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Roomserver updater changes (#1283)

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* Take input transaction when setting up updaters

* Fix nil pointer exceptions

* Rename room recent events updater to latest events updater

* Contd rename room recent events updater to latest events updater

* Remove unnecessary interfaces for latest events and membership updaters
This commit is contained in:
Neil Alexander 2020-08-19 13:24:54 +01:00 committed by GitHub
parent 3d58417555
commit 775b04d776
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 63 additions and 137 deletions
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3
roomserver/internal/input_latest_events.go
View file

@ -24,6 +24,7 @@ import (
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/state"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
@ -92,7 +93,7 @@ func (r *RoomserverInternalAPI) updateLatestEvents(
type latestEventsUpdater struct {
ctx context.Context
api *RoomserverInternalAPI
updater types.RoomRecentEventsUpdater
updater *shared.LatestEventsUpdater
roomNID types.RoomNID
stateAtEvent types.StateAtEvent
event gomatrixserverlib.Event

11
roomserver/internal/input_membership.go
View file

@ -19,6 +19,7 @@ import (
"fmt"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/gomatrixserverlib"
)
@ -29,7 +30,7 @@ import (
// consumers about the invites added or retired by the change in current state.
func (r *RoomserverInternalAPI) updateMemberships(
ctx context.Context,
updater types.RoomRecentEventsUpdater,
updater *shared.LatestEventsUpdater,
removed, added []types.StateEntry,
) ([]api.OutputEvent, error) {
changes := membershipChanges(removed, added)
@ -77,7 +78,7 @@ func (r *RoomserverInternalAPI) updateMemberships(
}
func (r *RoomserverInternalAPI) updateMembership(
updater types.RoomRecentEventsUpdater,
updater *shared.LatestEventsUpdater,
targetUserNID types.EventStateKeyNID,
remove, add *gomatrixserverlib.Event,
updates []api.OutputEvent,
@ -141,7 +142,7 @@ func (r *RoomserverInternalAPI) isLocalTarget(event *gomatrixserverlib.Event) bo
}
func updateToInviteMembership(
mu types.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent,
mu *shared.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent,
roomVersion gomatrixserverlib.RoomVersion,
) ([]api.OutputEvent, error) {
// We may have already sent the invite to the user, either because we are
@ -171,7 +172,7 @@ func updateToInviteMembership(
}
func updateToJoinMembership(
mu types.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent,
mu *shared.MembershipUpdater, add *gomatrixserverlib.Event, updates []api.OutputEvent,
) ([]api.OutputEvent, error) {
// If the user is already marked as being joined, we call SetToJoin to update
// the event ID then we can return immediately. Retired is ignored as there
@ -207,7 +208,7 @@ func updateToJoinMembership(
}
func updateToLeaveMembership(
mu types.MembershipUpdater, add *gomatrixserverlib.Event,
mu *shared.MembershipUpdater, add *gomatrixserverlib.Event,
newMembership string, updates []api.OutputEvent,
) ([]api.OutputEvent, error) {
// If the user is already neither joined, nor invited to the room then we

5
roomserver/storage/interface.go
View file

@ -18,6 +18,7 @@ import (
"context"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/dendrite/roomserver/storage/shared"
"github.com/matrix-org/dendrite/roomserver/types"
"github.com/matrix-org/gomatrixserverlib"
)
@ -86,7 +87,7 @@ type Database interface {
// The RoomRecentEventsUpdater must have Commit or Rollback called on it if this doesn't return an error.
// Returns the latest events in the room and the last eventID sent to the log along with an updater.
// If this returns an error then no further action is required.
GetLatestEventsForUpdate(ctx context.Context, roomNID types.RoomNID) (types.RoomRecentEventsUpdater, error)
GetLatestEventsForUpdate(ctx context.Context, roomNID types.RoomNID) (*shared.LatestEventsUpdater, error)
// Look up event ID by transaction's info.
// This is used to determine if the room event is processed/processing already.
// Returns an empty string if no such event exists.
@ -123,7 +124,7 @@ type Database interface {
// Returns an error if there was a problem talking to the database.
RemoveRoomAlias(ctx context.Context, alias string) error
// Build a membership updater for the target user in a room.
MembershipUpdater(ctx context.Context, roomID, targetUserID string, targetLocal bool, roomVersion gomatrixserverlib.RoomVersion) (types.MembershipUpdater, error)
MembershipUpdater(ctx context.Context, roomID, targetUserID string, targetLocal bool, roomVersion gomatrixserverlib.RoomVersion) (*shared.MembershipUpdater, error)
// Lookup the membership of a given user in a given room.
// Returns the numeric ID of the latest membership event sent from this user
// in this room, along a boolean set to true if the user is still in this room,

