This repository has been archived by the owner on Feb 11, 2022. It is now read-only.
forked from aerospike/aerospike-client-go
-
Notifications
You must be signed in to change notification settings - Fork 0
/
recordset.go
78 lines (64 loc) · 2.01 KB
/
recordset.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
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
// Copyright 2013-2014 Aerospike, Inc.
//
// 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 aerospike
import (
"sync"
. "github.com/aerospike/aerospike-client-go/types/atomic"
)
// Recordset encapsulates the result of Scan and Query commands.
type Recordset struct {
// Records is a channel on which the resulting records will be sent back.
Records chan *Record
// Errors is a channel on which all errors will be sent back.
Errors chan error
wgGoroutines sync.WaitGroup
goroutines *AtomicInt
active *AtomicBool
cancelled chan struct{}
}
// NewRecordset generates a new RecordSet instance.
func newRecordset(recSize, goroutines int) *Recordset {
rs := &Recordset{
Records: make(chan *Record, recSize),
Errors: make(chan error, goroutines),
active: NewAtomicBool(true),
goroutines: NewAtomicInt(goroutines),
cancelled: make(chan struct{}),
}
rs.wgGoroutines.Add(goroutines)
return rs
}
// IsActive returns true if the operation hasn't been finished or cancelled.
func (rcs *Recordset) IsActive() bool {
return rcs.active.Get()
}
// Close all streams to different nodes.
func (rcs *Recordset) Close() {
// do it only once
if rcs.active.CompareAndToggle(true) {
// this will broadcast to all commands listening to the channel
close(rcs.cancelled)
// wait till all goroutines are done
rcs.wgGoroutines.Wait()
close(rcs.Records)
close(rcs.Errors)
}
}
func (rcs *Recordset) signalEnd() {
rcs.wgGoroutines.Done()
cnt := rcs.goroutines.DecrementAndGet()
if cnt == 0 {
rcs.Close()
}
}