1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
// 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 shared
import (
"context"
"database/sql"
"encoding/json"
"errors"
"fmt"
"github.com/matrix-org/gomatrixserverlib"
)
// 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,
receipt *Receipt,
) error {
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
for _, nid := range receipt.nids {
if err := d.FederationSenderQueuePDUs.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("InsertQueuePDU: %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,
receipt *Receipt,
err error,
) {
// Strictly speaking this doesn't need to be using the writer
// since we are only performing selects, but since we don't have
// a guarantee of transactional isolation, it's actually useful
// to know in SQLite mode that nothing else is trying to modify
// the database.
err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
transactionID, err = d.FederationSenderQueuePDUs.SelectQueuePDUNextTransactionID(ctx, txn, serverName)
if err != nil {
return fmt.Errorf("SelectQueuePDUNextTransactionID: %w", err)
}
if transactionID == "" {
return nil
}
nids, err := d.FederationSenderQueuePDUs.SelectQueuePDUs(ctx, txn, serverName, transactionID, limit)
if err != nil {
return fmt.Errorf("SelectQueuePDUs: %w", err)
}
receipt = &Receipt{
nids: nids,
}
retrieve := make([]int64, 0, len(nids))
for _, nid := range nids {
if event, ok := d.Cache.GetFederationSenderQueuedPDU(nid); ok {
events = append(events, event)
} else {
retrieve = append(retrieve, nid)
}
}
blobs, err := d.FederationSenderQueueJSON.SelectQueueJSON(ctx, txn, retrieve)
if err != nil {
return fmt.Errorf("SelectQueueJSON: %w", err)
}
for nid, 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)
d.Cache.StoreFederationSenderQueuedPDU(nid, &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) CleanPDUs(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
receipt *Receipt,
) error {
if receipt == nil {
return errors.New("expected receipt")
}
return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
if err := d.FederationSenderQueuePDUs.DeleteQueuePDUs(ctx, txn, serverName, receipt.nids); err != nil {
return err
}
var deleteNIDs []int64
for _, nid := range receipt.nids {
count, err := d.FederationSenderQueuePDUs.SelectQueuePDUReferenceJSONCount(ctx, txn, nid)
if err != nil {
return fmt.Errorf("SelectQueuePDUReferenceJSONCount: %w", err)
}
if count == 0 {
deleteNIDs = append(deleteNIDs, nid)
d.Cache.EvictFederationSenderQueuedPDU(nid)
}
}
if len(deleteNIDs) > 0 {
if err := d.FederationSenderQueueJSON.DeleteQueueJSON(ctx, txn, deleteNIDs); err != nil {
return fmt.Errorf("DeleteQueueJSON: %w", err)
}
}
return nil
})
}
// GetPendingPDUCount returns the number of PDUs waiting to be
// sent for a given servername.
func (d *Database) GetPendingPDUCount(
ctx context.Context,
serverName gomatrixserverlib.ServerName,
) (int64, error) {
return d.FederationSenderQueuePDUs.SelectQueuePDUCount(ctx, nil, serverName)
}
// GetPendingServerNames returns the server names that have PDUs
// waiting to be sent.
func (d *Database) GetPendingPDUServerNames(
ctx context.Context,
) ([]gomatrixserverlib.ServerName, error) {
return d.FederationSenderQueuePDUs.SelectQueuePDUServerNames(ctx, nil)
}
|
