dendrite/federationsender/storage/sqlite3/storage.go

292 lines
8.1 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 sqlite3
import (
"context"
"database/sql"
"encoding/json"
"fmt"
_ "github.com/mattn/go-sqlite3"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
// Database stores information needed by the federation sender
type Database struct {
joinedHostsStatements
roomStatements
queuePDUsStatements
queueJSONStatements
sqlutil.PartitionOffsetStatements
db *sql.DB
queuePDUsWriter *sqlutil.TransactionWriter
queueJSONWriter *sqlutil.TransactionWriter
}
// NewDatabase opens a new database
func NewDatabase(dataSourceName string) (*Database, error) {
var result Database
var err error
cs, err := sqlutil.ParseFileURI(dataSourceName)
if err != nil {
return nil, err
}
if result.db, err = sqlutil.Open(sqlutil.SQLiteDriverName(), cs, nil); 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
}
if err = d.queuePDUsStatements.prepare(d.db); err != nil {
return err
}
if err = d.queueJSONStatements.prepare(d.db); err != nil {
return err
}
d.queuePDUsWriter = sqlutil.NewTransactionWriter()
d.queueJSONWriter = sqlutil.NewTransactionWriter()
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 = sqlutil.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 != "" && 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)
}
// 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,
) (nid int64, err error) {
err = d.queueJSONWriter.Do(d.db, func(txn *sql.Tx) error {
n, e := d.insertQueueJSON(ctx, nil, js)
if e != nil {
return fmt.Errorf("d.insertQueueJSON: %w", e)
}
nid = n
return nil
})
return
}
// AssociatePDUWithDestination creates an association that the
// destination queues will use to determine which JSON blobs to send
// to which servers.
func (d *Database) AssociatePDUWithDestination(
ctx context.Context,
transactionID gomatrixserverlib.TransactionID,
serverName gomatrixserverlib.ServerName,
nids []int64,
) error {
return d.queuePDUsWriter.Do(d.db, func(txn *sql.Tx) error {
for _, nid := range nids {
if err := d.insertQueuePDU(
ctx, // context
txn, // SQL transaction
transactionID, // transaction ID
serverName, // destination server name
nid, // NID from the federationsender_queue_json table
); err != nil {
return fmt.Errorf("d.insertQueueRetryStmt.ExecContext: %w", err)
}
}
return nil
})
}
// GetNextTransactionPDUs retrieves events from the database for
// the next pending transaction, up to the limit specified.
func (d *Database) GetNextTransactionPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
limit int,
) (
transactionID gomatrixserverlib.TransactionID,
events []*gomatrixserverlib.HeaderedEvent,
err error,
) {
err = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
transactionID, err = d.selectQueueNextTransactionID(ctx, txn, serverName)
if err != nil {
return fmt.Errorf("d.selectQueueNextTransactionID: %w", err)
}
if transactionID == "" {
return nil
}
nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, limit)
if err != nil {
return fmt.Errorf("d.selectQueuePDUs: %w", err)
}
blobs, err := d.selectQueueJSON(ctx, txn, nids)
if err != nil {
return fmt.Errorf("d.selectJSON: %w", err)
}
for _, blob := range blobs {
var event gomatrixserverlib.HeaderedEvent
if err := json.Unmarshal(blob, &event); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
events = append(events, &event)
}
return nil
})
return
}
// CleanTransactionPDUs cleans up all associated events for a
// given transaction. This is done when the transaction was sent
// successfully.
func (d *Database) CleanTransactionPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
) error {
var deleteNIDs []int64
nids, err := d.selectQueuePDUs(ctx, nil, serverName, transactionID, 50)
if err != nil {
return fmt.Errorf("d.selectQueuePDUs: %w", err)
}
if err = d.queuePDUsWriter.Do(d.db, func(txn *sql.Tx) error {
if err = d.deleteQueueTransaction(ctx, txn, serverName, transactionID); err != nil {
return fmt.Errorf("d.deleteQueueTransaction: %w", err)
}
return nil
}); err != nil {
return err
}
var count int64
for _, nid := range nids {
count, err = d.selectQueueReferenceJSONCount(ctx, nil, nid)
if err != nil {
return fmt.Errorf("d.selectQueueReferenceJSONCount: %w", err)
}
if count == 0 {
deleteNIDs = append(deleteNIDs, nid)
}
}
if len(deleteNIDs) > 0 {
err = d.queueJSONWriter.Do(d.db, func(txn *sql.Tx) error {
if err = d.deleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
return fmt.Errorf("d.deleteQueueJSON: %w", err)
}
return nil
})
}
return err
}
// GetPendingPDUCount returns the number of PDUs waiting to be
// sent for a given servername.
func (d *Database) GetPendingPDUCount(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
) (int64, error) {
return d.selectQueuePDUCount(ctx, nil, serverName)
}
// GetPendingServerNames returns the server names that have PDUs
// waiting to be sent.
func (d *Database) GetPendingServerNames(
ctx context.Context,
) ([]gomatrixserverlib.ServerName, error) {
return d.selectQueueServerNames(ctx, nil)
}