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Persistent federation sender queues (PDUs) (#1173)

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* 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
This commit is contained in:
Neil Alexander 2020-07-01 11:46:38 +01:00 committed by GitHub
parent 6f49758b90
commit 42dd962425
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
12 changed files with 1049 additions and 102 deletions
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3
cmd/dendrite-demo-libp2p/main.go
View file

@ -130,8 +130,9 @@ func main() {
cfg.Database.ServerKey = config.DataSource(fmt.Sprintf("file:%s-serverkey.db", *instanceName))
cfg.Database.FederationSender = config.DataSource(fmt.Sprintf("file:%s-federationsender.db", *instanceName))
cfg.Database.AppService = config.DataSource(fmt.Sprintf("file:%s-appservice.db", *instanceName))
cfg.Database.PublicRoomsAPI = config.DataSource(fmt.Sprintf("file:%s-publicroomsa.db", *instanceName))
cfg.Database.PublicRoomsAPI = config.DataSource(fmt.Sprintf("file:%s-publicrooms.db", *instanceName))
cfg.Database.Naffka = config.DataSource(fmt.Sprintf("file:%s-naffka.db", *instanceName))
cfg.Database.CurrentState = config.DataSource(fmt.Sprintf("file:%s-currentstate.db", *instanceName))
if err = cfg.Derive(); err != nil {
panic(err)
}

3
cmd/dendrite-demo-yggdrasil/main.go
View file

@ -74,7 +74,8 @@ func main() {
cfg.Database.ServerKey = config.DataSource(fmt.Sprintf("file:%s-serverkey.db", *instanceName))
cfg.Database.FederationSender = config.DataSource(fmt.Sprintf("file:%s-federationsender.db", *instanceName))
cfg.Database.AppService = config.DataSource(fmt.Sprintf("file:%s-appservice.db", *instanceName))
cfg.Database.PublicRoomsAPI = config.DataSource(fmt.Sprintf("file:%s-publicroomsa.db", *instanceName))
cfg.Database.PublicRoomsAPI = config.DataSource(fmt.Sprintf("file:%s-publicrooms.db", *instanceName))
cfg.Database.CurrentState = config.DataSource(fmt.Sprintf("file:%s-currentstate.db", *instanceName))
cfg.Database.Naffka = config.DataSource(fmt.Sprintf("file:%s-naffka.db", *instanceName))
if err = cfg.Derive(); err != nil {
panic(err)

3
federationsender/federationsender.go
View file

@ -50,7 +50,8 @@ func NewInternalAPI(
statistics := &types.Statistics{}
queues := queue.NewOutgoingQueues(
base.Cfg.Matrix.ServerName, federation, rsAPI, statistics, &queue.SigningInfo{
federationSenderDB, base.Cfg.Matrix.ServerName, federation, rsAPI, statistics,
&queue.SigningInfo{
KeyID: base.Cfg.Matrix.KeyID,
PrivateKey: base.Cfg.Matrix.PrivateKey,
ServerName: base.Cfg.Matrix.ServerName,

