Šķîþ ţö ḿàîñ çöñţéñţ

Çöñţéñţ Šţöŕé

Ţĥé Çöñţéñţ Šţöŕé îš ţĥé ṽéŕšîöñéđ, çöñţéñţ-àđđŕéššàƃļé þéŕšîšţéñçé ļàýéŕ ƒöŕ Ƃöŵŕàîñ þŕöĵéçţš.

Àŕçĥîţéçţüŕé​

Ţĥé šţöŕé šîţš ƃéţŵééñ çöññéçţöŕš, ŵĥîçĥ þüļļ àñđ þüšĥ éẋţéŕñàļ çöñţéñţ, àñđ ţĥé þŕöçéššîñĝ þîþéļîñé: ƒļöŵš, ţööļš, çöñţéñţ ḿéḿöŕý àñđ ţéŕḿš. Ṽéŕšîöñš ŕéçöŕđ ñàḿéđ šñàþšĥöţš öƒ ţĥé šţöŕé.

Connectorsfetch · publishContentStoreblocks · versionsFlows and toolsread and write blocks

Ķéý Çöñçéþţš​

  • ƂļöçķÎđéñţîţý: çöñţéñţ-àđđŕéššàƃļé ĥàšĥîñĝ (ŠĤÀ-256) ƒöŕ ƃļöçķ đéđüþļîçàţîöñ àñđ çĥàñĝé đéţéçţîöñ
  • ÇöñţéñţŔéƒ: ļîñķš ƃļöçķš ţö ţĥéîŕ éẋţéŕñàļ çöññéçţöŕ šöüŕçé ŵîţĥ šýñç ţŕàçķîñĝ
  • ĐîšþļàýĤîñţ: ÜÎ ŕéñđéŕîñĝ ĝüîđàñçé (þŕéṽîéŵ, çöñţéẋţ, ḿàẋ ļéñĝţĥ, çöñţéñţ ţýþé)
  • Ṽéŕšîöñ: ñàḿéđ šñàþšĥöţ öƒ þŕöĵéçţ šţàţé ŵîţĥ ƃļöçķ-ļéṽéļ đîñĝ

ÇöñţéñţŠţöŕé Îñţéŕƒàçé​

ContentStore (bowrain/core/store/store.go) îš ţĥé üñîöñ öƒ ŕöļé îñţéŕƒàçéš, öñé þéŕ çöñçéŕñ. Àļļ çöñţéñţ öþéŕàţîöñš àŕé šţŕéàḿ-šçöþéđ: àñ éḿþţý šţŕéàḿ ñàḿé đéƒàüļţš ţö "main", ŵĥîçĥ éṽéŕý þŕöĵéçţ îḿþļîçîţļý ĥàš.

// ContentStore is the primary persistence interface for content,
// the union of the role interfaces. All content operations are stream-scoped.
type ContentStore interface {
    ProjectStore    // projects: create, get, list, update, delete
    StreamStore     // streams within a project
    CollectionStore // collections (stream-scoped)
    ItemStore       // items (stream-scoped)
    BlockStore      // blocks, notes, history (stream-scoped)
    VersionStore    // named versions + diffs (stream-scoped)
    ChangeFeed      // incremental sync change log (stream-scoped)
    AssetStore      // assets and locale variants

    Close() error
}

Ŕéþŕéšéñţàţîṽé šîĝñàţüŕéš; ñöţé ţĥé stream þàŕàḿéţéŕ ţĥŕöüĝĥöüţ:

// BlockStore
StoreBlocks(ctx context.Context, projectID, stream string, blocks []*model.Block) error
GetBlocks(ctx context.Context, query BlockQuery) ([]*StoredBlock, error)

// VersionStore
CreateVersion(ctx context.Context, projectID, stream, label, description string) (*Version, error)
Diff(ctx context.Context, fromVersion, toVersion string) (*VersionDiff, error)

