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Component-wide TransactionWriters (#1290)

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* Offset updates take place using TransactionWriter

* Refactor TransactionWriter in current state server

* Refactor TransactionWriter in federation sender

* Refactor TransactionWriter in key server

* Refactor TransactionWriter in media API

* Refactor TransactionWriter in server key API

* Refactor TransactionWriter in sync API

* Refactor TransactionWriter in user API

* Fix deadlocking Sync API tests

* Un-deadlock device database

* Fix appservice API

* Rename TransactionWriters to Writers

* Move writers up a layer in sync API

* Document sqlutil.Writer interface

* Add note to Writer documentation
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Neil Alexander 2020-08-21 10:42:08 +01:00 • committed by GitHub
parent 5aaf32bbed
commit 9d53351dc2
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56 changed files with 483 additions and 483 deletions
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15
syncapi/storage/sqlite3/stream_id_table.go
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@ -28,14 +28,12 @@ const selectStreamIDStmt = "" +
type streamIDStatements struct {
db *sql.DB
writer sqlutil.TransactionWriter
increaseStreamIDStmt *sql.Stmt
selectStreamIDStmt *sql.Stmt
}
func (s *streamIDStatements) prepare(db *sql.DB) (err error) {
s.db = db
s.writer = sqlutil.NewTransactionWriter()
_, err = db.Exec(streamIDTableSchema)
if err != nil {
return
@ -52,14 +50,9 @@ func (s *streamIDStatements) prepare(db *sql.DB) (err error) {
func (s *streamIDStatements) nextStreamID(ctx context.Context, txn *sql.Tx) (pos types.StreamPosition, err error) {
increaseStmt := sqlutil.TxStmt(txn, s.increaseStreamIDStmt)
selectStmt := sqlutil.TxStmt(txn, s.selectStreamIDStmt)
err = s.writer.Do(s.db, nil, func(txn *sql.Tx) error {
if _, ierr := increaseStmt.ExecContext(ctx, "global"); err != nil {
return ierr
}
if serr := selectStmt.QueryRowContext(ctx, "global").Scan(&pos); err != nil {
return serr
}
return nil
})
if _, err = increaseStmt.ExecContext(ctx, "global"); err != nil {
return
}
err = selectStmt.QueryRowContext(ctx, "global").Scan(&pos)
return
}