mirror of
https://github.com/ipfs/kubo.git
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Query for provider head/tail
License: MIT Signed-off-by: Michael Avila <davidmichaelavila@gmail.com>
This commit is contained in:
Michael Avila
Steven Allen
parent
8c96e3be90
commit
fca85a2bdd
4
go.mod
4
go.mod
@ -20,10 +20,10 @@ require (
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github.com/ipfs/go-blockservice v0.0.3
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github.com/ipfs/go-cid v0.0.1
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github.com/ipfs/go-cidutil v0.0.1
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github.com/ipfs/go-datastore v0.0.1
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github.com/ipfs/go-datastore v0.0.2
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github.com/ipfs/go-detect-race v0.0.1
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github.com/ipfs/go-ds-badger v0.0.2
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github.com/ipfs/go-ds-flatfs v0.0.1
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github.com/ipfs/go-ds-flatfs v0.0.2
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github.com/ipfs/go-ds-leveldb v0.0.1
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github.com/ipfs/go-ds-measure v0.0.1
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github.com/ipfs/go-fs-lock v0.0.1
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10
go.sum
10
go.sum
@ -121,12 +121,14 @@ github.com/ipfs/go-cidutil v0.0.1 h1:UpDQI2LrihqOGY2mHaMhjrhh1DJ14N/58BQb7lKXvlQ
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github.com/ipfs/go-cidutil v0.0.1/go.mod h1:/0H649ymJksNEZvBAkM18HIctk7tkONH9tspTeLok48=
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github.com/ipfs/go-datastore v0.0.1 h1:AW/KZCScnBWlSb5JbnEnLKFWXL224LBEh/9KXXOrUms=
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github.com/ipfs/go-datastore v0.0.1/go.mod h1:d4KVXhMt913cLBEI/PXAy6ko+W7e9AhyAKBGh803qeE=
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github.com/ipfs/go-datastore v0.0.2 h1:Blyjq95atbxmCHSaDt42phIhf9NGLflzwq/95FqsNs0=
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github.com/ipfs/go-datastore v0.0.2/go.mod h1:d4KVXhMt913cLBEI/PXAy6ko+W7e9AhyAKBGh803qeE=
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github.com/ipfs/go-detect-race v0.0.1 h1:qX/xay2W3E4Q1U7d9lNs1sU9nvguX0a7319XbyQ6cOk=
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github.com/ipfs/go-detect-race v0.0.1/go.mod h1:8BNT7shDZPo99Q74BpGMK+4D8Mn4j46UU0LZ723meps=
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github.com/ipfs/go-ds-badger v0.0.2 h1:7ToQt7QByBhOTuZF2USMv+PGlMcBC7FW7FdgQ4FCsoo=
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github.com/ipfs/go-ds-badger v0.0.2/go.mod h1:Y3QpeSFWQf6MopLTiZD+VT6IC1yZqaGmjvRcKeSGij8=
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github.com/ipfs/go-ds-flatfs v0.0.1 h1:yqWwRYFOGNClUL7V2jvcx4KMMso1Jv+pgQzsv9/gWBs=
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github.com/ipfs/go-ds-flatfs v0.0.1/go.mod h1:YsMGWjUieue+smePAWeH/YhHtlmEMnEGhiwIn6K6rEM=
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github.com/ipfs/go-ds-flatfs v0.0.2 h1:1zujtU5bPBH6B8roE+TknKIbBCrpau865xUk0dH3x2A=
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github.com/ipfs/go-ds-flatfs v0.0.2/go.mod h1:YsMGWjUieue+smePAWeH/YhHtlmEMnEGhiwIn6K6rEM=
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github.com/ipfs/go-ds-leveldb v0.0.1 h1:Z0lsTFciec9qYsyngAw1f/czhRU35qBLR2vhavPFgqA=
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github.com/ipfs/go-ds-leveldb v0.0.1/go.mod h1:feO8V3kubwsEF22n0YRQCffeb79OOYIykR4L04tMOYc=
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github.com/ipfs/go-ds-measure v0.0.1 h1:PrCueug+yZLkDCOthZTXKinuoCal/GvlAT7cNxzr03g=
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@ -143,8 +145,6 @@ github.com/ipfs/go-ipfs-chunker v0.0.1 h1:cHUUxKFQ99pozdahi+uSC/3Y6HeRpi9oTeUHbE
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github.com/ipfs/go-ipfs-chunker v0.0.1/go.mod h1:tWewYK0we3+rMbOh7pPFGDyypCtvGcBFymgY4rSDLAw=
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github.com/ipfs/go-ipfs-cmdkit v0.0.1 h1:X6YXEAjUljTzevE6DPUKXSqcgf+4FXzcn5B957F5MXo=
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github.com/ipfs/go-ipfs-cmdkit v0.0.1/go.mod h1:9FtbMdUabcSqv/G4/8WCxSLxkZxn/aZEFrxxqnVcRbg=
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github.com/ipfs/go-ipfs-cmds v0.0.3 h1:QvNUE8lslNQghxXf6vzV1ZoMQCDDAtKG8f2oINiRew4=
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github.com/ipfs/go-ipfs-cmds v0.0.3/go.mod h1:1QVgxSgenZvOMGVC/XUTC7tJxRBGPLxYvpgPpCi3DUk=
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github.com/ipfs/go-ipfs-cmds v0.0.4 h1:Iq4I8irWw5TmHe/4pjSyYJLbYkkdMOgHVe8ofJmPa4k=
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github.com/ipfs/go-ipfs-cmds v0.0.4/go.mod h1:1QVgxSgenZvOMGVC/XUTC7tJxRBGPLxYvpgPpCi3DUk=
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github.com/ipfs/go-ipfs-config v0.0.1 h1:6ED08emzI1imdsAjixFi2pEyZxTVD5ECKtCOxLBx+Uc=
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@ -220,8 +220,6 @@ github.com/jbenet/go-cienv v0.0.0-20150120210510-1bb1476777ec h1:DQqZhhDvrTrEQ3Q
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github.com/jbenet/go-cienv v0.0.0-20150120210510-1bb1476777ec/go.mod h1:rGaEvXB4uRSZMmzKNLoXvTu1sfx+1kv/DojUlPrSZGs=
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github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
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github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
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github.com/jbenet/go-is-domain v0.0.0-20160119110217-ba9815c809e0 h1:qxMncUW0TzViA3REiN3/YgVOoekVtUtEY0O/j/Qlctg=
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github.com/jbenet/go-is-domain v0.0.0-20160119110217-ba9815c809e0/go.mod h1:I9DYFcJAixF5f9iOu/9oC451/bq+QDTaLGznkcJPWgg=
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github.com/jbenet/go-is-domain v1.0.2 h1:11r5MSptcNFZyBoqubBQnVMUKRWLuRjL1banaIk+iYo=
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github.com/jbenet/go-is-domain v1.0.2/go.mod h1:xbRLRb0S7FgzDBTJlguhDVwLYM/5yNtvktxj2Ttfy7Q=
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github.com/jbenet/go-random v0.0.0-20190219211222-123a90aedc0c h1:uUx61FiAa1GI6ZmVd2wf2vULeQZIKG66eybjNXKYCz4=
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@ -2,7 +2,7 @@ package provider
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import (
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"context"
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"math"
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"fmt"
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"strconv"
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"strings"
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@ -32,7 +32,7 @@ type Queue struct {
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// NewQueue creates a queue for cids
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func NewQueue(ctx context.Context, name string, ds datastore.Datastore) (*Queue, error) {
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namespaced := namespace.Wrap(ds, datastore.NewKey("/"+name+"/queue/"))
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head, tail, err := getQueueHeadTail(ctx, name, namespaced)
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head, tail, err := getQueueHeadTail(ctx, namespaced)
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if err != nil {
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return nil, err
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}
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@ -142,40 +142,52 @@ func (q *Queue) work() {