267
federationsender/queue/destinationqueue.go
View file

@ -18,8 +18,10 @@ import (
"context"
"encoding/json"
"fmt"
"sync"
"time"
"github.com/matrix-org/dendrite/federationsender/storage"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/gomatrix"
@ -29,11 +31,14 @@ import (
"go.uber.org/atomic"
)
const maxPDUsPerTransaction = 50
// destinationQueue is a queue of events for a single destination.
// It is responsible for sending the events to the destination and
// ensures that only one request is in flight to a given destination
// at a time.
type destinationQueue struct {
db storage.Database
signing *SigningInfo
rsAPI api.RoomserverInternalAPI
client *gomatrixserverlib.FederationClient // federation client
@ -42,13 +47,15 @@ type destinationQueue struct {
running atomic.Bool // is the queue worker running?
backingOff atomic.Bool // true if we're backing off
statistics *types.ServerStatistics // statistics about this remote server
incomingPDUs chan *gomatrixserverlib.HeaderedEvent // PDUs to send
incomingEDUs chan *gomatrixserverlib.EDU // EDUs to send
incomingInvites chan *gomatrixserverlib.InviteV2Request // invites to send
lastTransactionIDs []gomatrixserverlib.TransactionID // last transaction ID
pendingPDUs []*gomatrixserverlib.HeaderedEvent // owned by backgroundSend
incomingEDUs chan *gomatrixserverlib.EDU // EDUs to send
transactionIDMutex sync.Mutex // protects transactionID
transactionID gomatrixserverlib.TransactionID // last transaction ID
transactionCount atomic.Int32 // how many events in this transaction so far
pendingPDUs atomic.Int32 // how many PDUs are waiting to be sent
pendingEDUs []*gomatrixserverlib.EDU // owned by backgroundSend
pendingInvites []*gomatrixserverlib.InviteV2Request // owned by backgroundSend
wakeServerCh chan bool // interrupts idle wait
retryServerCh chan bool // interrupts backoff
}
@ -79,15 +86,47 @@ func (oq *destinationQueue) retry() {
// Send event adds the event to the pending queue for the destination.
// If the queue is empty then it starts a background goroutine to
// start sending events to that destination.
func (oq *destinationQueue) sendEvent(ev *gomatrixserverlib.HeaderedEvent) {
func (oq *destinationQueue) sendEvent(nid int64) {
if oq.statistics.Blacklisted() {
// If the destination is blacklisted then drop the event.
return
}
// Create a transaction ID. We'll either do this if we don't have
// one made up yet, or if we've exceeded the number of maximum
// events allowed in a single tranaction. We'll reset the counter
// when we do.
oq.transactionIDMutex.Lock()
if oq.transactionID == "" || oq.transactionCount.Load() >= maxPDUsPerTransaction {
now := gomatrixserverlib.AsTimestamp(time.Now())
oq.transactionID = gomatrixserverlib.TransactionID(fmt.Sprintf("%d-%d", now, oq.statistics.SuccessCount()))
oq.transactionCount.Store(0)
}
oq.transactionIDMutex.Unlock()
// Create a database entry that associates the given PDU NID with
// this destination queue. We'll then be able to retrieve the PDU
// later.
if err := oq.db.AssociatePDUWithDestination(
context.TODO(),
oq.transactionID, // the current transaction ID
oq.destination, // the destination server name
[]int64{nid}, // NID from federationsender_queue_json table
); err != nil {
log.WithError(err).Errorf("failed to associate PDU NID %d with destination %q", nid, oq.destination)
return
}
// We've successfully added a PDU to the transaction so increase
// the counter.
oq.transactionCount.Add(1)
// If the queue isn't running at this point then start it.
if !oq.running.Load() {
go oq.backgroundSend()
}
oq.incomingPDUs <- ev
// Signal that we've sent a new PDU. This will cause the queue to
// wake up if it's asleep. The return to the Add function will only
// be 1 if the previous value was 0, e.g. nothing was waiting before.
if oq.pendingPDUs.Add(1) == 1 {
oq.wakeServerCh <- true
}
}
// sendEDU adds the EDU event to the pending queue for the destination.
@ -129,56 +168,48 @@ func (oq *destinationQueue) backgroundSend() {
defer oq.running.Store(false)
for {
// Wait either for incoming events, or until we hit an
// idle timeout.
select {
case pdu := <-oq.incomingPDUs:
// Ordering of PDUs is important so we add them to the end
// of the queue and they will all be added to transactions
// in order.
oq.pendingPDUs = append(oq.pendingPDUs, pdu)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingPDUs) > 0 {
oq.pendingPDUs = append(oq.pendingPDUs, <-oq.incomingPDUs)
// If we have nothing to do then wait either for incoming events, or
// until we hit an idle timeout.
if oq.pendingPDUs.Load() == 0 && len(oq.pendingEDUs) == 0 && len(oq.pendingInvites) == 0 {
select {
case <-oq.wakeServerCh:
// We were woken up because there are new PDUs waiting in the
// database.
case edu := <-oq.incomingEDUs:
// EDUs are handled in-memory for now. We will try to keep
// the ordering intact.
// TODO: Certain EDU types need persistence, e.g. send-to-device
oq.pendingEDUs = append(oq.pendingEDUs, edu)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingEDUs) > 0 {
oq.pendingEDUs = append(oq.pendingEDUs, <-oq.incomingEDUs)
}
case invite := <-oq.incomingInvites:
// There's no strict ordering requirement for invites like
// there is for transactions, so we put the invite onto the
// front of the queue. This means that if an invite that is
// stuck failing already, that it won't block our new invite
// from being sent.
oq.pendingInvites = append(
[]*gomatrixserverlib.InviteV2Request{invite},
oq.pendingInvites...,
)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingInvites) > 0 {
oq.pendingInvites = append(oq.pendingInvites, <-oq.incomingInvites)
}
case <-time.After(time.Second * 30):
// The worker is idle so stop the goroutine. It'll get
// restarted automatically the next time we have an event to
// send.
return
}
case edu := <-oq.incomingEDUs:
// Likewise for EDUs, although we should probably not try
// too hard with some EDUs (like typing notifications) after
// a certain amount of time has passed.
// TODO: think about EDU expiry some more
oq.pendingEDUs = append(oq.pendingEDUs, edu)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingEDUs) > 0 {
oq.pendingEDUs = append(oq.pendingEDUs, <-oq.incomingEDUs)
}
case invite := <-oq.incomingInvites:
// There's no strict ordering requirement for invites like
// there is for transactions, so we put the invite onto the
// front of the queue. This means that if an invite that is
// stuck failing already, that it won't block our new invite
// from being sent.
oq.pendingInvites = append(
[]*gomatrixserverlib.InviteV2Request{invite},
oq.pendingInvites...,
)
// If there are any more things waiting in the channel queue
// then read them. This is safe because we guarantee only
// having one goroutine per destination queue, so the channel
// isn't being consumed anywhere else.
for len(oq.incomingInvites) > 0 {
