mirror of
https://github.com/matrix-org/dendrite
synced 2024-09-11 13:39:13 +02:00
* Initial work on persistent queues * Update index for event ID and server name * Put things into database (postgres for now) * Duplicate postgres code into sqlite for now just to stop build errors, will fix SQLite soon * Fix table name * Fix index * Fix table name * Use RETURNING because LastInsertID is not supported by postgres * Use functions * Marshal headered event * Don't error on now rows * Don't block if there are PDUs waiting * Try to tidy up JSON * Debug logging * Fix query, use transactions in postgres * Clean up * Rehydrate more opportunistically * Fix SQLite * remove unused types * Review comments * Shuffle things around a bit * Clean up transaction properly * Don't send empty transactions * Reduce unnecessary retries * Count PDUs to make more resilient * Don't stop when there is work to be done * Try to limit wakeups * well this is tedious * Fix race in incomplete transactions * Thread safety on transaction ID/count
263 lines
7.2 KiB
Go
263 lines
7.2 KiB
Go
// Copyright 2017-2018 New Vector Ltd
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// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package sqlite3
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import (
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"context"
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"database/sql"
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"encoding/json"
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"fmt"
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_ "github.com/mattn/go-sqlite3"
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"github.com/matrix-org/dendrite/federationsender/types"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/gomatrixserverlib"
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)
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// Database stores information needed by the federation sender
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type Database struct {
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joinedHostsStatements
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roomStatements
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queuePDUsStatements
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queueJSONStatements
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sqlutil.PartitionOffsetStatements
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db *sql.DB
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}
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// NewDatabase opens a new database
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func NewDatabase(dataSourceName string) (*Database, error) {
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var result Database
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var err error
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cs, err := sqlutil.ParseFileURI(dataSourceName)
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if err != nil {
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return nil, err
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}
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if result.db, err = sqlutil.Open(sqlutil.SQLiteDriverName(), cs, nil); err != nil {
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return nil, err
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}
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if err = result.prepare(); err != nil {
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return nil, err
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}
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return &result, nil
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}
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func (d *Database) prepare() error {
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var err error
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if err = d.joinedHostsStatements.prepare(d.db); err != nil {
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return err
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}
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if err = d.roomStatements.prepare(d.db); err != nil {
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return err
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}
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if err = d.queuePDUsStatements.prepare(d.db); err != nil {
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return err
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}
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if err = d.queueJSONStatements.prepare(d.db); err != nil {
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return err
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}
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return d.PartitionOffsetStatements.Prepare(d.db, "federationsender")
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}
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// UpdateRoom updates the joined hosts for a room and returns what the joined
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// hosts were before the update, or nil if this was a duplicate message.
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// This is called when we receive a message from kafka, so we pass in
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// oldEventID and newEventID to check that we haven't missed any messages or
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// this isn't a duplicate message.
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func (d *Database) UpdateRoom(
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ctx context.Context,
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roomID, oldEventID, newEventID string,
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addHosts []types.JoinedHost,
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removeHosts []string,
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) (joinedHosts []types.JoinedHost, err error) {
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err = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
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err = d.insertRoom(ctx, txn, roomID)
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if err != nil {
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return err
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}
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lastSentEventID, err := d.selectRoomForUpdate(ctx, txn, roomID)
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if err != nil {
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return err
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}
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if lastSentEventID == newEventID {
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// We've handled this message before, so let's just ignore it.
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// We can only get a duplicate for the last message we processed,
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// so its enough just to compare the newEventID with lastSentEventID
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return nil
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}
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if lastSentEventID != "" && lastSentEventID != oldEventID {
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return types.EventIDMismatchError{
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DatabaseID: lastSentEventID, RoomServerID: oldEventID,
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}
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}
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joinedHosts, err = d.selectJoinedHostsWithTx(ctx, txn, roomID)
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if err != nil {
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return err
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}
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for _, add := range addHosts {
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err = d.insertJoinedHosts(ctx, txn, roomID, add.MemberEventID, add.ServerName)
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if err != nil {
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return err
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}
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}
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if err = d.deleteJoinedHosts(ctx, txn, removeHosts); err != nil {
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return err
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}
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return d.updateRoom(ctx, txn, roomID, newEventID)
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})
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return
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}
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// GetJoinedHosts returns the currently joined hosts for room,
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// as known to federationserver.
