-
Notifications
You must be signed in to change notification settings - Fork 0
/
aws.go
89 lines (74 loc) · 2.12 KB
/
aws.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
88
89
/*
Copyright © 2020 Dmitry Kisler <admin@dkisler.com>
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 bus
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/sns"
"github.com/aws/aws-sdk-go/service/sts"
)
// AWSClient defines the client to communicate with the SNS.
type AWSClient struct {
// AWS project ID
ProjectID string
// AWS region
Region string
Session *session.Session
Instance *sns.SNS
}
// getSession establishes the connection session.
func (c *AWSClient) getSession() error {
ses, err := session.NewSession(&aws.Config{
Region: aws.String(c.Region),
})
if err != nil {
return nil
}
c.Session = ses
return nil
}
// getIdentity fetches the project ID using AWS STS.
func (c *AWSClient) getProjectID() error {
stsClient := sts.New(c.Session)
identity, err := stsClient.GetCallerIdentity(nil)
if err != nil {
return err
}
c.ProjectID = *identity.Account
return nil
}
// Connect establishes connector to the message broker.
func (c *AWSClient) Connect() error {
if err := c.getSession(); err != nil {
return err
}
if err := c.getProjectID(); err != nil {
return err
}
c.Instance = sns.New(c.Session)
return nil
}
// getTopicArn fetches the topic ARN based on it's name.
func (c *AWSClient) getTopicArn(topic string) string {
return fmt.Sprintf("arn:aws:sns:%s:%s:%s", c.Region, c.ProjectID, topic)
}
// Push pushes the message to a topic.
func (c *AWSClient) Push(payload []byte, topic string) error {
t := c.getTopicArn(topic)
_, err := c.Instance.Publish(&sns.PublishInput{
Message: aws.String(string(payload)),
TopicArn: &t,
})
return err
}