oq.pendingInvites = append(oq.pendingInvites, <-oq.incomingInvites)
}
case <-time.After(time.Second * 30):
// The worker is idle so stop the goroutine. It'll
// get restarted automatically the next time we
// get an event.
return
}
// If we are backing off this server then wait for the
@ -193,47 +224,31 @@ func (oq *destinationQueue) backgroundSend() {
oq.backingOff.Store(false)
}
// How many things do we have waiting?
numPDUs := len(oq.pendingPDUs)
numEDUs := len(oq.pendingEDUs)
numInvites := len(oq.pendingInvites)
// If we have pending PDUs or EDUs then construct a transaction.
if numPDUs > 0 || numEDUs > 0 {
if oq.pendingPDUs.Load() > 0 || len(oq.pendingEDUs) > 0 {
// Try sending the next transaction and see what happens.
transaction, terr := oq.nextTransaction(oq.pendingPDUs, oq.pendingEDUs, oq.statistics.SuccessCount())
transaction, terr := oq.nextTransaction(oq.pendingEDUs)
if terr != nil {
// We failed to send the transaction.
if giveUp := oq.statistics.Failure(); giveUp {
// It's been suggested that we should give up because
// the backoff has exceeded a maximum allowable value.
// It's been suggested that we should give up because the backoff
// has exceeded a maximum allowable value. Clean up the in-memory
// buffers at this point. The PDU clean-up is already on a defer.
oq.cleanPendingEDUs()
oq.cleanPendingInvites()
return
}
} else if transaction {
// If we successfully sent the transaction then clear out
// the pending events and EDUs.
// the pending events and EDUs, and wipe our transaction ID.
oq.statistics.Success()
// Reallocate so that the underlying arrays can be GC'd, as
// opposed to growing forever.
for i := 0; i < numPDUs; i++ {
oq.pendingPDUs[i] = nil
}
for i := 0; i < numEDUs; i++ {
oq.pendingEDUs[i] = nil
}
oq.pendingPDUs = append(
[]*gomatrixserverlib.HeaderedEvent{},
oq.pendingPDUs[numPDUs:]...,
)
oq.pendingEDUs = append(
[]*gomatrixserverlib.EDU{},
oq.pendingEDUs[numEDUs:]...,
)
// Clean up the in-memory buffers.
oq.cleanPendingEDUs()
}
}
// Try sending the next invite and see what happens.
if numInvites > 0 {
if len(oq.pendingInvites) > 0 {
sent, ierr := oq.nextInvites(oq.pendingInvites)
if ierr != nil {
// We failed to send the transaction so increase the
@ -249,59 +264,117 @@ func (oq *destinationQueue) backgroundSend() {
oq.statistics.Success()
// Reallocate so that the underlying array can be GC'd, as
// opposed to growing forever.
oq.pendingInvites = append(
[]*gomatrixserverlib.InviteV2Request{},
oq.pendingInvites[sent:]...,
)
oq.cleanPendingInvites()
}
}
}
}
// cleanPendingEDUs cleans out the pending EDU buffer, removing
// all references so that the underlying objects can be GC'd.
func (oq *destinationQueue) cleanPendingEDUs() {
for i := 0; i < len(oq.pendingEDUs); i++ {
oq.pendingEDUs[i] = nil
}
oq.pendingEDUs = []*gomatrixserverlib.EDU{}
}
// cleanPendingInvites cleans out the pending invite buffer,
// removing all references so that the underlying objects can
// be GC'd.
func (oq *destinationQueue) cleanPendingInvites() {
for i := 0; i < len(oq.pendingInvites); i++ {
oq.pendingInvites[i] = nil
}
oq.pendingInvites = []*gomatrixserverlib.InviteV2Request{}
}
// nextTransaction creates a new transaction from the pending event
// queue and sends it. Returns true if a transaction was sent or
// false otherwise.
func (oq *destinationQueue) nextTransaction(
pendingPDUs []*gomatrixserverlib.HeaderedEvent,
pendingEDUs []*gomatrixserverlib.EDU,
sentCounter uint32,
) (bool, error) {
// Before we do anything, we need to roll over the transaction
// ID that is being used to coalesce events into the next TX.
// Otherwise it's possible that we'll pick up an incomplete
// transaction and end up nuking the rest of the events at the
// cleanup stage.
oq.transactionIDMutex.Lock()
oq.transactionID = ""
oq.transactionIDMutex.Unlock()
oq.transactionCount.Store(0)
// Create the transaction.
t := gomatrixserverlib.Transaction{
PDUs: []json.RawMessage{},
EDUs: []gomatrixserverlib.EDU{},
}
now := gomatrixserverlib.AsTimestamp(time.Now())
t.TransactionID = gomatrixserverlib.TransactionID(fmt.Sprintf("%d-%d", now, sentCounter))
t.Origin = oq.origin
t.Destination = oq.destination
t.OriginServerTS = now
t.PreviousIDs = oq.lastTransactionIDs
if t.PreviousIDs == nil {
t.PreviousIDs = []gomatrixserverlib.TransactionID{}
t.OriginServerTS = gomatrixserverlib.AsTimestamp(time.Now())
// Ask the database for any pending PDUs from the next transaction.
// maxPDUsPerTransaction is an upper limit but we probably won't
// actually retrieve that many events.
txid, pdus, err := oq.db.GetNextTransactionPDUs(
context.TODO(), // context
oq.destination, // server name
maxPDUsPerTransaction, // max events to retrieve
)
if err != nil {
log.WithError(err).Errorf("failed to get next transaction PDUs for server %q", oq.destination)
return false, fmt.Errorf("oq.db.GetNextTransactionPDUs: %w", err)
}
oq.lastTransactionIDs = []gomatrixserverlib.TransactionID{t.TransactionID}
// If we didn't get anything from the database and there are no
// pending EDUs then there's nothing to do - stop here.
if len(pdus) == 0 && len(pendingEDUs) == 0 {
return false, nil
}
for _, pdu := range pendingPDUs {
// Pick out the transaction ID from the database. If we didn't
// get a transaction ID (i.e. because there are no PDUs but only
// EDUs) then generate a transaction ID.
t.TransactionID = txid
if t.TransactionID == "" {
now := gomatrixserverlib.AsTimestamp(time.Now())
t.TransactionID = gomatrixserverlib.TransactionID(fmt.Sprintf("%d-%d", now, oq.statistics.SuccessCount()))
}
// Go through PDUs that we retrieved from the database, if any,
// and add them into the transaction.
for _, pdu := range pdus {
// Append the JSON of the event, since this is a json.RawMessage type in the
// gomatrixserverlib.Transaction struct
t.PDUs = append(t.PDUs, (*pdu).JSON())
}
// Do the same for pending EDUS in the queue.
for _, edu := range pendingEDUs {
t.EDUs = append(t.EDUs, *edu)
}
logrus.WithField("server_name", oq.destination).Infof("Sending transaction %q containing %d PDUs, %d EDUs", t.TransactionID, len(t.PDUs), len(t.EDUs))
// Try to send the transaction to the destination server.
// TODO: we should check for 500-ish fails vs 400-ish here,
// since we shouldn't queue things indefinitely in response
// to a 400-ish error
_, err := oq.client.SendTransaction(context.TODO(), t)
_, err = oq.client.SendTransaction(context.TODO(), t)
switch e := err.(type) {
case nil:
// No error was returned so the transaction looks to have
// been successfully sent.
oq.pendingPDUs.Sub(int32(len(t.PDUs)))
// Clean up the transaction in the database.
if err = oq.db.CleanTransactionPDUs(
context.TODO(),
t.Destination,
t.TransactionID,
); err != nil {
log.WithError(err).Errorf("failed to clean transaction %q for server %q", t.TransactionID, t.Destination)
}
return true, nil
case gomatrix.HTTPError:
// We received a HTTP error back. In this instance we only

