forked from TrueCloudLab/xk6-frostfs
124 lines
2.4 KiB
Go
124 lines
2.4 KiB
Go
package registry
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import (
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"fmt"
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"os"
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)
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type ObjExporter struct {
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selector *ObjSelector
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}
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type PreGenerateInfo struct {
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Buckets []string `json:"buckets"`
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Containers []string `json:"containers"`
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Objects []ObjInfo `json:"objects"`
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ObjSize string `json:"obj_size"`
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}
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type ObjInfo struct {
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Bucket string `json:"bucket"`
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Object string `json:"object"`
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CID string `json:"cid"`
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OID string `json:"oid"`
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}
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func NewObjExporter(selector *ObjSelector) *ObjExporter {
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return &ObjExporter{selector: selector}
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}
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func (o *ObjExporter) ExportJSONPreGen(fileName string) error {
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f, err := os.Create(fileName)
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if err != nil {
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return err
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}
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defer f.Close()
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// there can be a lot of object, so manually form json
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if _, err = f.WriteString(`{"objects":[`); err != nil {
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return err
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}
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bucketMap := make(map[string]struct{})
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containerMap := make(map[string]struct{})
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count, err := o.selector.Count()
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if err != nil {
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return err
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}
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var comma string
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for i := 0; i < count; i++ {
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info := o.selector.NextObject()
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if info == nil {
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break
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}
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if err = writeObjectInfo(comma, info, f); err != nil {
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return err
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}
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if i == 0 {
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comma = ","
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}
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if info.S3Bucket != "" {
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bucketMap[info.S3Bucket] = struct{}{}
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}
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if info.CID != "" {
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containerMap[info.CID] = struct{}{}
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}
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}
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if _, err = f.WriteString(`]`); err != nil {
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return err
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}
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if len(bucketMap) > 0 {
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if err = writeContainerInfo("buckets", bucketMap, f); err != nil {
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return err
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}
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}
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if len(containerMap) > 0 {
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if err = writeContainerInfo("containers", containerMap, f); err != nil {
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return err
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}
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}
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if _, err = f.WriteString(`}`); err != nil {
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return err
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}
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return nil
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}
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func writeObjectInfo(comma string, info *ObjectInfo, f *os.File) (err error) {
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var res string
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if info.S3Bucket != "" || info.S3Key != "" {
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res = fmt.Sprintf(`%s{"bucket":"%s","object":"%s"}`, comma, info.S3Bucket, info.S3Key)
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} else {
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res = fmt.Sprintf(`%s{"cid":"%s","oid":"%s"}`, comma, info.CID, info.OID)
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}
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_, err = f.WriteString(res)
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return err
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}
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func writeContainerInfo(attrName string, bucketMap map[string]struct{}, f *os.File) (err error) {
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if _, err = f.WriteString(fmt.Sprintf(`,"%s":[`, attrName)); err != nil {
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return err
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}
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i := 0
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comma := ""
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for bucket := range bucketMap {
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if _, err = f.WriteString(fmt.Sprintf(`%s"%s"`, comma, bucket)); err != nil {
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return err
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}
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if i == 0 {
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comma = ","
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}
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i++
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}
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_, err = f.WriteString(`]`)
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return err
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}
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