//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import (
	"context"
	"errors"
	"strings"
	"time"

	jsoniter "github.com/json-iterator/go"
	"github.com/minio/minio/internal/cachevalue"
)

const (
	dataUsageRoot   = SlashSeparator
	dataUsageBucket = minioMetaBucket + SlashSeparator + bucketMetaPrefix

// getModTime will return the ModTime of the underlying version.
func (j xlMetaV2Version) getModTime() time.Time {
	switch j.Type {
	case ObjectType:
		return time.Unix(0, j.ObjectV2.ModTime)
	case DeleteType:
		return time.Unix(0, j.DeleteMarker.ModTime)
	case LegacyType:
		return j.ObjectV1.Stat.ModTime
	}
	return time.Time{}
}

// getVersionID will return the versionID of the underlying version.

//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package cmd

import "time"

const (
	peerRESTVersion       = "v39" // add more flags to speedtest API
	peerRESTVersionPrefix = SlashSeparator + peerRESTVersion
	peerRESTPrefix        = minioReservedBucketPath + "/peer"

	if !n.Valid {
		return nil, nil
	}
	return n.Time, nil
}

func (n DeletedAt) MarshalJSON() ([]byte, error) {
	if n.Valid {
		return json.Marshal(n.Time)
	}
	return json.Marshal(nil)
}

func (n *DeletedAt) UnmarshalJSON(b []byte) error {
	if string(b) == "null" {
		n.Valid = false
		return nil
	}
	err := json.Unmarshal(b, &n.Time)
	if err == nil {
		n.Valid = true
	}
	return err
}

func (sys *BucketQuotaSys) Init(objAPI ObjectLayer) {
	bucketStorageCache.InitOnce(10*time.Second,
		cachevalue.Opts{ReturnLastGood: true, NoWait: true},
		func(ctx context.Context) (DataUsageInfo, error) {
			if objAPI == nil {
				return DataUsageInfo{}, errServerNotInitialized
			}
			ctx, done := context.WithTimeout(ctx, 2*time.Second)
			defer done()

			return loadDataUsageFromBackend(ctx, objAPI)
		},
	)
}

* Each application that you have running on your computer has some process behind it, each running program, each window, etc. And there are normally many processes running **at the same time** while a computer is on.
* There can be **multiple processes** of the **same program** running at the same time.

If you check out the "task manager" or "system monitor" (or similar tools) in your operating system, you will be able to see many of those processes running.

	pools := obj.(*erasureServerPools)
	t := time.Now()
	for _, pool := range pools.serverPools {
		for _, sets := range pool.erasureDisks {
			for _, s := range sets {
				if !s.IsLocal() {
					for {
						if s.IsOnline() {
							break
						}
						time.Sleep(100 * time.Millisecond)
						if time.Since(t) > 10*time.Second {

	}
}

// DeadlineWorker implements the deadline/timeout resiliency pattern.
type DeadlineWorker struct {
	timeout time.Duration
}

// NewDeadlineWorker constructs a new DeadlineWorker with the given timeout.
// To return values, use the WithDeadline helper instead.
func NewDeadlineWorker(timeout time.Duration) *DeadlineWorker {
	dw := &DeadlineWorker{
		timeout: timeout,
	}
	return dw
}

// unless that metadata is needed in order to allow a subsequent data retrieval
// to  be  correctly  handled.   For example, changes to st_atime or st_mtime
// (respectively, time of last access and time of last modification; see inode(7))
// do not require flushing because they are not necessary for a subsequent data
// read to be handled correctly. On the other hand, a change to the file size

	close(target.quitCh)
	if target.updateStmt != nil {
		// FIXME: log returned error. ignore time being.
		_ = target.updateStmt.Close()
	}

	if target.deleteStmt != nil {
		// FIXME: log returned error. ignore time being.
		_ = target.deleteStmt.Close()
	}

	if target.insertStmt != nil {
		// FIXME: log returned error. ignore time being.
		_ = target.insertStmt.Close()
	}

	if target.db != nil {