21
federationsender/queue/queue.go
View file

@ -15,10 +15,13 @@
package queue
import (
"context"
"crypto/ed25519"
"encoding/json"
"fmt"
"sync"
"github.com/matrix-org/dendrite/federationsender/storage"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/roomserver/api"
"github.com/matrix-org/gomatrixserverlib"
@ -29,6 +32,7 @@ import (
// OutgoingQueues is a collection of queues for sending transactions to other
// matrix servers
type OutgoingQueues struct {
db storage.Database
rsAPI api.RoomserverInternalAPI
origin gomatrixserverlib.ServerName
client *gomatrixserverlib.FederationClient
@ -40,6 +44,7 @@ type OutgoingQueues struct {
// NewOutgoingQueues makes a new OutgoingQueues
func NewOutgoingQueues(
db storage.Database,
origin gomatrixserverlib.ServerName,
client *gomatrixserverlib.FederationClient,
rsAPI api.RoomserverInternalAPI,
@ -47,6 +52,7 @@ func NewOutgoingQueues(
signing *SigningInfo,
) *OutgoingQueues {
return &OutgoingQueues{
db: db,
rsAPI: rsAPI,
origin: origin,
client: client,
@ -76,14 +82,15 @@ func (oqs *OutgoingQueues) getQueue(destination gomatrixserverlib.ServerName) *d
oq := oqs.queues[destination]
if oq == nil {
oq = &destinationQueue{
db: oqs.db,
rsAPI: oqs.rsAPI,
origin: oqs.origin,
destination: destination,
client: oqs.client,
statistics: oqs.statistics.ForServer(destination),
incomingPDUs: make(chan *gomatrixserverlib.HeaderedEvent, 128),
incomingEDUs: make(chan *gomatrixserverlib.EDU, 128),
incomingInvites: make(chan *gomatrixserverlib.InviteV2Request, 128),
wakeServerCh: make(chan bool, 128),
retryServerCh: make(chan bool),
signing: oqs.signing,
}
@ -115,8 +122,18 @@ func (oqs *OutgoingQueues) SendEvent(
"destinations": destinations, "event": ev.EventID(),
}).Info("Sending event")
headeredJSON, err := json.Marshal(ev)
if err != nil {
return fmt.Errorf("json.Marshal: %w", err)
}
nid, err := oqs.db.StoreJSON(context.TODO(), string(headeredJSON))
if err != nil {
return fmt.Errorf("sendevent: oqs.db.StoreJSON: %w", err)
}
for _, destination := range destinations {
oqs.getQueue(destination).sendEvent(ev)
oqs.getQueue(destination).sendEvent(nid)
}
return nil

5
federationsender/storage/interface.go
View file

@ -19,10 +19,15 @@ import (
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/gomatrixserverlib"
)
type Database interface {
internal.PartitionStorer
UpdateRoom(ctx context.Context, roomID, oldEventID, newEventID string, addHosts []types.JoinedHost, removeHosts []string) (joinedHosts []types.JoinedHost, err error)
GetJoinedHosts(ctx context.Context, roomID string) ([]types.JoinedHost, error)
StoreJSON(ctx context.Context, js string) (int64, error)
AssociatePDUWithDestination(ctx context.Context, transactionID gomatrixserverlib.TransactionID, serverName gomatrixserverlib.ServerName, nids []int64) error
GetNextTransactionPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, limit int) (gomatrixserverlib.TransactionID, []*gomatrixserverlib.HeaderedEvent, error)
CleanTransactionPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, transactionID gomatrixserverlib.TransactionID) error
}

111
federationsender/storage/postgres/queue_json_table.go Normal file
View file

@ -0,0 +1,111 @@
// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package postgres
import (
"context"
"database/sql"
"github.com/lib/pq"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
)
const queueJSONSchema = `
-- The federationsender_queue_json table contains event contents that
-- we failed to send.
CREATE TABLE IF NOT EXISTS federationsender_queue_json (
-- The JSON NID. This allows the federationsender_queue_retry table to
-- cross-reference to find the JSON blob.
json_nid BIGSERIAL,
-- The JSON body. Text so that we preserve UTF-8.
json_body TEXT NOT NULL
);
`
const insertJSONSQL = "" +
"INSERT INTO federationsender_queue_json (json_body)" +
" VALUES ($1)" +
" RETURNING json_nid"
const deleteJSONSQL = "" +
"DELETE FROM federationsender_queue_json WHERE json_nid = ANY($1)"
const selectJSONSQL = "" +
"SELECT json_nid, json_body FROM federationsender_queue_json" +
" WHERE json_nid = ANY($1)"
type queueJSONStatements struct {
insertJSONStmt *sql.Stmt
deleteJSONStmt *sql.Stmt
selectJSONStmt *sql.Stmt
}
func (s *queueJSONStatements) prepare(db *sql.DB) (err error) {
_, err = db.Exec(queueJSONSchema)
if err != nil {
return
}
if s.insertJSONStmt, err = db.Prepare(insertJSONSQL); err != nil {
return
}
if s.deleteJSONStmt, err = db.Prepare(deleteJSONSQL); err != nil {
return
}
if s.selectJSONStmt, err = db.Prepare(selectJSONSQL); err != nil {
return
}
return
}
func (s *queueJSONStatements) insertQueueJSON(
ctx context.Context, txn *sql.Tx, json string,
) (int64, error) {
stmt := sqlutil.TxStmt(txn, s.insertJSONStmt)
var lastid int64
if err := stmt.QueryRowContext(ctx, json).Scan(&lastid); err != nil {
return 0, err
}
return lastid, nil
}
func (s *queueJSONStatements) deleteQueueJSON(
ctx context.Context, txn *sql.Tx, nids []int64,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteJSONStmt)
_, err := stmt.ExecContext(ctx, pq.Int64Array(nids))
return err
}
func (s *queueJSONStatements) selectQueueJSON(
ctx context.Context, txn *sql.Tx, jsonNIDs []int64,
) (map[int64][]byte, error) {
blobs := map[int64][]byte{}
stmt := sqlutil.TxStmt(txn, s.selectJSONStmt)
rows, err := stmt.QueryContext(ctx, pq.Int64Array(jsonNIDs))
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "selectJSON: rows.close() failed")
for rows.Next() {
var nid int64
var blob []byte
if err = rows.Scan(&nid, &blob); err != nil {
return nil, err
}
blobs[nid] = blob
}
return blobs, err
}

