter() // this initiates a list of filters
	}

	return jobFilter
}