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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package shared
import (
"context"
"database/sql"
"encoding/json"
"fmt"
"github.com/matrix-org/dendrite/federationsender/storage/tables"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
type Database struct {
DB *sql.DB
FederationSenderQueuePDUs tables.FederationSenderQueuePDUs
FederationSenderQueueEDUs tables.FederationSenderQueueEDUs
FederationSenderQueueJSON tables.FederationSenderQueueJSON
FederationSenderJoinedHosts tables.FederationSenderJoinedHosts
FederationSenderRooms tables.FederationSenderRooms
}
// An Receipt contains the NIDs of a call to GetNextTransactionPDUs/EDUs.
// We don't actually export the NIDs but we need the caller to be able
// to pass them back so that we can clean up if the transaction sends
// successfully.
type Receipt struct {
nids []int64
}
func (e *Receipt) Empty() bool {
return len(e.nids) == 0
}
func (e *Receipt) String() string {
j, _ := json.Marshal(e.nids)
return string(j)
}
// UpdateRoom updates the joined hosts for a room and returns what the joined
// hosts were before the update, or nil if this was a duplicate message.
// This is called when we receive a message from kafka, so we pass in
// oldEventID and newEventID to check that we haven't missed any messages or
// this isn't a duplicate message.
func (d *Database) UpdateRoom(
ctx context.Context,
roomID, oldEventID, newEventID string,
addHosts []types.JoinedHost,
removeHosts []string,
) (joinedHosts []types.JoinedHost, err error) {
err = sqlutil.WithTransaction(d.DB, func(txn *sql.Tx) error {
err = d.FederationSenderRooms.InsertRoom(ctx, txn, roomID)
if err != nil {
return err
}
lastSentEventID, err := d.FederationSenderRooms.SelectRoomForUpdate(ctx, txn, roomID)
if err != nil {
return err
}
if lastSentEventID == newEventID {
// We've handled this message before, so let's just ignore it.
// We can only get a duplicate for the last message we processed,
// so its enough just to compare the newEventID with lastSentEventID
return nil
}
if lastSentEventID != "" && lastSentEventID != oldEventID {
return types.EventIDMismatchError{
DatabaseID: lastSentEventID, RoomServerID: oldEventID,
}
}
joinedHosts, err = d.FederationSenderJoinedHosts.SelectJoinedHostsWithTx(ctx, txn, roomID)
if err != nil {
return err
}
for _, add := range addHosts {
err = d.FederationSenderJoinedHosts.InsertJoinedHosts(ctx, txn, roomID, add.MemberEventID, add.ServerName)
if err != nil {
return err
}
}
if err = d.FederationSenderJoinedHosts.DeleteJoinedHosts(ctx, txn, removeHosts); err != nil {
return err
}
return d.FederationSenderRooms.UpdateRoom(ctx, txn, roomID, newEventID)
})
return
}
// GetJoinedHosts returns the currently joined hosts for room,
// as known to federationserver.
// Returns an error if something goes wrong.
func (d *Database) GetJoinedHosts(
ctx context.Context, roomID string,
) ([]types.JoinedHost, error) {
return d.FederationSenderJoinedHosts.SelectJoinedHosts(ctx, roomID)
}
// GetAllJoinedHosts returns the currently joined hosts for
// all rooms known to the federation sender.
// Returns an error if something goes wrong.
func (d *Database) GetAllJoinedHosts(ctx context.Context) ([]gomatrixserverlib.ServerName, error) {
return d.FederationSenderJoinedHosts.SelectAllJoinedHosts(ctx)
}
// StoreJSON adds a JSON blob into the queue JSON table and returns
// a NID. The NID will then be used when inserting the per-destination
// metadata entries.
func (d *Database) StoreJSON(
ctx context.Context, js string,
) (*Receipt, error) {
nid, err := d.FederationSenderQueueJSON.InsertQueueJSON(ctx, nil, js)
if err != nil {
return nil, fmt.Errorf("d.insertQueueJSON: %w", err)
}
return &Receipt{
nids: []int64{nid},
}, nil
}
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