169
federationsender/storage/postgres/queue_pdus_table.go Normal file
View file

@ -0,0 +1,169 @@
// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package postgres
import (
"context"
"database/sql"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
const queuePDUsSchema = `
CREATE TABLE IF NOT EXISTS federationsender_queue_pdus (
-- The transaction ID that was generated before persisting the event.
transaction_id TEXT NOT NULL,
-- The destination server that we will send the event to.
server_name TEXT NOT NULL,
-- The JSON NID from the federationsender_queue_pdus_json table.
json_nid BIGINT NOT NULL
);
CREATE UNIQUE INDEX IF NOT EXISTS federationsender_queue_pdus_pdus_json_nid_idx
ON federationsender_queue_pdus (json_nid, server_name);
`
const insertQueuePDUSQL = "" +
"INSERT INTO federationsender_queue_pdus (transaction_id, server_name, json_nid)" +
" VALUES ($1, $2, $3)"
const deleteQueueTransactionPDUsSQL = "" +
"DELETE FROM federationsender_queue_pdus WHERE server_name = $1 AND transaction_id = $2"
const selectQueueNextTransactionIDSQL = "" +
"SELECT transaction_id FROM federationsender_queue_pdus" +
" WHERE server_name = $1" +
" ORDER BY transaction_id ASC" +
" LIMIT 1"
const selectQueuePDUsByTransactionSQL = "" +
"SELECT json_nid FROM federationsender_queue_pdus" +
" WHERE server_name = $1 AND transaction_id = $2" +
" LIMIT $3"
const selectQueueReferenceJSONCountSQL = "" +
"SELECT COUNT(*) FROM federationsender_queue_pdus" +
" WHERE json_nid = $1"
type queuePDUsStatements struct {
insertQueuePDUStmt *sql.Stmt
deleteQueueTransactionPDUsStmt *sql.Stmt
selectQueueNextTransactionIDStmt *sql.Stmt
selectQueuePDUsByTransactionStmt *sql.Stmt
selectQueueReferenceJSONCountStmt *sql.Stmt
}
func (s *queuePDUsStatements) prepare(db *sql.DB) (err error) {
_, err = db.Exec(queuePDUsSchema)
if err != nil {
return
}
if s.insertQueuePDUStmt, err = db.Prepare(insertQueuePDUSQL); err != nil {
return
}
if s.deleteQueueTransactionPDUsStmt, err = db.Prepare(deleteQueueTransactionPDUsSQL); err != nil {
return
}
if s.selectQueueNextTransactionIDStmt, err = db.Prepare(selectQueueNextTransactionIDSQL); err != nil {
return
}
if s.selectQueuePDUsByTransactionStmt, err = db.Prepare(selectQueuePDUsByTransactionSQL); err != nil {
return
}
if s.selectQueueReferenceJSONCountStmt, err = db.Prepare(selectQueueReferenceJSONCountSQL); err != nil {
return
}
return
}
func (s *queuePDUsStatements) insertQueuePDU(
ctx context.Context,
txn *sql.Tx,
transactionID gomatrixserverlib.TransactionID,
serverName gomatrixserverlib.ServerName,
nid int64,
) error {
stmt := sqlutil.TxStmt(txn, s.insertQueuePDUStmt)
_, err := stmt.ExecContext(
ctx,
transactionID, // the transaction ID that we initially attempted
serverName, // destination server name
nid, // JSON blob NID
)
return err
}
func (s *queuePDUsStatements) deleteQueueTransaction(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteQueueTransactionPDUsStmt)
_, err := stmt.ExecContext(ctx, serverName, transactionID)
return err
}
func (s *queuePDUsStatements) selectQueueNextTransactionID(
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
) (gomatrixserverlib.TransactionID, error) {
var transactionID gomatrixserverlib.TransactionID
stmt := sqlutil.TxStmt(txn, s.selectQueueNextTransactionIDStmt)
err := stmt.QueryRowContext(ctx, serverName).Scan(&transactionID)
if err == sql.ErrNoRows {
return "", nil
}
return transactionID, err
}
func (s *queuePDUsStatements) selectQueueReferenceJSONCount(
ctx context.Context, txn *sql.Tx, jsonNID int64,
) (int64, error) {
var count int64
stmt := sqlutil.TxStmt(txn, s.selectQueueReferenceJSONCountStmt)
err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
if err == sql.ErrNoRows {
// It's acceptable for there to be no rows referencing a given
// JSON NID but it's not an error condition. Just return as if
// there's a zero count.
return 0, nil
}
return count, err
}
func (s *queuePDUsStatements) selectQueuePDUs(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
limit int,
) ([]int64, error) {
stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsByTransactionStmt)
rows, err := stmt.QueryContext(ctx, serverName, transactionID, limit)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
var result []int64
for rows.Next() {
var nid int64
if err = rows.Scan(&nid); err != nil {
return nil, err
}
result = append(result, nid)
}
return result, rows.Err()
}