34
roomserver/storage/shared/room_recent_events_updater.go → roomserver/storage/shared/latest_events_updater.go
View file

@ -8,7 +8,7 @@ import (
"github.com/matrix-org/gomatrixserverlib"
)
type roomRecentEventsUpdater struct {
type LatestEventsUpdater struct {
transaction
d *Database
roomNID types.RoomNID
@ -17,11 +17,7 @@ type roomRecentEventsUpdater struct {
currentStateSnapshotNID types.StateSnapshotNID
}
func NewRoomRecentEventsUpdater(d *Database, ctx context.Context, roomNID types.RoomNID, useTxns bool) (types.RoomRecentEventsUpdater, error) {
txn, err := d.DB.Begin()
if err != nil {
return nil, err
}
func NewLatestEventsUpdater(ctx context.Context, d *Database, txn *sql.Tx, roomNID types.RoomNID) (*LatestEventsUpdater, error) {
eventNIDs, lastEventNIDSent, currentStateSnapshotNID, err :=
d.RoomsTable.SelectLatestEventsNIDsForUpdate(ctx, txn, roomNID)
if err != nil {
@ -41,38 +37,34 @@ func NewRoomRecentEventsUpdater(d *Database, ctx context.Context, roomNID types.
return nil, err
}
}
if !useTxns {
txn.Commit() // nolint: errcheck
txn = nil
}
return &roomRecentEventsUpdater{
return &LatestEventsUpdater{
transaction{ctx, txn}, d, roomNID, stateAndRefs, lastEventIDSent, currentStateSnapshotNID,
}, nil
}
// RoomVersion implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) RoomVersion() (version gomatrixserverlib.RoomVersion) {
func (u *LatestEventsUpdater) RoomVersion() (version gomatrixserverlib.RoomVersion) {
version, _ = u.d.GetRoomVersionForRoomNID(u.ctx, u.roomNID)
return
}
// LatestEvents implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) LatestEvents() []types.StateAtEventAndReference {
func (u *LatestEventsUpdater) LatestEvents() []types.StateAtEventAndReference {
return u.latestEvents
}
// LastEventIDSent implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) LastEventIDSent() string {
func (u *LatestEventsUpdater) LastEventIDSent() string {
return u.lastEventIDSent
}
// CurrentStateSnapshotNID implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) CurrentStateSnapshotNID() types.StateSnapshotNID {
func (u *LatestEventsUpdater) CurrentStateSnapshotNID() types.StateSnapshotNID {
return u.currentStateSnapshotNID
}
// StorePreviousEvents implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) StorePreviousEvents(eventNID types.EventNID, previousEventReferences []gomatrixserverlib.EventReference) error {
func (u *LatestEventsUpdater) StorePreviousEvents(eventNID types.EventNID, previousEventReferences []gomatrixserverlib.EventReference) error {
for _, ref := range previousEventReferences {
if err := u.d.PrevEventsTable.InsertPreviousEvent(u.ctx, u.txn, ref.EventID, ref.EventSHA256, eventNID); err != nil {
return err
@ -82,7 +74,7 @@ func (u *roomRecentEventsUpdater) StorePreviousEvents(eventNID types.EventNID, p
}
// IsReferenced implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) IsReferenced(eventReference gomatrixserverlib.EventReference) (bool, error) {
func (u *LatestEventsUpdater) IsReferenced(eventReference gomatrixserverlib.EventReference) (bool, error) {
err := u.d.PrevEventsTable.SelectPreviousEventExists(u.ctx, u.txn, eventReference.EventID, eventReference.EventSHA256)
if err == nil {
return true, nil
@ -94,7 +86,7 @@ func (u *roomRecentEventsUpdater) IsReferenced(eventReference gomatrixserverlib.
}
// SetLatestEvents implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) SetLatestEvents(
func (u *LatestEventsUpdater) SetLatestEvents(
roomNID types.RoomNID, latest []types.StateAtEventAndReference, lastEventNIDSent types.EventNID,
currentStateSnapshotNID types.StateSnapshotNID,
) error {
@ -106,15 +98,15 @@ func (u *roomRecentEventsUpdater) SetLatestEvents(
}
// HasEventBeenSent implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) HasEventBeenSent(eventNID types.EventNID) (bool, error) {
func (u *LatestEventsUpdater) HasEventBeenSent(eventNID types.EventNID) (bool, error) {
return u.d.EventsTable.SelectEventSentToOutput(u.ctx, u.txn, eventNID)
}
// MarkEventAsSent implements types.RoomRecentEventsUpdater
func (u *roomRecentEventsUpdater) MarkEventAsSent(eventNID types.EventNID) error {
func (u *LatestEventsUpdater) MarkEventAsSent(eventNID types.EventNID) error {
return u.d.EventsTable.UpdateEventSentToOutput(u.ctx, u.txn, eventNID)
}
func (u *roomRecentEventsUpdater) MembershipUpdater(targetUserNID types.EventStateKeyNID, targetLocal bool) (types.MembershipUpdater, error) {
func (u *LatestEventsUpdater) MembershipUpdater(targetUserNID types.EventStateKeyNID, targetLocal bool) (*MembershipUpdater, error) {
return u.d.membershipUpdaterTxn(u.ctx, u.txn, u.roomNID, targetUserNID, targetLocal)
}

