/
kernel.go
79 lines (65 loc) · 1.89 KB
/
kernel.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
package app
import (
"os"
"github.com/go-kit/kit/log"
"github.com/go-kit/kit/transport"
httpTransport "github.com/go-kit/kit/transport/http"
"github.com/gorilla/mux"
"github.com/minchao/go-realworld/pkg/adapter/infra/persistence/memory"
"github.com/minchao/go-realworld/pkg/adapter/ui/rest"
"github.com/minchao/go-realworld/pkg/application/article"
articlePort "github.com/minchao/go-realworld/pkg/application/article/port"
)
type Kernel struct {
Logger log.Logger
Router *mux.Router
articleRepository articlePort.ArticleRepository
tagRepository articlePort.TagRepository
articleService article.UseCase
tagService article.TagUseCase
}
func NewKernel() *Kernel {
logger := log.NewLogfmtLogger(os.Stderr)
logger = log.With(logger, "ts", log.DefaultTimestampUTC)
logger = log.With(logger, "caller", log.DefaultCaller)
return &Kernel{
Logger: logger,
Router: mux.NewRouter(),
}
}
func (k *Kernel) Boot() error {
for _, fn := range []func() error{
k.initializePersistence,
k.initializeServices,
k.initializeREST,
} {
if err := fn(); err != nil {
return err
}
}
return nil
}
func (k *Kernel) initializePersistence() error {
adapter, err := memory.NewAdapter()
if err != nil {
return err
}
k.articleRepository = adapter.Article()
k.tagRepository = adapter.Tag()
return nil
}
func (k *Kernel) initializeServices() error {
k.tagService = article.NewTagService(k.tagRepository)
k.articleService = article.NewArticleService(k.articleRepository, k.tagService)
return nil
}
func (k *Kernel) initializeREST() error {
httpLogger := log.With(k.Logger, "component", "HTTP")
options := []httpTransport.ServerOption{
httpTransport.ServerErrorHandler(transport.NewLogErrorHandler(httpLogger)),
httpTransport.ServerErrorEncoder(rest.EncodeError),
}
rest.InitArticleHandler(k.Router, k.articleService, options)
rest.InitTagHandler(k.Router, k.tagService, options)
return nil
}