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}
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func (q *Queue) queueKey(id uint64) datastore.Key {
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return datastore.NewKey(strconv.FormatUint(id, 10))
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s := fmt.Sprintf("%016X", id)
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return datastore.NewKey(s)
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}
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// crawl over the queue entries to find the head and tail
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func getQueueHeadTail(ctx context.Context, name string, datastore datastore.Datastore) (uint64, uint64, error) {
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q := query.Query{}
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results, err := datastore.Query(q)
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func getQueueHeadTail(ctx context.Context, datastore datastore.Datastore) (uint64, uint64, error) {
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head, err := getQueueHead(datastore)
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if err != nil {
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return 0, 0, err
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}
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var tail uint64
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var head uint64 = math.MaxUint64
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for entry := range results.Next() {
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trimmed := strings.TrimPrefix(entry.Key, "/")
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id, err := strconv.ParseUint(trimmed, 10, 64)
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if err != nil {
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return 0, 0, err
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}
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if id < head {
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head = id
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}
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if (id + 1) > tail {
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tail = (id + 1)
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}
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}
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if err := results.Close(); err != nil {
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tail, err := getQueueTail(datastore)
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if err != nil {
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return 0, 0, err
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}
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if head == math.MaxUint64 {
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head = 0
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}
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return head, tail, nil
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}
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func getQueueHead(ds datastore.Datastore) (uint64, error) {
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return getFirstIDByOrder(ds, query.OrderByKey{})
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}
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func getQueueTail(ds datastore.Datastore) (uint64, error) {
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tail, err := getFirstIDByOrder(ds, query.OrderByKeyDescending{})
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if err != nil {
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return 0, err
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}
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if tail > 0 {
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tail++
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}
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return tail, nil
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}
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func getFirstIDByOrder(ds datastore.Datastore, order query.Order) (uint64, error) {
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q := query.Query{Orders: []query.Order{order}}
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results, err := ds.Query(q)
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if err != nil {
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return 0, err
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}
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defer results.Close()
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r, ok := results.NextSync()
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if !ok {
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return 0, nil
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}
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trimmed := strings.TrimPrefix(r.Key, "/")
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id, err := strconv.ParseUint(trimmed, 16, 64)
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if err != nil {
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return 0, err
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}
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return id, nil
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}
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@ -12,7 +12,7 @@ import (
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func makeCids(n int) []cid.Cid {
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cids := make([]cid.Cid, 0, n)
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for i := 0; i < 10; i++ {
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for i := 0; i < n; i++ {
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c := blockGenerator.Next().Cid()
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cids = append(cids, c)
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}
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@ -129,3 +129,27 @@ func TestInitialization(t *testing.T) {
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assertOrdered(cids[5:], queue, t)
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}
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func TestInitializationWithManyCids(t *testing.T) {
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ctx := context.Background()
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defer ctx.Done()
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ds := sync.MutexWrap(datastore.NewMapDatastore())
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queue, err := NewQueue(ctx, "test", ds)
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if err != nil {
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t.Fatal(err)
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}
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cids := makeCids(25)
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for _, c := range cids {
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queue.Enqueue(c)
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}
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// make a new queue, same data
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queue, err = NewQueue(ctx, "test", ds)
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if err != nil {
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t.Fatal(err)
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}
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assertOrdered(cids, queue, t)
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}
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