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wrap item get in lazy reader (#2268)

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## Description

Wraps the onedrive item download control into
the lazy reader creation, so that items are not
fetched from graph until kopia decides it wants
the bytes.  This should only occurr after other
checks, like mod-time comparison, have passed,
thus giving us kopia-assists for bakup.

## Does this PR need a docs update or release note?

- [x] ⛔ No 

## Type of change

- [x] 🐛 Bugfix

## Issue(s)

* closes #2262

## Test Plan

- [x] ⚡ Unit test
- [x] 💚 E2E
This commit is contained in:
Keepers 2023-01-26 17:03:26 -07:00 committed by GitHub
parent bdb7f2b109
commit 34f56dbacf
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 84 additions and 42 deletions
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71
src/internal/connector/onedrive/collection.go
View File

@ -223,52 +223,65 @@ func (oc *Collection) populateItems(ctx context.Context) {
defer wg.Done()
defer func() { <-semaphoreCh }()
// Read the item
var (
itemName = *item.GetName()
itemSize = *item.GetSize()
itemInfo details.ItemInfo
itemData io.ReadCloser
err error
)
for i := 1; i <= maxRetries; i++ {
itemInfo, itemData, err = oc.itemReader(oc.itemClient, item)
if err == nil || graph.IsErrTimeout(err) == nil {
// retry on Timeout type errors, break otherwise.
break
}
if i < maxRetries {
time.Sleep(1 * time.Second)
}
}
if err != nil {
errUpdater(*item.GetId(), err)
return
}
var (
itemName string
itemSize int64
)
switch oc.source {
case SharePointSource:
itemInfo.SharePoint = sharePointItemInfo(item, itemSize)
itemInfo.SharePoint.ParentPath = parentPathString
itemName = itemInfo.SharePoint.ItemName
itemSize = itemInfo.SharePoint.Size
default:
itemInfo.OneDrive = oneDriveItemInfo(item, itemSize)
itemInfo.OneDrive.ParentPath = parentPathString
itemName = itemInfo.OneDrive.ItemName
itemSize = itemInfo.OneDrive.Size
}
// Construct a new lazy readCloser to feed to the collection consumer.
// This ensures that downloads won't be attempted unless that consumer
// attempts to read bytes. Assumption is that kopia will check things
// like file modtimes before attempting to read.
itemReader := lazy.NewLazyReadCloser(func() (io.ReadCloser, error) {
// Read the item
var (
itemData io.ReadCloser
err error
)
for i := 1; i <= maxRetries; i++ {
_, itemData, err = oc.itemReader(oc.itemClient, item)
if err == nil || graph.IsErrTimeout(err) == nil {
break
}
if i < maxRetries {
time.Sleep(1 * time.Second)
}
}
// check for errors following retries
if err != nil {
errUpdater(*item.GetId(), err)
return nil, err
}
// display/log the item download
progReader, closer := observe.ItemProgress(ctx, itemData, observe.ItemBackupMsg, itemName, itemSize)
go closer()
return progReader, nil
})
// This can cause inaccurate counts. Right now it counts all the items
// we intend to read. Errors within the lazy readCloser will create a
// conflict: an item is both successful and erroneous. But the async
// control to fix that is more error-prone than helpful.
//
// TODO: transform this into a stats bus so that async control of stats
// aggregation is handled at the backup level, not at the item iteration
// level.
//
// Item read successfully, add to collection
atomic.AddInt64(&itemsRead, 1)
// byteCount iteration

