7 "git.curoverse.com/arvados.git/sdk/go/arvados"
10 func countCollections(c *arvados.Client, params arvados.ResourceListParams) (int, error) {
11 var page arvados.CollectionList
15 err := c.RequestAndDecode(&page, "GET", "arvados/v1/collections", nil, params)
16 return page.ItemsAvailable, err
19 // EachCollection calls f once for every readable
20 // collection. EachCollection stops if it encounters an error, such as
21 // f returning a non-nil error.
23 // The progress function is called periodically with done (number of
24 // times f has been called) and total (number of times f is expected
27 // If pageSize > 0 it is used as the maximum page size in each API
28 // call; otherwise the maximum allowed page size is requested.
29 func EachCollection(c *arvados.Client, pageSize int, f func(arvados.Collection) error, progress func(done, total int)) error {
31 progress = func(_, _ int) {}
34 expectCount, err := countCollections(c, arvados.ResourceListParams{})
41 // Use the maximum page size the server allows
44 params := arvados.ResourceListParams{
46 Order: "modified_at, uuid",
48 Select: []string{"uuid", "manifest_text", "modified_at", "portable_data_hash", "replication_desired"},
50 var last arvados.Collection
51 var filterTime time.Time
54 progress(callCount, expectCount)
55 var page arvados.CollectionList
56 err := c.RequestAndDecode(&page, "GET", "arvados/v1/collections", nil, params)
60 for _, coll := range page.Items {
61 if last.ModifiedAt != nil && *last.ModifiedAt == *coll.ModifiedAt && last.UUID >= coll.UUID {
71 if last.ModifiedAt == nil || *last.ModifiedAt == filterTime {
72 if page.ItemsAvailable > len(page.Items) {
73 // TODO: use "mtime=X && UUID>Y"
74 // filters to get all collections with
75 // this timestamp, then use "mtime>X"
76 // to get the next timestamp.
77 return fmt.Errorf("BUG: Received an entire page with the same modified_at timestamp (%v), cannot make progress", filterTime)
81 filterTime = *last.ModifiedAt
82 params.Filters = []arvados.Filter{{
92 progress(callCount, expectCount)
94 if checkCount, err := countCollections(c, arvados.ResourceListParams{Filters: []arvados.Filter{{
97 Operand: filterTime}}}); err != nil {
99 } else if callCount < checkCount {
100 return fmt.Errorf("Retrieved %d collections with modtime <= T=%q, but server now reports there are %d collections with modtime <= T", callCount, filterTime, checkCount)