-
Notifications
You must be signed in to change notification settings - Fork 0
/
cacheentry.go
48 lines (41 loc) · 1.34 KB
/
cacheentry.go
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
// Copyright 2018 The auc Authors
// This file is part of the auc library.
//
// The auc library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The auc library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the auc library. If not, see <http://www.gnu.org/licenses/>.
package feed
import (
"bytes"
"context"
"time"
"github.com/ether-ark/etherark/swarm/storage"
)
const (
hasherCount = 8
feedsHashAlgorithm = storage.SHA3Hash
defaultRetrieveTimeout = 100 * time.Millisecond
)
// cacheEntry caches the last known update of a specific Swarm feed.
type cacheEntry struct {
Update
*bytes.Reader
lastKey storage.Address
}
// implements storage.LazySectionReader
func (r *cacheEntry) Size(ctx context.Context, _ chan bool) (int64, error) {
return int64(len(r.Update.data)), nil
}
//returns the feed's topic
func (r *cacheEntry) Topic() Topic {
return r.Feed.Topic
}