nextTransaction creates a new transaction from the pending event queue and sends it. Returns true if a transaction was sent or false otherwise.
( pdus []*queuedPDU, edus []*queuedEDU, )
| 357 | // queue and sends it. Returns true if a transaction was sent or |
| 358 | // false otherwise. |
| 359 | func (oq *destinationQueue) nextTransaction( |
| 360 | pdus []*queuedPDU, |
| 361 | edus []*queuedEDU, |
| 362 | ) (bool, int, int, error) { |
| 363 | // If there's no projected transaction ID then generate one. If |
| 364 | // the transaction succeeds then we'll set it back to "" so that |
| 365 | // we generate a new one next time. If it fails, we'll preserve |
| 366 | // it so that we retry with the same transaction ID. |
| 367 | oq.transactionIDMutex.Lock() |
| 368 | if oq.transactionID == "" { |
| 369 | now := gomatrixserverlib.AsTimestamp(time.Now()) |
| 370 | oq.transactionID = gomatrixserverlib.TransactionID(fmt.Sprintf("%d-%d", now, oq.statistics.SuccessCount())) |
| 371 | } |
| 372 | oq.transactionIDMutex.Unlock() |
| 373 | |
| 374 | // Create the transaction. |
| 375 | t := gomatrixserverlib.Transaction{ |
| 376 | PDUs: []json.RawMessage{}, |
| 377 | EDUs: []gomatrixserverlib.EDU{}, |
| 378 | } |
| 379 | t.Origin = oq.origin |
| 380 | t.Destination = oq.destination |
| 381 | t.OriginServerTS = gomatrixserverlib.AsTimestamp(time.Now()) |
| 382 | t.TransactionID = oq.transactionID |
| 383 | |
| 384 | // If we didn't get anything from the database and there are no |
| 385 | // pending EDUs then there's nothing to do - stop here. |
| 386 | if len(pdus) == 0 && len(edus) == 0 { |
| 387 | return false, 0, 0, nil |
| 388 | } |
| 389 | |
| 390 | var pduReceipts []*shared.Receipt |
| 391 | var eduReceipts []*shared.Receipt |
| 392 | |
| 393 | // Go through PDUs that we retrieved from the database, if any, |
| 394 | // and add them into the transaction. |
| 395 | for _, pdu := range pdus { |
| 396 | if pdu == nil || pdu.pdu == nil { |
| 397 | continue |
| 398 | } |
| 399 | // Append the JSON of the event, since this is a json.RawMessage type in the |
| 400 | // gomatrixserverlib.Transaction struct |
| 401 | t.PDUs = append(t.PDUs, pdu.pdu.JSON()) |
| 402 | pduReceipts = append(pduReceipts, pdu.receipt) |
| 403 | } |
| 404 | |
| 405 | // Do the same for pending EDUS in the queue. |
| 406 | for _, edu := range edus { |
| 407 | if edu == nil || edu.edu == nil { |
| 408 | continue |
| 409 | } |
| 410 | t.EDUs = append(t.EDUs, *edu.edu) |
| 411 | eduReceipts = append(eduReceipts, edu.receipt) |
| 412 | } |
| 413 | |
| 414 | logrus.WithField("server_name", oq.destination).Debugf("Sending transaction %q containing %d PDUs, %d EDUs", t.TransactionID, len(t.PDUs), len(t.EDUs)) |
| 415 | |
| 416 | // Try to send the transaction to the destination server. |
no test coverage detected