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// Returns an error if something goes wrong.
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func (d *Database) GetJoinedHosts(
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ctx context.Context, roomID string,
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) ([]types.JoinedHost, error) {
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return d.selectJoinedHosts(ctx, roomID)
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}
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// StoreJSON adds a JSON blob into the queue JSON table and returns
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// a NID. The NID will then be used when inserting the per-destination
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// metadata entries.
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func (d *Database) StoreJSON(
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ctx context.Context, js string,
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) (int64, error) {
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nid, err := d.insertQueueJSON(ctx, nil, js)
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if err != nil {
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return 0, fmt.Errorf("d.insertQueueJSON: %w", err)
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}
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return nid, nil
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}
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// AssociatePDUWithDestination creates an association that the
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// destination queues will use to determine which JSON blobs to send
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// to which servers.
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func (d *Database) AssociatePDUWithDestination(
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ctx context.Context,
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transactionID gomatrixserverlib.TransactionID,
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serverName gomatrixserverlib.ServerName,
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nids []int64,
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) error {
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return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
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for _, nid := range nids {
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if err := d.insertQueuePDU(
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ctx, // context
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txn, // SQL transaction
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transactionID, // transaction ID
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serverName, // destination server name
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nid, // NID from the federationsender_queue_json table
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); err != nil {
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return fmt.Errorf("d.insertQueueRetryStmt.ExecContext: %w", err)
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}
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}
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return nil
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})
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}
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// GetNextTransactionPDUs retrieves events from the database for
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// the next pending transaction, up to the limit specified.
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func (d *Database) GetNextTransactionPDUs(
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ctx context.Context,
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serverName gomatrixserverlib.ServerName,
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limit int,
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) (
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transactionID gomatrixserverlib.TransactionID,
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events []*gomatrixserverlib.HeaderedEvent,
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err error,
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) {
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err = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
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transactionID, err = d.selectQueueNextTransactionID(ctx, txn, serverName)
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if err != nil {
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return fmt.Errorf("d.selectQueueNextTransactionID: %w", err)
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}
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if transactionID == "" {
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return nil
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}
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nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, limit)
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if err != nil {
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return fmt.Errorf("d.selectQueuePDUs: %w", err)
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}
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blobs, err := d.selectQueueJSON(ctx, txn, nids)
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if err != nil {
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return fmt.Errorf("d.selectJSON: %w", err)
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}
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for _, blob := range blobs {
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var event gomatrixserverlib.HeaderedEvent
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if err := json.Unmarshal(blob, &event); err != nil {
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return fmt.Errorf("json.Unmarshal: %w", err)
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}
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events = append(events, &event)
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}
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return nil
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})
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return
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}
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// CleanTransactionPDUs cleans up all associated events for a
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// given transaction. This is done when the transaction was sent
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// successfully.
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func (d *Database) CleanTransactionPDUs(
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ctx context.Context,
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serverName gomatrixserverlib.ServerName,
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transactionID gomatrixserverlib.TransactionID,
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) error {
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return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
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nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, 50)
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if err != nil {
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return fmt.Errorf("d.selectQueuePDUs: %w", err)
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}
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if err = d.deleteQueueTransaction(ctx, txn, serverName, transactionID); err != nil {
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return fmt.Errorf("d.deleteQueueTransaction: %w", err)
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}
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var count int64
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var deleteNIDs []int64
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for _, nid := range nids {
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count, err = d.selectQueueReferenceJSONCount(ctx, txn, nid)
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if err != nil {
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return fmt.Errorf("d.selectQueueReferenceJSONCount: %w", err)
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}
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if count == 0 {
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deleteNIDs = append(deleteNIDs, nid)
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}
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}
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if len(deleteNIDs) > 0 {
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if err = d.deleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
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return fmt.Errorf("d.deleteQueueJSON: %w", err)
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}
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}
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return nil
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})
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}
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