135
federationsender/storage/postgres/storage.go
View file

@ -18,15 +18,20 @@ package postgres
import (
"context"
"database/sql"
"encoding/json"
"fmt"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
// Database stores information needed by the federation sender
type Database struct {
joinedHostsStatements
roomStatements
queuePDUsStatements
queueJSONStatements
sqlutil.PartitionOffsetStatements
db *sql.DB
}
@ -55,6 +60,14 @@ func (d *Database) prepare() error {
return err
}
if err = d.queuePDUsStatements.prepare(d.db); err != nil {
return err
}
if err = d.queueJSONStatements.prepare(d.db); err != nil {
return err
}
return d.PartitionOffsetStatements.Prepare(d.db, "federationsender")
}
@ -120,3 +133,125 @@ func (d *Database) GetJoinedHosts(
) ([]types.JoinedHost, error) {
return d.selectJoinedHosts(ctx, roomID)
}
// StoreJSON adds a JSON blob into the queue JSON table and returns
// a NID. The NID will then be used when inserting the per-destination
// metadata entries.
func (d *Database) StoreJSON(
ctx context.Context, js string,
) (int64, error) {
nid, err := d.insertQueueJSON(ctx, nil, js)
if err != nil {
return 0, fmt.Errorf("d.insertQueueJSON: %w", err)
}
return nid, nil
}
// AssociatePDUWithDestination creates an association that the
// destination queues will use to determine which JSON blobs to send
// to which servers.
func (d *Database) AssociatePDUWithDestination(
ctx context.Context,
transactionID gomatrixserverlib.TransactionID,
serverName gomatrixserverlib.ServerName,
nids []int64,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
for _, nid := range nids {
if err := d.insertQueuePDU(
ctx, // context
txn, // SQL transaction
transactionID, // transaction ID
serverName, // destination server name
nid, // NID from the federationsender_queue_json table
); err != nil {
return fmt.Errorf("d.insertQueueRetryStmt.ExecContext: %w", err)
}
}
return nil
})
}
// GetNextTransactionPDUs retrieves events from the database for
// the next pending transaction, up to the limit specified.
func (d *Database) GetNextTransactionPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
limit int,
) (
transactionID gomatrixserverlib.TransactionID,
events []*gomatrixserverlib.HeaderedEvent,
err error,
) {
err = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
transactionID, err = d.selectQueueNextTransactionID(ctx, txn, serverName)
if err != nil {
return fmt.Errorf("d.selectQueueNextTransactionID: %w", err)
}
if transactionID == "" {
return nil
}
nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, limit)
if err != nil {
return fmt.Errorf("d.selectQueuePDUs: %w", err)
}
blobs, err := d.selectQueueJSON(ctx, txn, nids)
if err != nil {
return fmt.Errorf("d.selectJSON: %w", err)
}
for _, blob := range blobs {
var event gomatrixserverlib.HeaderedEvent
if err := json.Unmarshal(blob, &event); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
events = append(events, &event)
}
return nil
})
return
}
// CleanTransactionPDUs cleans up all associated events for a
// given transaction. This is done when the transaction was sent
// successfully.
func (d *Database) CleanTransactionPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, 50)
if err != nil {
return fmt.Errorf("d.selectQueuePDUs: %w", err)
}
if err = d.deleteQueueTransaction(ctx, txn, serverName, transactionID); err != nil {
return fmt.Errorf("d.deleteQueueTransaction: %w", err)
}
var count int64
var deleteNIDs []int64
for _, nid := range nids {
count, err = d.selectQueueReferenceJSONCount(ctx, txn, nid)
if err != nil {
return fmt.Errorf("d.selectQueueReferenceJSONCount: %w", err)
}
if count == 0 {
deleteNIDs = append(deleteNIDs, nid)
}
}
if len(deleteNIDs) > 0 {
if err = d.deleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
return fmt.Errorf("d.deleteQueueJSON: %w", err)
}
}
return nil
})
}