Ƃàçķéñđš​

Ţŵö ƃàçķéñđš îḿþļéḿéñţ ContentStore, ŵîţĥ đéŕéñţ ŕöļéš:

  • ÞöšţĝŕéŠǪĻ îš ţĥé šéŕṽéŕ'š öñļý ƃàçķéñđ. bowrain-server ŕéƒüšéš ţö šţàŕţ ŵîţĥöüţ à postgres:// đàţàƃàšé ÜŔĻ àñđ ƃüîļđš àļļ öƒ îţš šţöŕéš öñ ţĥàţ çöññéçţîöñ. Ţĥîš îš ţĥé šöüŕçé öƒ ţŕüţĥ ƒöŕ éṽéŕý ŵöŕķšþàçé.
  • ŠǪĻîţé (bowrain/store/sqlitestore) ƃàçķš ţĥé đéšķţöþ àþþ'š ļöçàļ ŵöŕķîñĝ çöþý: à çàçĥé ƒöŕ šþééđ àñđ öƒƒļîñé éđîţš ţĥàţ ḿîŕŕöŕš ţĥé šéŕṽéŕ àñđ îš ñéṽéŕ à šöüŕçé öƒ ţŕüţĥ.
import "github.com/neokapi/neokapi/bowrain/store/sqlitestore"

store, err := sqlitestore.NewSQLiteStore("working-copy.db")
if err != nil {
    log.Fatal(err)
}
defer store.Close()

Ƃöţĥ ƃàçķéñđš šĥàŕé öñé ļöĝîçàļ šçĥéḿà: þŕöĵéçţš, šţŕéàḿš, çöļļéçţîöñš, îţéḿš, ƃļöçķš, ṽéŕšîöñš, ţĥé çĥàñĝé ļöĝ, àñđ àššéţš.

Ĥéļđ ƃļöçķ ŵŕîţéš​

Ţĥé šéŕṽéŕ'š çĥàñĝé šéŕṽîçé ŕéàđš àñđ ŵŕîţéš à šţŕéàḿ'š ƃļöçķš ţĥŕöüĝĥ BlockWriteStore, ŵĥîçĥ ţĥé ÞöšţĝŕéŠǪĻ ƃàçķéñđ îḿþļéḿéñţš àñđ ţĥé éṽéñţ-éḿîţţîñĝ đéçöŕàţöŕ ƒöŕŵàŕđš:

// BlockWriteStore
ItemBlocks(ctx context.Context, projectID, stream, itemName string, keys []string) ([]*StoredBlock, error)
BeginBlockWrite(ctx context.Context, projectID, stream string) (BlockWrite, error)

// BlockWrite
Hold(ctx context.Context, itemName string, keys []string) ([]*StoredBlock, error)
Store(ctx context.Context, blocks []*StoredBlock) error
Commit() error
Rollback() error

keys ñàḿéš ƃļöçķš ƃý ţĥéîŕ đüŕàƃļé ķéý, ţĥéîŕ ñàḿé öŕ ţĥéîŕ ŕöŵ îđ. À BlockWrite îš öñé ţŕàñšàçţîöñ üñđéŕ ţĥé šţŕéàḿ'š šĥàŕéđ ŵŕîţé ļöçķ. Hold ŕéàđš àñ îţéḿ'š ƃļöçķš àñđ ļöçķš ţĥéîŕ ŕöŵš üñţîļ ţĥé ŵŕîţé éñđš. Store ŵŕîţéš ţĥé çĥàñĝéđ ƃļöçķš ƃàçķ ţö ţĥöšé ŕöŵš ŵîţĥ ţĥéîŕ ĥîšţöŕý àñđ çĥàñĝé-ļöĝ éñţŕîéš, àñđ đéļéţéš ţĥé ŕöŵ öƒ éàçĥ ţŕàñšļàţîöñ ţĥé çĥàñĝé ŕéḿöṽéđ, ŕéçöŕđîñĝ ţĥé ŕéḿöṽàļ àš target_removed. Ţĥé çĥàñĝé šéŕṽîçé ĥöļđš éṽéŕý îţéḿ à çĥàñĝé šéţ ñàḿéš öñ öñé BlockWrite àñđ çöḿþàŕéš ţĥé ŕéṽîšîöñ éàçĥ öþéŕàţîöñ ñàḿéš àĝàîñšţ ţĥé ĥéļđ ŕöŵš, šö ñö öţĥéŕ ŵŕîţé ļàñđš ƃéţŵééñ ţĥàţ çöḿþàŕîšöñ àñđ ţĥé çöḿḿîţ, àñđ ţĥé çĥàñĝé šéţ ļàñđš ŵĥöļé öñ öñé çöññéçţîöñ.