46
roomserver/storage/shared/membership_updater.go
View file

@ -9,7 +9,7 @@ import (
"github.com/matrix-org/gomatrixserverlib"
)
type membershipUpdater struct {
type MembershipUpdater struct {
transaction
d *Database
roomNID types.RoomNID
@ -18,21 +18,9 @@ type membershipUpdater struct {
}
func NewMembershipUpdater(
ctx context.Context, d *Database, roomID, targetUserID string,
ctx context.Context, d *Database, txn *sql.Tx, roomID, targetUserID string,
targetLocal bool, roomVersion gomatrixserverlib.RoomVersion,
useTxns bool,
) (types.MembershipUpdater, error) {
txn, err := d.DB.Begin()
if err != nil {
return nil, err
}
succeeded := false
defer func() {
if !succeeded {
txn.Rollback() // nolint: errcheck
}
}()
) (*MembershipUpdater, error) {
roomNID, err := d.assignRoomNID(ctx, txn, roomID, roomVersion)
if err != nil {
return nil, err
@ -43,17 +31,7 @@ func NewMembershipUpdater(
return nil, err
}
updater, err := d.membershipUpdaterTxn(ctx, txn, roomNID, targetUserNID, targetLocal)
if err != nil {
return nil, err
}
succeeded = true
if !useTxns {
txn.Commit() // nolint: errcheck
updater.transaction.txn = nil
}
return updater, nil
return d.membershipUpdaterTxn(ctx, txn, roomNID, targetUserNID, targetLocal)
}
func (d *Database) membershipUpdaterTxn(
@ -62,7 +40,7 @@ func (d *Database) membershipUpdaterTxn(
roomNID types.RoomNID,
targetUserNID types.EventStateKeyNID,
targetLocal bool,
) (*membershipUpdater, error) {
) (*MembershipUpdater, error) {
if err := d.MembershipTable.InsertMembership(ctx, txn, roomNID, targetUserNID, targetLocal); err != nil {
return nil, err
@ -73,28 +51,28 @@ func (d *Database) membershipUpdaterTxn(
return nil, err
}
return &membershipUpdater{
return &MembershipUpdater{
transaction{ctx, txn}, d, roomNID, targetUserNID, membership,
}, nil
}
// IsInvite implements types.MembershipUpdater
func (u *membershipUpdater) IsInvite() bool {
func (u *MembershipUpdater) IsInvite() bool {
return u.membership == tables.MembershipStateInvite
}
// IsJoin implements types.MembershipUpdater
func (u *membershipUpdater) IsJoin() bool {
func (u *MembershipUpdater) IsJoin() bool {
return u.membership == tables.MembershipStateJoin
}
// IsLeave implements types.MembershipUpdater
func (u *membershipUpdater) IsLeave() bool {
func (u *MembershipUpdater) IsLeave() bool {
return u.membership == tables.MembershipStateLeaveOrBan
}
// SetToInvite implements types.MembershipUpdater
func (u *membershipUpdater) SetToInvite(event gomatrixserverlib.Event) (bool, error) {
func (u *MembershipUpdater) SetToInvite(event gomatrixserverlib.Event) (bool, error) {
senderUserNID, err := u.d.assignStateKeyNID(u.ctx, u.txn, event.Sender())
if err != nil {
return false, err
@ -116,7 +94,7 @@ func (u *membershipUpdater) SetToInvite(event gomatrixserverlib.Event) (bool, er
}
// SetToJoin implements types.MembershipUpdater
func (u *membershipUpdater) SetToJoin(senderUserID string, eventID string, isUpdate bool) ([]string, error) {
func (u *MembershipUpdater) SetToJoin(senderUserID string, eventID string, isUpdate bool) ([]string, error) {
var inviteEventIDs []string
senderUserNID, err := u.d.assignStateKeyNID(u.ctx, u.txn, senderUserID)
@ -153,7 +131,7 @@ func (u *membershipUpdater) SetToJoin(senderUserID string, eventID string, isUpd
}
// SetToLeave implements types.MembershipUpdater
func (u *membershipUpdater) SetToLeave(senderUserID string, eventID string) ([]string, error) {
func (u *MembershipUpdater) SetToLeave(senderUserID string, eventID string) ([]string, error) {
senderUserNID, err := u.d.assignStateKeyNID(u.ctx, u.txn, senderUserID)
if err != nil {
return nil, err