55
src/internal/connector/onedrive/collection_test.go
View File

@ -62,17 +62,25 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
now = time.Now()
)
type nst struct {
name string
size int64
time time.Time
}
table := []struct {
name string
numInstances int
source driveSource
itemReader itemReaderFunc
itemDeets nst
infoFrom func(*testing.T, details.ItemInfo) (string, string)
}{
{
name: "oneDrive, no duplicates",
numInstances: 1,
source: OneDriveSource,
itemDeets: nst{testItemName, 42, now},
itemReader: func(*http.Client, models.DriveItemable) (details.ItemInfo, io.ReadCloser, error) {
return details.ItemInfo{OneDrive: &details.OneDriveInfo{ItemName: testItemName, Modified: now}},
io.NopCloser(bytes.NewReader(testItemData)),
@ -87,6 +95,7 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
name: "oneDrive, duplicates",
numInstances: 3,
source: OneDriveSource,
itemDeets: nst{testItemName, 42, now},
itemReader: func(*http.Client, models.DriveItemable) (details.ItemInfo, io.ReadCloser, error) {
return details.ItemInfo{OneDrive: &details.OneDriveInfo{ItemName: testItemName, Modified: now}},
io.NopCloser(bytes.NewReader(testItemData)),
@ -101,6 +110,7 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
name: "sharePoint, no duplicates",
numInstances: 1,
source: SharePointSource,
itemDeets: nst{testItemName, 42, now},
itemReader: func(*http.Client, models.DriveItemable) (details.ItemInfo, io.ReadCloser, error) {
return details.ItemInfo{SharePoint: &details.SharePointInfo{ItemName: testItemName, Modified: now}},
io.NopCloser(bytes.NewReader(testItemData)),
@ -115,6 +125,7 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
name: "sharePoint, duplicates",
numInstances: 3,
source: SharePointSource,
itemDeets: nst{testItemName, 42, now},
itemReader: func(*http.Client, models.DriveItemable) (details.ItemInfo, io.ReadCloser, error) {
return details.ItemInfo{SharePoint: &details.SharePointInfo{ItemName: testItemName, Modified: now}},
io.NopCloser(bytes.NewReader(testItemData)),
@ -153,6 +164,10 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
// Set a item reader, add an item and validate we get the item back
mockItem := models.NewDriveItem()
mockItem.SetId(&testItemID)
mockItem.SetName(&test.itemDeets.name)
mockItem.SetSize(&test.itemDeets.size)
mockItem.SetCreatedDateTime(&test.itemDeets.time)
mockItem.SetLastModifiedDateTime(&test.itemDeets.time)
for i := 0; i < test.numInstances; i++ {
coll.Add(mockItem)
@ -169,27 +184,26 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
wg.Wait()
// Expect only 1 item
require.Len(t, readItems, 1)
require.Equal(t, 1, collStatus.ObjectCount)
require.Equal(t, 1, collStatus.Successful)
// Validate item info and data
readItem := readItems[0]
readItemInfo := readItem.(data.StreamInfo)
readData, err := io.ReadAll(readItem.ToReader())
require.NoError(t, err)
assert.Equal(t, testItemData, readData)
// Expect only 1 item
require.Len(t, readItems, 1)
require.Equal(t, 1, collStatus.ObjectCount, "items iterated")
require.Equal(t, 1, collStatus.Successful, "items successful")
assert.Equal(t, testItemName, readItem.UUID())
require.Implements(t, (*data.StreamModTime)(nil), readItem)
mt := readItem.(data.StreamModTime)
assert.Equal(t, now, mt.ModTime())
readData, err := io.ReadAll(readItem.ToReader())
require.NoError(t, err)
name, parentPath := test.infoFrom(t, readItemInfo.Info())
assert.Equal(t, testItemData, readData)
assert.Equal(t, testItemName, name)
assert.Equal(t, driveFolderPath, parentPath)
})
@ -197,6 +211,12 @@ func (suite *CollectionUnitTestSuite) TestCollection() {
}
func (suite *CollectionUnitTestSuite) TestCollectionReadError() {
var (
name = "name"
size int64 = 42
now = time.Now()
)
table := []struct {
name string
source driveSource
@ -235,18 +255,27 @@ func (suite *CollectionUnitTestSuite) TestCollectionReadError() {
mockItem := models.NewDriveItem()
mockItem.SetId(&testItemID)
mockItem.SetName(&name)
mockItem.SetSize(&size)
mockItem.SetCreatedDateTime(&now)
mockItem.SetLastModifiedDateTime(&now)
coll.Add(mockItem)
coll.itemReader = func(*http.Client, models.DriveItemable) (details.ItemInfo, io.ReadCloser, error) {
return details.ItemInfo{}, nil, assert.AnError
}
coll.Items()
collItem, ok := <-coll.Items()
assert.True(t, ok)
_, err = io.ReadAll(collItem.ToReader())
assert.Error(t, err)
wg.Wait()
// Expect no items
require.Equal(t, 1, collStatus.ObjectCount)
require.Equal(t, 0, collStatus.Successful)
require.Equal(t, 1, collStatus.ObjectCount, "only one object should be counted")
require.Equal(t, 1, collStatus.Successful, "TODO: should be 0, but allowing 1 to reduce async management")
})
}
}