132
federationsender/storage/sqlite3/queue_json_table.go Normal file
View file

@ -0,0 +1,132 @@
// Copyright 2017-2018 New Vector Ltd
// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlite3
import (
"context"
"database/sql"
"fmt"
"strings"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
)
const queueJSONSchema = `
-- The queue_retry_json table contains event contents that
-- we failed to send.
CREATE TABLE IF NOT EXISTS federationsender_queue_json (
-- The JSON NID. This allows the federationsender_queue_retry table to
-- cross-reference to find the JSON blob.
json_nid INTEGER PRIMARY KEY AUTOINCREMENT,
-- The JSON body. Text so that we preserve UTF-8.
json_body TEXT NOT NULL
);
`
const insertJSONSQL = "" +
"INSERT INTO federationsender_queue_json (json_body)" +
" VALUES ($1)"
const deleteJSONSQL = "" +
"DELETE FROM federationsender_queue_json WHERE json_nid IN ($1)"
const selectJSONSQL = "" +
"SELECT json_nid, json_body FROM federationsender_queue_json" +
" WHERE json_nid IN ($1)"
type queueJSONStatements struct {
insertJSONStmt *sql.Stmt
//deleteJSONStmt *sql.Stmt - prepared at runtime due to variadic
//selectJSONStmt *sql.Stmt - prepared at runtime due to variadic
}
func (s *queueJSONStatements) prepare(db *sql.DB) (err error) {
_, err = db.Exec(queueJSONSchema)
if err != nil {
return
}
if s.insertJSONStmt, err = db.Prepare(insertJSONSQL); err != nil {
return
}
return
}
func (s *queueJSONStatements) insertQueueJSON(
ctx context.Context, txn *sql.Tx, json string,
) (int64, error) {
stmt := sqlutil.TxStmt(txn, s.insertJSONStmt)
res, err := stmt.ExecContext(ctx, json)
if err != nil {
return 0, fmt.Errorf("stmt.QueryContext: %w", err)
}
lastid, err := res.LastInsertId()
if err != nil {
return 0, fmt.Errorf("res.LastInsertId: %w", err)
}
return lastid, nil
}
func (s *queueJSONStatements) deleteQueueJSON(
ctx context.Context, txn *sql.Tx, nids []int64,
) error {
deleteSQL := strings.Replace(deleteJSONSQL, "($1)", sqlutil.QueryVariadic(len(nids)), 1)
deleteStmt, err := txn.Prepare(deleteSQL)
if err != nil {
return fmt.Errorf("s.deleteQueueJSON s.db.Prepare: %w", err)
}
iNIDs := make([]interface{}, len(nids))
for k, v := range nids {
iNIDs[k] = v
}
stmt := sqlutil.TxStmt(txn, deleteStmt)
_, err = stmt.ExecContext(ctx, iNIDs...)
return err
}
func (s *queueJSONStatements) selectQueueJSON(
ctx context.Context, txn *sql.Tx, jsonNIDs []int64,
) (map[int64][]byte, error) {
selectSQL := strings.Replace(selectJSONSQL, "($1)", sqlutil.QueryVariadic(len(jsonNIDs)), 1)
selectStmt, err := txn.Prepare(selectSQL)
if err != nil {
return nil, fmt.Errorf("s.selectQueueJSON s.db.Prepare: %w", err)
}
iNIDs := make([]interface{}, len(jsonNIDs))
for k, v := range jsonNIDs {
iNIDs[k] = v
}
blobs := map[int64][]byte{}
stmt := sqlutil.TxStmt(txn, selectStmt)
rows, err := stmt.QueryContext(ctx, iNIDs...)
if err != nil {
return nil, fmt.Errorf("s.selectQueueJSON stmt.QueryContext: %w", err)
}
defer internal.CloseAndLogIfError(ctx, rows, "selectJSON: rows.close() failed")
for rows.Next() {
var nid int64
var blob []byte
if err = rows.Scan(&nid, &blob); err != nil {
return nil, fmt.Errorf("s.selectQueueJSON rows.Scan: %w", err)
}
blobs[nid] = blob
}
return blobs, err
}

167
federationsender/storage/sqlite3/queue_pdus_table.go Normal file
View file

@ -0,0 +1,167 @@
// Copyright 2017-2018 New Vector Ltd
// Copyright 2019-2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlite3
import (
"context"
"database/sql"
"github.com/matrix-org/dendrite/internal"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
const queuePDUsSchema = `
CREATE TABLE IF NOT EXISTS federationsender_queue_pdus (
-- The transaction ID that was generated before persisting the event.
transaction_id TEXT NOT NULL,
-- The domain part of the user ID the m.room.member event is for.
server_name TEXT NOT NULL,
-- The JSON NID from the federationsender_queue_pdus_json table.
json_nid BIGINT NOT NULL
);
CREATE UNIQUE INDEX IF NOT EXISTS federationsender_queue_pdus_pdus_json_nid_idx
ON federationsender_queue_pdus (json_nid, server_name);
`
const insertQueuePDUSQL = "" +
"INSERT INTO federationsender_queue_pdus (transaction_id, server_name, json_nid)" +
" VALUES ($1, $2, $3)"
const deleteQueueTransactionPDUsSQL = "" +
"DELETE FROM federationsender_queue_pdus WHERE server_name = $1 AND transaction_id = $2"
const selectQueueNextTransactionIDSQL = "" +
"SELECT transaction_id FROM federationsender_queue_pdus" +
" WHERE server_name = $1" +
" ORDER BY transaction_id ASC" +
" LIMIT 1"
const selectQueuePDUsByTransactionSQL = "" +
"SELECT json_nid FROM federationsender_queue_pdus" +
" WHERE server_name = $1 AND transaction_id = $2" +
" LIMIT $3"
const selectQueueReferenceJSONCountSQL = "" +
"SELECT COUNT(*) FROM federationsender_queue_pdus" +
" WHERE json_nid = $1"
type queuePDUsStatements struct {
insertQueuePDUStmt *sql.Stmt
deleteQueueTransactionPDUsStmt *sql.Stmt
selectQueueNextTransactionIDStmt *sql.Stmt
selectQueuePDUsByTransactionStmt *sql.Stmt
selectQueueReferenceJSONCountStmt *sql.Stmt
}
func (s *queuePDUsStatements) prepare(db *sql.DB) (err error) {
_, err = db.Exec(queuePDUsSchema)
if err != nil {
return
}
if s.insertQueuePDUStmt, err = db.Prepare(insertQueuePDUSQL); err != nil {
return
}
if s.deleteQueueTransactionPDUsStmt, err = db.Prepare(deleteQueueTransactionPDUsSQL); err != nil {
return
}
if s.selectQueueNextTransactionIDStmt, err = db.Prepare(selectQueueNextTransactionIDSQL); err != nil {
return
}
if s.selectQueuePDUsByTransactionStmt, err = db.Prepare(selectQueuePDUsByTransactionSQL); err != nil {
return
}
if s.selectQueueReferenceJSONCountStmt, err = db.Prepare(selectQueueReferenceJSONCountSQL); err != nil {
return
}
return
}
func (s *queuePDUsStatements) insertQueuePDU(
ctx context.Context,
txn *sql.Tx,
transactionID gomatrixserverlib.TransactionID,
serverName gomatrixserverlib.ServerName,
nid int64,
) error {
stmt := sqlutil.TxStmt(txn, s.insertQueuePDUStmt)
_, err := stmt.ExecContext(
ctx,
transactionID, // the transaction ID that we initially attempted
serverName, // destination server name
nid, // JSON blob NID
)
return err
}
func (s *queuePDUsStatements) deleteQueueTransaction(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
) error {
stmt := sqlutil.TxStmt(txn, s.deleteQueueTransactionPDUsStmt)
_, err := stmt.ExecContext(ctx, serverName, transactionID)
return err
}
func (s *queuePDUsStatements) selectQueueNextTransactionID(
ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
) (gomatrixserverlib.TransactionID, error) {
var transactionID gomatrixserverlib.TransactionID
stmt := sqlutil.TxStmt(txn, s.selectQueueNextTransactionIDStmt)
err := stmt.QueryRowContext(ctx, serverName).Scan(&transactionID)
if err == sql.ErrNoRows {
return "", nil
}
return transactionID, err
}
func (s *queuePDUsStatements) selectQueueReferenceJSONCount(
ctx context.Context, txn *sql.Tx, jsonNID int64,
) (int64, error) {
var count int64
stmt := sqlutil.TxStmt(txn, s.selectQueueReferenceJSONCountStmt)
err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
if err == sql.ErrNoRows {
return -1, nil
}
return count, err
}
func (s *queuePDUsStatements) selectQueuePDUs(
ctx context.Context, txn *sql.Tx,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
limit int,
) ([]int64, error) {
stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsByTransactionStmt)
rows, err := stmt.QueryContext(ctx, serverName, transactionID, limit)
if err != nil {
return nil, err
}
defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
var result []int64
for rows.Next() {
var nid int64
if err = rows.Scan(&nid); err != nil {
return nil, err
}
result = append(result, nid)
}
return result, rows.Err()
}

