-
Notifications
You must be signed in to change notification settings - Fork 0
/
eventbridge.go
148 lines (121 loc) · 3.28 KB
/
eventbridge.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
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
//
// Copyright (C) 2021 - 2022 Dmitry Kolesnikov
//
// This file may be modified and distributed under the terms
// of the Apache License Version 2.0. See the LICENSE file for details.
// https://github.com/fogfish/swarm
//
package eventbridge
import (
"context"
"fmt"
"github.com/aws/aws-lambda-go/events"
"github.com/aws/aws-lambda-go/lambda"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/eventbridge"
"github.com/aws/aws-sdk-go-v2/service/eventbridge/types"
"github.com/fogfish/swarm"
"github.com/fogfish/swarm/internal/kernel"
)
// EventBridge declares the subset of interface from AWS SDK used by the lib.
type EventBridge interface {
PutEvents(context.Context, *eventbridge.PutEventsInput, ...func(*eventbridge.Options)) (*eventbridge.PutEventsOutput, error)
}
type Client struct {
service EventBridge
bus string
config swarm.Config
}
func New(queue string, opts ...swarm.Option) (swarm.Broker, error) {
cli, err := NewEventBridge(queue, opts...)
if err != nil {
return nil, err
}
config := swarm.NewConfig()
for _, opt := range opts {
opt(&config)
}
starter := lambda.Start
type Mock interface{ Start(interface{}) }
if config.Service != nil {
service, ok := config.Service.(Mock)
if ok {
starter = service.Start
}
}
sls := spawner{f: starter, c: config}
return kernel.New(cli, sls, config), err
}
func NewEventBridge(bus string, opts ...swarm.Option) (*Client, error) {
config := swarm.NewConfig()
for _, opt := range opts {
opt(&config)
}
api, err := newService(&config)
if err != nil {
return nil, err
}
return &Client{
service: api,
bus: bus,
config: config,
}, nil
}
func newService(conf *swarm.Config) (EventBridge, error) {
if conf.Service != nil {
service, ok := conf.Service.(EventBridge)
if ok {
return service, nil
}
}
aws, err := config.LoadDefaultConfig(context.Background())
if err != nil {
return nil, swarm.ErrServiceIO.New(err)
}
return eventbridge.NewFromConfig(aws), nil
}
// Enq enqueues message to broker
func (cli *Client) Enq(bag swarm.Bag) error {
ctx, cancel := context.WithTimeout(context.Background(), cli.config.NetworkTimeout)
defer cancel()
ret, err := cli.service.PutEvents(ctx,
&eventbridge.PutEventsInput{
Entries: []types.PutEventsRequestEntry{
{
EventBusName: aws.String(cli.bus),
Source: aws.String(cli.config.Source),
DetailType: aws.String(bag.Ctx.Category),
Detail: aws.String(string(bag.Object)),
},
},
},
)
if err != nil {
return swarm.ErrEnqueue.New(err)
}
if ret.FailedEntryCount > 0 {
return fmt.Errorf("%v: %v", ret.Entries[0].ErrorCode, ret.Entries[0].ErrorMessage)
}
return nil
}
//------------------------------------------------------------------------------
type spawner struct {
c swarm.Config
f func(any)
}
func (s spawner) Spawn(k *kernel.Kernel) error {
s.f(
func(evt events.CloudWatchEvent) error {
bag := make([]swarm.Bag, 1)
bag[0] = swarm.Bag{
Ctx: swarm.NewContext(context.Background(), evt.DetailType, evt.ID),
Object: evt.Detail,
}
return k.Dispatch(bag, s.c.TimeToFlight)
},
)
return nil
}
func (s spawner) Ack(digest string) error { return nil }
func (s spawner) Ask() ([]swarm.Bag, error) { return nil, nil }