/
namespace.go
201 lines (167 loc) · 5.28 KB
/
namespace.go
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package crdb
import (
"context"
"errors"
"fmt"
"time"
sq "github.com/Masterminds/squirrel"
v0 "github.com/authzed/authzed-go/proto/authzed/api/v0"
"github.com/jackc/pgx/v4"
"github.com/rs/zerolog/log"
"github.com/shopspring/decimal"
"google.golang.org/protobuf/proto"
"github.com/authzed/spicedb/internal/datastore"
)
const (
errUnableToWriteConfig = "unable to write namespace config: %w"
errUnableToReadConfig = "unable to read namespace config: %w"
errUnableToDeleteConfig = "unable to delete namespace config: %w"
errUnableToListNamespaces = "unable to list namespaces: %w"
)
var (
upsertNamespaceSuffix = fmt.Sprintf(
"ON CONFLICT (%s) DO UPDATE SET %s = excluded.%s %s",
colNamespace,
colConfig,
colConfig,
queryReturningTimestamp,
)
queryWriteNamespace = psql.Insert(tableNamespace).Columns(
colNamespace,
colConfig,
).Suffix(upsertNamespaceSuffix)
queryReadNamespace = psql.Select(colConfig, colTimestamp).From(tableNamespace)
queryDeleteNamespace = psql.Delete(tableNamespace)
)
func (cds *crdbDatastore) WriteNamespace(ctx context.Context, newConfig *v0.NamespaceDefinition) (datastore.Revision, error) {
var hlcNow decimal.Decimal
if err := cds.execute(ctx, cds.conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
serialized, err := proto.Marshal(newConfig)
if err != nil {
return err
}
writeSQL, writeArgs, err := queryWriteNamespace.
Values(newConfig.Name, serialized).
ToSql()
if err != nil {
return err
}
return cds.conn.QueryRow(
datastore.SeparateContextWithTracing(ctx), writeSQL, writeArgs...,
).Scan(&hlcNow)
}); err != nil {
return datastore.NoRevision, fmt.Errorf(errUnableToWriteConfig, err)
}
return hlcNow, nil
}
func (cds *crdbDatastore) ReadNamespace(ctx context.Context, nsName string) (*v0.NamespaceDefinition, datastore.Revision, error) {
ctx = datastore.SeparateContextWithTracing(ctx)
tx, err := cds.conn.BeginTx(ctx, pgx.TxOptions{AccessMode: pgx.ReadOnly})
if err != nil {
return nil, datastore.NoRevision, fmt.Errorf(errUnableToReadConfig, err)
}
defer tx.Rollback(ctx)
config, timestamp, err := loadNamespace(ctx, tx, nsName)
if err != nil {
if errors.As(err, &datastore.ErrNamespaceNotFound{}) {
return nil, datastore.NoRevision, err
}
return nil, datastore.NoRevision, fmt.Errorf(errUnableToReadConfig, err)
}
return config, revisionFromTimestamp(timestamp), nil
}
func (cds *crdbDatastore) DeleteNamespace(ctx context.Context, nsName string) (datastore.Revision, error) {
ctx = datastore.SeparateContextWithTracing(ctx)
var timestamp time.Time
if err := cds.execute(ctx, cds.conn, pgx.TxOptions{}, func(tx pgx.Tx) error {
var err error
_, timestamp, err = loadNamespace(ctx, tx, nsName)
if err != nil {
return err
}
delSQL, delArgs, err := queryDeleteNamespace.
Where(sq.Eq{colNamespace: nsName, colTimestamp: timestamp}).
ToSql()
if err != nil {
return err
}
deletedNSResult, err := tx.Exec(ctx, delSQL, delArgs...)
if err != nil {
return err
}
numDeleted := deletedNSResult.RowsAffected()
if numDeleted != 1 {
log.Warn().Int64("numDeleted", numDeleted).Msg("deleted wrong number of namespaces")
}
deleteTupleSQL, deleteTupleArgs, err := queryDeleteTuples.
Where(sq.Eq{colNamespace: nsName}).
ToSql()
if err != nil {
return err
}
_, err = tx.Exec(ctx, deleteTupleSQL, deleteTupleArgs...)
return err
}); err != nil {
if errors.As(err, &datastore.ErrNamespaceNotFound{}) {
return datastore.NoRevision, err
}
return datastore.NoRevision, fmt.Errorf(errUnableToDeleteConfig, err)
}
return revisionFromTimestamp(timestamp), nil
}
func loadNamespace(ctx context.Context, tx pgx.Tx, nsName string) (*v0.NamespaceDefinition, time.Time, error) {
query := queryReadNamespace.Where(sq.Eq{colNamespace: nsName})
sql, args, err := query.ToSql()
if err != nil {
return nil, time.Time{}, err
}
var config []byte
var timestamp time.Time
if err := tx.QueryRow(ctx, sql, args...).Scan(&config, ×tamp); err != nil {
if err == pgx.ErrNoRows {
err = datastore.NewNamespaceNotFoundErr(nsName)
}
return nil, time.Time{}, err
}
loaded := &v0.NamespaceDefinition{}
err = proto.Unmarshal(config, loaded)
if err != nil {
return nil, time.Time{}, err
}
return loaded, timestamp, nil
}
func (cds *crdbDatastore) ListNamespaces(ctx context.Context) ([]*v0.NamespaceDefinition, error) {
ctx = datastore.SeparateContextWithTracing(ctx)
tx, err := cds.conn.Begin(ctx)
if err != nil {
return nil, fmt.Errorf(errUnableToListNamespaces, err)
}
defer tx.Rollback(ctx)
query := queryReadNamespace
sql, args, err := query.ToSql()
if err != nil {
return nil, fmt.Errorf(errUnableToListNamespaces, err)
}
var nsDefs []*v0.NamespaceDefinition
rows, err := tx.Query(ctx, sql, args...)
if err != nil {
return nil, fmt.Errorf(errUnableToListNamespaces, err)
}
defer rows.Close()
for rows.Next() {
var config []byte
var timestamp time.Time
if err := rows.Scan(&config, ×tamp); err != nil {
return nil, fmt.Errorf(errUnableToListNamespaces, err)
}
var loaded v0.NamespaceDefinition
if err := proto.Unmarshal(config, &loaded); err != nil {
return nil, fmt.Errorf(errUnableToReadConfig, err)
}
nsDefs = append(nsDefs, &loaded)
}
if rows.Err() != nil {
return nil, fmt.Errorf(errUnableToReadConfig, err)
}
return nsDefs, nil
}