frostfs-node/pkg/local_object_storage/blobstor/blobovniczatree/iterate.go

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package blobovniczatree
import (
"context"
"fmt"
"path/filepath"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobovnicza"
"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/local_object_storage/blobstor/common"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"git.frostfs.info/TrueCloudLab/hrw"
)
// Iterate iterates over all objects in b.
func (b *Blobovniczas) Iterate(_ context.Context, prm common.IteratePrm) (common.IterateRes, error) {
return common.IterateRes{}, b.iterateBlobovniczas(prm.IgnoreErrors, func(p string, blz *blobovnicza.Blobovnicza) error {
var subPrm blobovnicza.IteratePrm
subPrm.SetHandler(func(elem blobovnicza.IterationElement) error {
data, err := b.compression.Decompress(elem.ObjectData())
if err != nil {
if prm.IgnoreErrors {
if prm.ErrorHandler != nil {
return prm.ErrorHandler(elem.Address(), err)
}
return nil
}
return fmt.Errorf("could not decompress object data: %w", err)
}
if prm.Handler != nil {
return prm.Handler(common.IterationElement{
Address: elem.Address(),
ObjectData: data,
StorageID: []byte(p),
})
}
return prm.LazyHandler(elem.Address(), func() ([]byte, error) {
return data, err
})
})
subPrm.DecodeAddresses()
_, err := blz.Iterate(subPrm)
return err
})
}
// iterator over all Blobovniczas in unsorted order. Break on f's error return.
func (b *Blobovniczas) iterateBlobovniczas(ignoreErrors bool, f func(string, *blobovnicza.Blobovnicza) error) error {
return b.iterateLeaves(func(p string) (bool, error) {
blz, err := b.openBlobovnicza(p)
if err != nil {
if ignoreErrors {
return false, nil
}
return false, fmt.Errorf("could not open blobovnicza %s: %w", p, err)
}
err = f(p, blz)
return err != nil, err
})
}
// iterator over the paths of Blobovniczas sorted by weight.
func (b *Blobovniczas) iterateSortedLeaves(addr *oid.Address, f func(string) (bool, error)) error {
_, err := b.iterateSorted(
addr,
make([]string, 0, b.blzShallowDepth),
b.blzShallowDepth,
func(p []string) (bool, error) { return f(filepath.Join(p...)) },
)
return err
}
// iterator over directories with Blobovniczas sorted by weight.
func (b *Blobovniczas) iterateDeepest(addr oid.Address, f func(string) (bool, error)) error {
depth := b.blzShallowDepth
if depth > 0 {
depth--
}
_, err := b.iterateSorted(
&addr,
make([]string, 0, depth),
depth,
func(p []string) (bool, error) { return f(filepath.Join(p...)) },
)
return err
}
// iterator over particular level of directories.
func (b *Blobovniczas) iterateSorted(addr *oid.Address, curPath []string, execDepth uint64, f func([]string) (bool, error)) (bool, error) {
indices := indexSlice(b.blzShallowWidth)
hrw.SortSliceByValue(indices, addressHash(addr, filepath.Join(curPath...)))
exec := uint64(len(curPath)) == execDepth
for i := range indices {
if i == 0 {
curPath = append(curPath, u64ToHexString(indices[i]))
} else {
curPath[len(curPath)-1] = u64ToHexString(indices[i])
}
if exec {
if stop, err := f(curPath); err != nil {
return false, err
} else if stop {
return true, nil
}
} else if stop, err := b.iterateSorted(addr, curPath, execDepth, f); err != nil {
return false, err
} else if stop {
return true, nil
}
}
return false, nil
}
// iterator over the paths of Blobovniczas in random order.
func (b *Blobovniczas) iterateLeaves(f func(string) (bool, error)) error {
return b.iterateSortedLeaves(nil, f)
}
// makes slice of uint64 values from 0 to number-1.
func indexSlice(number uint64) []uint64 {
s := make([]uint64, number)
for i := range s {
s[i] = uint64(i)
}
return s
}