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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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16
internal/sqlutil/writer_dummy.go
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@ -4,15 +4,21 @@ import (
"database/sql"
)
type DummyTransactionWriter struct {
// DummyWriter implements sqlutil.Writer.
// The DummyWriter is designed to allow reuse of the sqlutil.Writer
// interface but, unlike ExclusiveWriter, it will not guarantee
// writer exclusivity. This is fine in PostgreSQL where overlapping
// transactions and writes are acceptable.
type DummyWriter struct {
}
func NewDummyTransactionWriter() TransactionWriter {
return &DummyTransactionWriter{}
// NewDummyWriter returns a new dummy writer.
func NewDummyWriter() Writer {
return &DummyWriter{}
}
func (w *DummyTransactionWriter) Do(db *sql.DB, txn *sql.Tx, f func(txn *sql.Tx) error) error {
if txn == nil {
func (w *DummyWriter) Do(db *sql.DB, txn *sql.Tx, f func(txn *sql.Tx) error) error {
if db != nil && txn == nil {
return WithTransaction(db, func(txn *sql.Tx) error {
return f(txn)
})