Ŕéṽéŕţ, ŕéšţöŕé-ţö-þöîñţ àñđ ŕöļļƃàçķ ŕéàđ à ţŕàñšļàţîöñ'š ĥîšţöŕý ƃý ţĥé ŕöŵš ţĥàţ ŕéçöŕđ îţš çöñţéñţ (target_added, target_modified, target_removed). À target_removed ŕöŵ ŕéšţöŕéš ñö ţŕàñšļàţîöñ, àñđ à đéçîšîöñ ŕöŵ ŕéšţöŕéš ñöţĥîñĝ.

Ƃļöçķ Îđéñţîţý​

Éṽéŕý šţöŕéđ ƃļöçķ ĝéţš à çöñţéñţ-àđđŕéššàƃļé îđéñţîţý çöḿþüţéđ ƒŕöḿ îţš šöüŕçé ţéẋţ:

identity := model.ComputeIdentity(block)
// identity.ContentHash = SHA-256 of normalized source text
// identity.ContextHash = SHA-256 of block name, type, and properties

Ţĥîš éñàƃļéš:

  • Đéđüþļîçàţîöñ: îđéñţîçàļ šöüŕçé ţéẋţ šĥàŕéš ţĥé šàḿé çöñţéñţ ĥàšĥ
  • Çĥàñĝé đéţéçţîöñ: ṽéŕšîöñ đš çöḿþàŕé çöñţéñţ ĥàšĥéš îñšţéàđ öƒ ƒüļļ ţéẋţ
  • Çàçĥé îñṽàļîđàţîöñ: ŕéšüļţš çàñ ƃé çàçĥéđ ƃý çöñţéñţ ĥàšĥ

Ṽéŕšîöñ Ţŕàçķîñĝ​

Ṽéŕšîöñš àŕé ñàḿéđ šñàþšĥöţš öƒ à þŕöĵéçţ'š ƃļöçķ šţàţé:

// Create a snapshot of a stream
v, err := store.CreateVersion(ctx, projectID, "main", "v1.0", "Initial release")

// List a stream's versions
versions, err := store.ListVersions(ctx, projectID, "main")

// Diff two versions
diff, err := store.Diff(ctx, v1.ID, v2.ID)
for _, change := range diff.Changes {
    fmt.Printf("%s: %s\n", change.BlockID, change.ChangeType)
}

Ƒļöŵ Îñţéĝŕàţîöñ​

Šéŕṽéŕ-šîđé ƒļöŵš ŕéàđ ƒŕöḿ àñđ ŵŕîţé ţö ţĥé çöñţéñţ šţöŕé ţĥŕöüĝĥ ţĥé ƒļöŵ šéŕṽîçé: à ŕüñ ļöàđš ţĥé þŕöĵéçţ'š ƃļöçķš ƒŕöḿ ţĥé šţöŕé, éẋéçüţéš ţĥé ƒļöŵ, àñđ šţöŕéš ţĥé þŕöđüçéđ ţàŕĝéţš ƃàçķ. Šéé Šéŕṽéŕ-šîđé ƒļöŵš.