mirror of
https://github.com/hoernschen/dendrite.git
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124 lines
3.7 KiB
Go
124 lines
3.7 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 postgres
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import (
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"context"
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"database/sql"
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"fmt"
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"github.com/lib/pq"
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"github.com/matrix-org/dendrite/internal"
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"github.com/matrix-org/dendrite/internal/sqlutil"
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"github.com/matrix-org/dendrite/roomserver/storage/shared"
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"github.com/matrix-org/dendrite/roomserver/storage/tables"
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"github.com/matrix-org/dendrite/roomserver/types"
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)
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const stateSchema = `
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CREATE TABLE IF NOT EXISTS roomserver_state (
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state_nid BIGSERIAL PRIMARY KEY,
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room_nid bigint NOT NULL,
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event_nids bigint[] NOT NULL,
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UNIQUE (room_nid, event_nids),
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CONSTRAINT fk_room_id FOREIGN KEY(room_nid) REFERENCES roomserver_rooms(room_nid)
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);
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`
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const insertNewStateSnapshotSQL = "" +
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"INSERT INTO roomserver_state (room_nid, event_nids)" +
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" VALUES ($1, $2)" +
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" ON CONFLICT (room_nid, event_nids) DO UPDATE SET room_nid = $1" +
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" RETURNING state_nid"
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const bulkSelectNewStateSnapshotSQL = "" +
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"SELECT state_nid, event_nids" +
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" FROM roomserver_state WHERE state_nid = ANY($1)" +
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" ORDER BY state_nid"
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type stateStatements struct {
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insertStateStmt *sql.Stmt
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bulkSelectStateStmt *sql.Stmt
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}
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func NewPostgresStateTable(db *sql.DB) (tables.State, error) {
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s := &stateStatements{}
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_, err := db.Exec(stateSchema)
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if err != nil {
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return nil, err
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}
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return s, shared.StatementList{
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{&s.insertStateStmt, insertNewStateSnapshotSQL},
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{&s.bulkSelectStateStmt, bulkSelectNewStateSnapshotSQL},
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}.Prepare(db)
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}
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func (s *stateStatements) InsertState(
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ctx context.Context,
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txn *sql.Tx,
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roomNID types.RoomNID,
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eventNIDs []types.EventNID,
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) (types.StateSnapshotNID, error) {
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stmt := sqlutil.TxStmt(txn, s.insertStateStmt)
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var id int64
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var err error
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eventNIDs = types.DeduplicateEventNIDs(eventNIDs)
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if err = stmt.QueryRowContext(ctx, int64(roomNID), eventNIDsAsArray(eventNIDs)).Scan(&id); err != nil {
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return 0, fmt.Errorf("stmt.ExecContext: %w", err)
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}
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return types.StateSnapshotNID(id), err
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}
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func (s *stateStatements) BulkSelectState(
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ctx context.Context, stateNIDs []types.StateSnapshotNID,
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) (map[types.StateSnapshotNID][]types.EventNID, error) {
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rows, err := s.bulkSelectStateStmt.QueryContext(ctx, stateSnapshotNIDsAsArray(stateNIDs))
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if err != nil {
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return nil, err
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}
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defer internal.CloseAndLogIfError(ctx, rows, "bulkSelectStateBlockEntries: rows.close() failed")
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results := map[types.StateSnapshotNID][]types.EventNID{}
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for rows.Next() {
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var stateNID int64
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var eventNIDs pq.Int64Array
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if err = rows.Scan(&stateNID, &eventNIDs); err != nil {
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return nil, err
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}
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for _, id := range eventNIDs {
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results[types.StateSnapshotNID(stateNID)] = append(
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results[types.StateSnapshotNID(stateNID)],
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types.EventNID(id),
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)
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}
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}
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if err = rows.Err(); err != nil {
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return nil, fmt.Errorf("rows.Err: %w", err)
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}
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if len(results) != len(stateNIDs) {
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return nil, fmt.Errorf("storage: state data NIDs missing from the database (%d != %d)", len(results), len(stateNIDs))
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}
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return results, err
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}
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func stateSnapshotNIDsAsArray(stateSnapshotNIDs []types.StateSnapshotNID) pq.Int64Array {
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nids := make([]int64, len(stateSnapshotNIDs))
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for i := range stateSnapshotNIDs {
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nids[i] = int64(stateSnapshotNIDs[i])
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}
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return nids
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}
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