-
Notifications
You must be signed in to change notification settings - Fork 74
/
streamname.go
87 lines (75 loc) · 2.48 KB
/
streamname.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
79
80
81
82
83
84
85
86
87
// Copyright 2015-2017 trivago GmbH
//
// 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 format
import (
"github.com/trivago/gollum/core"
)
// StreamName formatter
//
// This formatter prefixes data with the name of the current or previous stream.
//
// Parameters
//
// - UsePrevious: Set to true to use the name of the previous stream.
// By default this parameter is set to false.
//
// - Separator: Defines the separator string used between stream name and data.
// By default this parameter is set to ":".
//
// Examples
//
// This example prefixes the message with the most recent routing history.
//
// exampleProducer:
// Type: producer.Console
// Streams: "*"
// Modulators:
// - format.StreamName:
// Separator: ", "
// UsePrevious: true
// - format.StreamName:
// Separator: ": "
type StreamName struct {
core.SimpleFormatter `gollumdoc:"embed_type"`
separator []byte `config:"Separator" default:":"`
usePrevious bool `config:"UsePrevious"`
}
func init() {
core.TypeRegistry.Register(StreamName{})
}
// Configure initializes this formatter with values from a plugin config.
func (format *StreamName) Configure(conf core.PluginConfigReader) {
}
// ApplyFormatter update message payload
func (format *StreamName) ApplyFormatter(msg *core.Message) error {
streamName := format.getStreamName(msg)
content := format.GetAppliedContent(msg)
dataSize := len(streamName) + len(format.separator) + len(content)
payload := core.MessageDataPool.Get(dataSize)
offset := copy(payload, []byte(streamName))
offset += copy(payload[offset:], format.separator)
copy(payload[offset:], content)
format.SetAppliedContent(msg, payload)
return nil
}
func (format *StreamName) getStreamName(msg *core.Message) string {
var streamName string
switch {
case !format.usePrevious:
streamName = core.StreamRegistry.GetStreamName(msg.GetStreamID())
default:
streamName = core.StreamRegistry.GetStreamName(msg.GetPrevStreamID())
}
return streamName
}