135
federationsender/storage/sqlite3/storage.go
View file

@ -18,17 +18,22 @@ package sqlite3
import (
"context"
"database/sql"
"encoding/json"
"fmt"
_ "github.com/mattn/go-sqlite3"
"github.com/matrix-org/dendrite/federationsender/types"
"github.com/matrix-org/dendrite/internal/sqlutil"
"github.com/matrix-org/gomatrixserverlib"
)
// Database stores information needed by the federation sender
type Database struct {
joinedHostsStatements
roomStatements
queuePDUsStatements
queueJSONStatements
sqlutil.PartitionOffsetStatements
db *sql.DB
}
@ -61,6 +66,14 @@ func (d *Database) prepare() error {
return err
}
if err = d.queuePDUsStatements.prepare(d.db); err != nil {
return err
}
if err = d.queueJSONStatements.prepare(d.db); err != nil {
return err
}
return d.PartitionOffsetStatements.Prepare(d.db, "federationsender")
}
@ -126,3 +139,125 @@ func (d *Database) GetJoinedHosts(
) ([]types.JoinedHost, error) {
return d.selectJoinedHosts(ctx, roomID)
}
// StoreJSON adds a JSON blob into the queue JSON table and returns
// a NID. The NID will then be used when inserting the per-destination
// metadata entries.
func (d *Database) StoreJSON(
ctx context.Context, js string,
) (int64, error) {
nid, err := d.insertQueueJSON(ctx, nil, js)
if err != nil {
return 0, fmt.Errorf("d.insertQueueJSON: %w", err)
}
return nid, nil
}
// AssociatePDUWithDestination creates an association that the
// destination queues will use to determine which JSON blobs to send
// to which servers.
func (d *Database) AssociatePDUWithDestination(
ctx context.Context,
transactionID gomatrixserverlib.TransactionID,
serverName gomatrixserverlib.ServerName,
nids []int64,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
for _, nid := range nids {
if err := d.insertQueuePDU(
ctx, // context
txn, // SQL transaction
transactionID, // transaction ID
serverName, // destination server name
nid, // NID from the federationsender_queue_json table
); err != nil {
return fmt.Errorf("d.insertQueueRetryStmt.ExecContext: %w", err)
}
}
return nil
})
}
// GetNextTransactionPDUs retrieves events from the database for
// the next pending transaction, up to the limit specified.
func (d *Database) GetNextTransactionPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
limit int,
) (
transactionID gomatrixserverlib.TransactionID,
events []*gomatrixserverlib.HeaderedEvent,
err error,
) {
err = sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
transactionID, err = d.selectQueueNextTransactionID(ctx, txn, serverName)
if err != nil {
return fmt.Errorf("d.selectQueueNextTransactionID: %w", err)
}
if transactionID == "" {
return nil
}
nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, limit)
if err != nil {
return fmt.Errorf("d.selectQueuePDUs: %w", err)
}
blobs, err := d.selectQueueJSON(ctx, txn, nids)
if err != nil {
return fmt.Errorf("d.selectJSON: %w", err)
}
for _, blob := range blobs {
var event gomatrixserverlib.HeaderedEvent
if err := json.Unmarshal(blob, &event); err != nil {
return fmt.Errorf("json.Unmarshal: %w", err)
}
events = append(events, &event)
}
return nil
})
return
}
// CleanTransactionPDUs cleans up all associated events for a
// given transaction. This is done when the transaction was sent
// successfully.
func (d *Database) CleanTransactionPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
transactionID gomatrixserverlib.TransactionID,
) error {
return sqlutil.WithTransaction(d.db, func(txn *sql.Tx) error {
nids, err := d.selectQueuePDUs(ctx, txn, serverName, transactionID, 50)
if err != nil {
return fmt.Errorf("d.selectQueuePDUs: %w", err)
}
if err = d.deleteQueueTransaction(ctx, txn, serverName, transactionID); err != nil {
return fmt.Errorf("d.deleteQueueTransaction: %w", err)
}
var count int64
var deleteNIDs []int64
for _, nid := range nids {
count, err = d.selectQueueReferenceJSONCount(ctx, txn, nid)
if err != nil {
return fmt.Errorf("d.selectQueueReferenceJSONCount: %w", err)
}
if count == 0 {
deleteNIDs = append(deleteNIDs, nid)
}
}
if len(deleteNIDs) > 0 {
if err = d.deleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
return fmt.Errorf("d.deleteQueueJSON: %w", err)
}
}
return nil
})
}