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Federation sender refactor (#1621)

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* Refactor federation sender, again

* Clean up better

* Missing operators

* Try to get overflowed events from database

* Fix queries

* Log less

* Comments

* nil PDUs/EDUs shouldn't happen but guard against them for safety

* Tweak logging

* Fix transaction coalescing

* Update comments

* Check nils more

* Remove channels as they add extra complexity and possibly will deadlock

* Don't hold lock while sending transaction

* Less spam about sleeping queues

* Comments

* Bug-fixing

* Don't try to rehydrate twice

* Don't queue in memory for blacklisted destinations

* Don't queue in memory for blacklisted destinations

* Fix a couple of bugs

* Check for duplicates when pulling things out of the database

* Durable transactions, some more refactoring

* Revert "Durable transactions, some more refactoring"

This reverts commit 5daf924eaaefec5e4f7c12c16ca24e898de4adbb.

* Fix deadlock
This commit is contained in:
Neil Alexander 2020-12-09 10:03:22 +00:00 • committed by GitHub
parent e1d32e2ff1
commit f64c8822bc
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 294 additions and 267 deletions
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47
federationsender/storage/shared/storage_edus.go
View file

@ -33,16 +33,14 @@ func (d *Database) AssociateEDUWithDestination(
receipt *Receipt,
) error {
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
for _, nid := range receipt.nids {
if err := d.FederationSenderQueueEDUs.InsertQueueEDU(
ctx, // context
txn, // SQL transaction
"", // TODO: EDU type for coalescing
serverName, // destination server name
nid, // NID from the federationsender_queue_json table
); err != nil {
return fmt.Errorf("InsertQueueEDU: %w", err)
}
if err := d.FederationSenderQueueEDUs.InsertQueueEDU(
ctx, // context
txn, // SQL transaction
"", // TODO: EDU type for coalescing
serverName, // destination server name
receipt.nid, // NID from the federationsender_queue_json table
); err != nil {
return fmt.Errorf("InsertQueueEDU: %w", err)
}
return nil
})
@ -50,29 +48,25 @@ func (d *Database) AssociateEDUWithDestination(
// GetNextTransactionEDUs retrieves events from the database for
// the next pending transaction, up to the limit specified.
func (d *Database) GetNextTransactionEDUs(
func (d *Database) GetPendingEDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
limit int,
) (
edus []*gomatrixserverlib.EDU,
receipt *Receipt,
edus map[*Receipt]*gomatrixserverlib.EDU,
err error,
) {
edus = make(map[*Receipt]*gomatrixserverlib.EDU)
err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
nids, err := d.FederationSenderQueueEDUs.SelectQueueEDUs(ctx, txn, serverName, limit)
if err != nil {
return fmt.Errorf("SelectQueueEDUs: %w", err)
}
receipt = &Receipt{
nids: nids,
}
retrieve := make([]int64, 0, len(nids))
for _, nid := range nids {
if edu, ok := d.Cache.GetFederationSenderQueuedEDU(nid); ok {
edus = append(edus, edu)
edus[&Receipt{nid}] = edu
} else {
retrieve = append(retrieve, nid)
}
@ -83,12 +77,12 @@ func (d *Database) GetNextTransactionEDUs(
return fmt.Errorf("SelectQueueJSON: %w", err)
}
for _, blob := range blobs {
for nid, blob := range blobs {
var event gomatrixserverlib.EDU
if err := json.Unmarshal(blob, &event); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
edus = append(edus, &event)
edus[&Receipt{nid}] = &event
}
return nil
@ -101,19 +95,24 @@ func (d *Database) GetNextTransactionEDUs(
func (d *Database) CleanEDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
receipt *Receipt,
receipts []*Receipt,
) error {
if receipt == nil {
if len(receipts) == 0 {
return errors.New("expected receipt")
}
nids := make([]int64, len(receipts))
for i := range receipts {
nids[i] = receipts[i].nid
}
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
if err := d.FederationSenderQueueEDUs.DeleteQueueEDUs(ctx, txn, serverName, receipt.nids); err != nil {
if err := d.FederationSenderQueueEDUs.DeleteQueueEDUs(ctx, txn, serverName, nids); err != nil {
return err
}
var deleteNIDs []int64
for _, nid := range receipt.nids {
for _, nid := range nids {
count, err := d.FederationSenderQueueEDUs.SelectQueueEDUReferenceJSONCount(ctx, txn, nid)
if err != nil {
return fmt.Errorf("SelectQueueEDUReferenceJSONCount: %w", err)