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paginate through large directories

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This commit is contained in:
Chris Lu 2020-12-09 23:23:38 -08:00
parent 02a160c3fd
commit 97c942b5ee
1 changed files with 21 additions and 4 deletions
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25
weed/pb/filer_pb/filer_client.go
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@ -5,7 +5,6 @@ import (
"errors"
"fmt"
"io"
"math"
"os"
"strings"
"time"
@ -61,14 +60,32 @@ type EachEntryFunciton func(entry *Entry, isLast bool) error
func ReadDirAllEntries(filerClient FilerClient, fullDirPath util.FullPath, prefix string, fn EachEntryFunciton) (err error) {
return doList(filerClient, fullDirPath, prefix, fn, "", false, math.MaxUint32)
var counter uint32
var startFrom string
var counterFunc = func(entry *Entry, isLast bool) error {
counter++
startFrom = entry.Name
return fn(entry, isLast)
}
var paginationLimit uint32 = 10000
if err = doList(filerClient, fullDirPath, prefix, counterFunc, "", false, paginationLimit); err != nil {
return err
}
for counter == paginationLimit {
counter = 0
if err = doList(filerClient, fullDirPath, prefix, counterFunc, startFrom, false, paginationLimit); err != nil {
return err
}
}
return nil
}
func List(filerClient FilerClient, parentDirectoryPath, prefix string, fn EachEntryFunciton, startFrom string, inclusive bool, limit uint32) (err error) {
return doList(filerClient, util.FullPath(parentDirectoryPath), prefix, fn, startFrom, inclusive, limit)
}
func doList(filerClient FilerClient, fullDirPath util.FullPath, prefix string, fn EachEntryFunciton, startFrom string, inclusive bool, limit uint32) (err error) {