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
|
package http
import (
"net/http"
"github.com/spiral/roadrunner/service"
"context"
"github.com/spiral/roadrunner"
"github.com/spiral/roadrunner/service/rpc"
)
// Name contains default svc name.
const Name = "http"
// must return true if request/response pair is handled withing the middleware.
type middleware func(w http.ResponseWriter, r *http.Request) bool
// Service manages rr, http servers.
type Service struct {
cfg *Config
lsns []func(event int, ctx interface{})
rr *roadrunner.Server
mdws []middleware
srv *Handler
http *http.Server
}
func (s *Service) AddMiddleware(m middleware) {
s.mdws = append(s.mdws, m)
}
// AddListener attaches server event watcher.
func (s *Service) AddListener(l func(event int, ctx interface{})) {
s.lsns = append(s.lsns, l)
}
// Init must return configure svc and return true if svc hasStatus enabled. Must return error in case of
// misconfiguration. Services must not be used without proper configuration pushed first.
func (s *Service) Init(cfg service.Config, c service.Container) (bool, error) {
config := &Config{}
if err := cfg.Unmarshal(config); err != nil {
return false, err
}
if !config.Enable {
return false, nil
}
if err := config.Valid(); err != nil {
return false, err
}
s.cfg = config
// registering http RPC interface
if r, ok := c.Get(rpc.Name); ok >= service.StatusConfigured {
if h, ok := r.(*rpc.Service); ok {
h.Register(Name, &rpcServer{s})
}
}
return true, nil
}
// Serve serves the svc.
func (s *Service) Serve() error {
rr := roadrunner.NewServer(s.cfg.Workers)
s.rr = rr
s.srv = &Handler{cfg: s.cfg, rr: s.rr}
s.http = &http.Server{Addr: s.cfg.Address}
s.rr.Listen(s.listener)
s.srv.Listen(s.listener)
if len(s.mdws) == 0 {
s.http.Handler = s.srv
} else {
s.http.Handler = s
}
if err := rr.Start(); err != nil {
return err
}
defer s.rr.Stop()
if err := s.http.ListenAndServe(); err != nil {
return err
}
return nil
}
// Stop stops the svc.
func (s *Service) Stop() {
if s.http == nil {
return
}
s.http.Shutdown(context.Background())
}
// middleware handles connection using set of mdws and rr PSR-7 server.
func (s *Service) ServeHTTP(w http.ResponseWriter, r *http.Request) {
for _, m := range s.mdws {
if m(w, r) {
return
}
}
s.srv.ServeHTTP(w, r)
}
func (s *Service) listener(event int, ctx interface{}) {
for _, l := range s.lsns {
l(event, ctx)
}
if event == roadrunner.EventServerFailure {
// attempting rr server restart
if err := s.rr.Start(); err != nil {
s.Stop()
}
}
}
|
