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
|
package httprc_test
import (
"context"
"encoding/json"
"errors"
"fmt"
"net/http"
"net/http/httptest"
"time"
"github.com/lestrrat-go/httprc/v3"
)
// Example_err_not_ready_basic_handling demonstrates basic handling of ErrNotReady
func Example_err_not_ready_basic_handling() {
ctx := context.Background()
// Create a server that's slow to respond
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
time.Sleep(2 * time.Second)
json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
}))
defer srv.Close()
cl := httprc.NewClient()
ctrl, err := cl.Start(ctx)
if err != nil {
fmt.Println("Failed to start client:", err)
return
}
defer ctrl.Shutdown(time.Second)
resource, err := httprc.NewResource[map[string]string](
srv.URL,
httprc.JSONTransformer[map[string]string](),
)
if err != nil {
fmt.Println("Failed to create resource:", err)
return
}
// Add with timeout - will return ErrNotReady
addCtx, cancel := context.WithTimeout(ctx, 500*time.Millisecond)
defer cancel()
err = ctrl.Add(addCtx, resource)
if err != nil {
if errors.Is(err, httprc.ErrNotReady()) {
// Resource registered, will fetch in background
fmt.Println("Resource registered but not ready yet")
fmt.Println("Safe to continue with application startup")
return
}
// Registration failed
fmt.Println("Failed to register resource:", err)
return
}
// Resource registered AND ready with data
fmt.Println("Resource ready")
// OUTPUT:
// Resource registered but not ready yet
// Safe to continue with application startup
}
|
