mirror of
https://github.com/1f349/dendrite.git
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b189edf4f4
Replaced with types.HeaderedEvent _for now_. In reality we want to move them all to gmsl.Event and only use HeaderedEvent when we _need_ to bundle the version/event ID with the event (seriailsation boundaries, and even then only when we don't have the room version). Requires https://github.com/matrix-org/gomatrixserverlib/pull/373
155 lines
4.5 KiB
Go
155 lines
4.5 KiB
Go
// Copyright 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 shared
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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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"errors"
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"fmt"
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"github.com/matrix-org/dendrite/federationapi/storage/shared/receipt"
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"github.com/matrix-org/dendrite/roomserver/types"
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"github.com/matrix-org/gomatrixserverlib/spec"
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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) AssociatePDUWithDestinations(
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ctx context.Context,
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destinations map[spec.ServerName]struct{},
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dbReceipt *receipt.Receipt,
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) error {
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return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
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var err error
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for destination := range destinations {
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err = d.FederationQueuePDUs.InsertQueuePDU(
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ctx, // context
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txn, // SQL transaction
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"", // transaction ID
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destination, // destination server name
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dbReceipt.GetNID(), // NID from the federationapi_queue_json table
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)
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}
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return err
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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) GetPendingPDUs(
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ctx context.Context,
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serverName spec.ServerName,
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limit int,
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) (
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events map[*receipt.Receipt]*types.HeaderedEvent,
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err error,
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) {
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// Strictly speaking this doesn't need to be using the writer
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// since we are only performing selects, but since we don't have
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// a guarantee of transactional isolation, it's actually useful
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// to know in SQLite mode that nothing else is trying to modify
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// the database.
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events = make(map[*receipt.Receipt]*types.HeaderedEvent)
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err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
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nids, err := d.FederationQueuePDUs.SelectQueuePDUs(ctx, txn, serverName, limit)
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if err != nil {
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return fmt.Errorf("SelectQueuePDUs: %w", err)
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}
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retrieve := make([]int64, 0, len(nids))
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for _, nid := range nids {
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if event, ok := d.Cache.GetFederationQueuedPDU(nid); ok {
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newReceipt := receipt.NewReceipt(nid)
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events[&newReceipt] = event
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} else {
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retrieve = append(retrieve, nid)
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}
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}
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blobs, err := d.FederationQueueJSON.SelectQueueJSON(ctx, txn, retrieve)
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if err != nil {
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return fmt.Errorf("SelectQueueJSON: %w", err)
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}
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for nid, blob := range blobs {
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var event types.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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newReceipt := receipt.NewReceipt(nid)
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events[&newReceipt] = &event
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d.Cache.StoreFederationQueuedPDU(nid, &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) CleanPDUs(
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ctx context.Context,
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serverName spec.ServerName,
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receipts []*receipt.Receipt,
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) error {
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if len(receipts) == 0 {
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return errors.New("expected receipt")
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}
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nids := make([]int64, len(receipts))
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for i := range receipts {
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nids[i] = receipts[i].GetNID()
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}
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return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
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if err := d.FederationQueuePDUs.DeleteQueuePDUs(ctx, txn, serverName, nids); err != nil {
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return err
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}
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var deleteNIDs []int64
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for _, nid := range nids {
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count, err := d.FederationQueuePDUs.SelectQueuePDUReferenceJSONCount(ctx, txn, nid)
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if err != nil {
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return fmt.Errorf("SelectQueuePDUReferenceJSONCount: %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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d.Cache.EvictFederationQueuedPDU(nid)
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}
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}
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if len(deleteNIDs) > 0 {
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if err := d.FederationQueueJSON.DeleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
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return fmt.Errorf("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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// GetPendingServerNames returns the server names that have PDUs
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// waiting to be sent.
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func (d *Database) GetPendingPDUServerNames(
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ctx context.Context,
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) ([]spec.ServerName, error) {
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return d.FederationQueuePDUs.SelectQueuePDUServerNames(ctx, nil)
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}
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