16
roomserver/storage/shared/storage.go
View file

@ -332,14 +332,22 @@ func (d *Database) GetTransactionEventID(
func (d *Database) MembershipUpdater(
ctx context.Context, roomID, targetUserID string,
targetLocal bool, roomVersion gomatrixserverlib.RoomVersion,
) (types.MembershipUpdater, error) {
return NewMembershipUpdater(ctx, d, roomID, targetUserID, targetLocal, roomVersion, true)
) (*MembershipUpdater, error) {
txn, err := d.DB.Begin()
if err != nil {
return nil, err
}
return NewMembershipUpdater(ctx, d, txn, roomID, targetUserID, targetLocal, roomVersion)
}
func (d *Database) GetLatestEventsForUpdate(
ctx context.Context, roomNID types.RoomNID,
) (types.RoomRecentEventsUpdater, error) {
return NewRoomRecentEventsUpdater(d, ctx, roomNID, true)
) (*LatestEventsUpdater, error) {
txn, err := d.DB.Begin()
if err != nil {
return nil, err
}
return NewLatestEventsUpdater(ctx, d, txn, roomNID)
}
func (d *Database) StoreEvent(

14
roomserver/storage/sqlite3/events_table.go
View file

@ -326,9 +326,13 @@ func (s *eventStatements) BulkSelectStateAtEventAndReference(
iEventNIDs[k] = v
}
selectOrig := strings.Replace(bulkSelectStateAtEventAndReferenceSQL, "($1)", sqlutil.QueryVariadic(len(iEventNIDs)), 1)
selectPrep, err := s.db.Prepare(selectOrig)
if err != nil {
return nil, err
}
//////////////
rows, err := txn.QueryContext(ctx, selectOrig, iEventNIDs...)
rows, err := sqlutil.TxStmt(txn, selectPrep).QueryContext(ctx, iEventNIDs...)
if err != nil {
return nil, err
}
@ -372,7 +376,7 @@ func (s *eventStatements) BulkSelectEventReference(
iEventNIDs[k] = v
}
selectOrig := strings.Replace(bulkSelectEventReferenceSQL, "($1)", sqlutil.QueryVariadic(len(iEventNIDs)), 1)
selectPrep, err := txn.Prepare(selectOrig)
selectPrep, err := s.db.Prepare(selectOrig)
if err != nil {
return nil, err
}
@ -471,7 +475,11 @@ func (s *eventStatements) SelectMaxEventDepth(ctx context.Context, txn *sql.Tx,
iEventIDs[i] = v
}
sqlStr := strings.Replace(selectMaxEventDepthSQL, "($1)", sqlutil.QueryVariadic(len(iEventIDs)), 1)
err := txn.QueryRowContext(ctx, sqlStr, iEventIDs...).Scan(&result)
sqlPrep, err := s.db.Prepare(sqlStr)
if err != nil {
return 0, err
}
err = sqlutil.TxStmt(txn, sqlPrep).QueryRowContext(ctx, iEventIDs...).Scan(&result)
if err != nil {
return 0, err
}

