/
main.go
142 lines (111 loc) · 3.97 KB
/
main.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
package main
import (
"context"
"encoding/json"
"flag"
"io"
"log/slog"
"net/http"
"os"
"github.com/diwise/cip-functions/internal/pkg/application"
"github.com/diwise/cip-functions/internal/pkg/application/functions"
"github.com/diwise/cip-functions/internal/pkg/infrastructure/database"
api "github.com/diwise/cip-functions/internal/pkg/presentation"
"github.com/diwise/cip-functions/pkg/messaging/events"
"github.com/diwise/messaging-golang/pkg/messaging"
"github.com/diwise/service-chassis/pkg/infrastructure/buildinfo"
"github.com/diwise/service-chassis/pkg/infrastructure/env"
"github.com/diwise/service-chassis/pkg/infrastructure/o11y"
"github.com/diwise/service-chassis/pkg/infrastructure/o11y/logging"
"github.com/diwise/service-chassis/pkg/infrastructure/o11y/tracing"
"go.opentelemetry.io/otel"
)
const serviceName string = "cip-functions"
var tracer = otel.Tracer(serviceName)
var functionsConfigPath string
func main() {
serviceVersion := buildinfo.SourceVersion()
ctx, _, cleanup := o11y.Init(context.Background(), serviceName, serviceVersion)
defer cleanup()
flag.StringVar(&functionsConfigPath, "functions", "/opt/diwise/config/cip-functions.csv", "configuration file for functions")
flag.Parse()
var err error
msgCtx := createMessagingContextOrDie(ctx)
defer msgCtx.Close()
storage := createDatabaseConnectionOrDie(ctx)
var configFile *os.File
if functionsConfigPath != "" {
configFile, err = os.Open(functionsConfigPath)
if err != nil {
fatal(ctx, "failed to open functions config file", err)
}
defer configFile.Close()
}
_, api_, err := initialize(ctx, msgCtx, configFile, storage)
if err != nil {
fatal(ctx, "initialization failed", err)
}
servicePort := env.GetVariableOrDefault(ctx, "SERVICE_PORT", "8080")
err = http.ListenAndServe(":"+servicePort, api_.Router())
if err != nil {
fatal(ctx, "failed to start request router", err)
}
}
func createMessagingContextOrDie(ctx context.Context) messaging.MsgContext {
logger := logging.GetFromContext(ctx)
config := messaging.LoadConfiguration(ctx, serviceName, logger)
messenger, err := messaging.Initialize(ctx, config)
if err != nil {
fatal(ctx, "failed to init messaging", err)
}
messenger.Start()
logger.Info("starting messaging service")
return messenger
}
func createDatabaseConnectionOrDie(ctx context.Context) database.Storage {
storage, err := database.Connect(ctx, database.LoadConfiguration(ctx))
if err != nil {
fatal(ctx, "database connect failed", err)
}
err = storage.Initialize(ctx)
if err != nil {
fatal(ctx, "database initialize failed", err)
}
return storage
}
func initialize(ctx context.Context, msgctx messaging.MsgContext, fconfig io.Reader, storage database.Storage) (application.App, api.API, error) {
fnRegistry, err := functions.NewRegistry(ctx, fconfig)
if err != nil {
return nil, nil, err
}
app := application.New(storage, msgctx, fnRegistry)
routingKey := "function.updated"
msgctx.RegisterTopicMessageHandler(routingKey, newTopicMessageHandler(app))
return app, api.New(ctx), nil
}
func newTopicMessageHandler(app application.App) messaging.TopicMessageHandler {
return func(ctx context.Context, itm messaging.IncomingTopicMessage, l *slog.Logger) {
var err error
ctx, span := tracer.Start(ctx, "receive-message")
defer func() { tracing.RecordAnyErrorAndEndSpan(err, span) }()
_, ctx, l = o11y.AddTraceIDToLoggerAndStoreInContext(span, l, ctx)
l.Debug("received message", "body", string(itm.Body()))
evt := events.FunctionUpdated{}
err = json.Unmarshal(itm.Body(), &evt)
if err != nil {
l.Error("unable to unmarshal incoming message", "err", err.Error())
return
}
l = l.With(slog.String("function_id", evt.ID))
ctx = logging.NewContextWithLogger(ctx, l)
err = app.FunctionUpdated(ctx, evt)
if err != nil {
l.Error("failed to handle message", "err", err.Error())
}
}
}
func fatal(ctx context.Context, msg string, err error) {
logger := logging.GetFromContext(ctx)
logger.Error(msg, "err", err.Error())
os.Exit(1)
}