123 lines
3.4 KiB
Go
123 lines
3.4 KiB
Go
// Copyright 2017-2018 New Vector Ltd
|
|
// Copyright 2019-2020 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 postgres
|
|
|
|
import (
|
|
"context"
|
|
"database/sql"
|
|
|
|
"github.com/matrix-org/dendrite/common"
|
|
"github.com/matrix-org/dendrite/federationsender/types"
|
|
)
|
|
|
|
// Database stores information needed by the federation sender
|
|
type Database struct {
|
|
joinedHostsStatements
|
|
roomStatements
|
|
common.PartitionOffsetStatements
|
|
db *sql.DB
|
|
}
|
|
|
|
// NewDatabase opens a new database
|
|
func NewDatabase(dataSourceName string) (*Database, error) {
|
|
var result Database
|
|
var err error
|
|
if result.db, err = sql.Open("postgres", dataSourceName); err != nil {
|
|
return nil, err
|
|
}
|
|
if err = result.prepare(); err != nil {
|
|
return nil, err
|
|
}
|
|
return &result, nil
|
|
}
|
|
|
|
func (d *Database) prepare() error {
|
|
var err error
|
|
|
|
if err = d.joinedHostsStatements.prepare(d.db); err != nil {
|
|
return err
|
|
}
|
|
|
|
if err = d.roomStatements.prepare(d.db); err != nil {
|
|
return err
|
|
}
|
|
|
|
return d.PartitionOffsetStatements.Prepare(d.db, "federationsender")
|
|
}
|
|
|
|
// 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 = common.WithTransaction(d.db, func(txn *sql.Tx) error {
|
|
err = d.insertRoom(ctx, txn, roomID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
lastSentEventID, err := d.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 != oldEventID {
|
|
return types.EventIDMismatchError{
|
|
DatabaseID: lastSentEventID, RoomServerID: oldEventID,
|
|
}
|
|
}
|
|
|
|
joinedHosts, err = d.selectJoinedHostsWithTx(ctx, txn, roomID)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
for _, add := range addHosts {
|
|
err = d.insertJoinedHosts(ctx, txn, roomID, add.MemberEventID, add.ServerName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if err = d.deleteJoinedHosts(ctx, txn, removeHosts); err != nil {
|
|
return err
|
|
}
|
|
return d.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.selectJoinedHosts(ctx, roomID)
|
|
}
|