8
roomserver/storage/sqlite3/storage.go
View file

@ -139,25 +139,25 @@ func Open(dbProperties *config.DatabaseOptions) (*Database, error) {
func (d *Database) GetLatestEventsForUpdate(
ctx context.Context, roomNID types.RoomNID,
) (types.RoomRecentEventsUpdater, error) {
) (*shared.LatestEventsUpdater, error) {
// TODO: Do not use transactions. We should be holding open this transaction but we cannot have
// multiple write transactions on sqlite. The code will perform additional
// write transactions independent of this one which will consistently cause
// 'database is locked' errors. As sqlite doesn't support multi-process on the
// same DB anyway, and we only execute updates sequentially, the only worries
// are for rolling back when things go wrong. (atomicity)
return shared.NewRoomRecentEventsUpdater(&d.Database, ctx, roomNID, false)
return shared.NewLatestEventsUpdater(ctx, &d.Database, nil, roomNID)
}
func (d *Database) MembershipUpdater(
ctx context.Context, roomID, targetUserID string,
targetLocal bool, roomVersion gomatrixserverlib.RoomVersion,
) (updater types.MembershipUpdater, err error) {
) (*shared.MembershipUpdater, error) {
// TODO: Do not use transactions. We should be holding open this transaction but we cannot have
// multiple write transactions on sqlite. The code will perform additional
// write transactions independent of this one which will consistently cause
// 'database is locked' errors. As sqlite doesn't support multi-process on the
// same DB anyway, and we only execute updates sequentially, the only worries
// are for rolling back when things go wrong. (atomicity)
return shared.NewMembershipUpdater(ctx, &d.Database, roomID, targetUserID, targetLocal, roomVersion, false)
return shared.NewMembershipUpdater(ctx, &d.Database, nil, roomID, targetUserID, targetLocal, roomVersion)
}

63
roomserver/types/types.go
View file

@ -16,7 +16,6 @@
package types
import (
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
@ -140,68 +139,6 @@ type StateEntryList struct {
StateEntries []StateEntry
}
// A RoomRecentEventsUpdater is used to update the recent events in a room.
// (On postgresql this wraps a database transaction that holds a "FOR UPDATE"
// lock on the row in the rooms table holding the latest events for the room.)
type RoomRecentEventsUpdater interface {
// The room version of the room.
RoomVersion() gomatrixserverlib.RoomVersion
// The latest event IDs and state in the room.
LatestEvents() []StateAtEventAndReference
// The event ID of the latest event written to the output log in the room.
LastEventIDSent() string
// The current state of the room.
CurrentStateSnapshotNID() StateSnapshotNID
// Store the previous events referenced by an event.
// This adds the event NID to an entry in the database for each of the previous events.
// If there isn't an entry for one of previous events then an entry is created.
// If the entry already lists the event NID as a referrer then the entry unmodified.
// (i.e. the operation is idempotent)
StorePreviousEvents(eventNID EventNID, previousEventReferences []gomatrixserverlib.EventReference) error
// Check whether the eventReference is already referenced by another matrix event.
IsReferenced(eventReference gomatrixserverlib.EventReference) (bool, error)
// Set the list of latest events for the room.
// This replaces the current list stored in the database with the given list
SetLatestEvents(
roomNID RoomNID, latest []StateAtEventAndReference, lastEventNIDSent EventNID,
currentStateSnapshotNID StateSnapshotNID,
) error
// Check if the event has already be written to the output logs.
HasEventBeenSent(eventNID EventNID) (bool, error)
// Mark the event as having been sent to the output logs.
MarkEventAsSent(eventNID EventNID) error
// Build a membership updater for the target user in this room.
// It will share the same transaction as this updater.
MembershipUpdater(targetUserNID EventStateKeyNID, isTargetLocalUser bool) (MembershipUpdater, error)
// Implements Transaction so it can be committed or rolledback
sqlutil.Transaction
}
// A MembershipUpdater is used to update the membership of a user in a room.
// (On postgresql this wraps a database transaction that holds a "FOR UPDATE"
// lock on the row in the membership table for this user in the room)
// The caller should call one of SetToInvite, SetToJoin or SetToLeave once to
// make the update, or none of them if no update is required.
type MembershipUpdater interface {
// True if the target user is invited to the room before updating.
IsInvite() bool
// True if the target user is joined to the room before updating.
IsJoin() bool
// True if the target user is not invited or joined to the room before updating.
IsLeave() bool
// Set the state to invite.
// Returns whether this invite needs to be sent
SetToInvite(event gomatrixserverlib.Event) (needsSending bool, err error)
// Set the state to join or updates the event ID in the database.
// Returns a list of invite event IDs that this state change retired.
SetToJoin(senderUserID string, eventID string, isUpdate bool) (inviteEventIDs []string, err error)
// Set the state to leave.
// Returns a list of invite event IDs that this state change retired.
SetToLeave(senderUserID string, eventID string) (inviteEventIDs []string, err error)
// Implements Transaction so it can be committed or rolledback.
sqlutil.Transaction
}
// A MissingEventError is an error that happened because the roomserver was
// missing requested events from its database.
type MissingEventError string