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
|
package util
import (
"context"
"fmt"
"net/http"
"strconv"
"strings"
"sync"
"time"
"google.golang.org/grpc"
"google.golang.org/grpc/keepalive"
)
var (
// cache grpc connections
grpcClients = make(map[string]*grpc.ClientConn)
grpcClientsLock sync.Mutex
)
func init() {
http.DefaultTransport.(*http.Transport).MaxIdleConnsPerHost = 1024
}
func NewGrpcServer(opts ...grpc.ServerOption) *grpc.Server {
var options []grpc.ServerOption
options = append(options, grpc.KeepaliveParams(keepalive.ServerParameters{
Time: 10 * time.Second, // wait time before ping if no activity
Timeout: 20 * time.Second, // ping timeout
}), grpc.KeepaliveEnforcementPolicy(keepalive.EnforcementPolicy{
MinTime: 60 * time.Second, // min time a client should wait before sending a ping
}))
for _, opt := range opts {
if opt != nil {
options = append(options, opt)
}
}
return grpc.NewServer(options...)
}
func GrpcDial(ctx context.Context, address string, opts ...grpc.DialOption) (*grpc.ClientConn, error) {
// opts = append(opts, grpc.WithBlock())
// opts = append(opts, grpc.WithTimeout(time.Duration(5*time.Second)))
var options []grpc.DialOption
options = append(options,
// grpc.WithInsecure(),
grpc.WithKeepaliveParams(keepalive.ClientParameters{
Time: 30 * time.Second, // client ping server if no activity for this long
Timeout: 20 * time.Second,
}))
for _, opt := range opts {
if opt != nil {
options = append(options, opt)
}
}
return grpc.DialContext(ctx, address, options...)
}
func WithCachedGrpcClient(ctx context.Context, fn func(*grpc.ClientConn) error, address string, opts ...grpc.DialOption) error {
grpcClientsLock.Lock()
existingConnection, found := grpcClients[address]
if found {
grpcClientsLock.Unlock()
err := fn(existingConnection)
if err != nil {
grpcClientsLock.Lock()
delete(grpcClients, address)
grpcClientsLock.Unlock()
existingConnection.Close()
}
return err
}
grpcConnection, err := GrpcDial(ctx, address, opts...)
if err != nil {
grpcClientsLock.Unlock()
return fmt.Errorf("fail to dial %s: %v", address, err)
}
grpcClients[address] = grpcConnection
grpcClientsLock.Unlock()
err = fn(grpcConnection)
if err != nil {
grpcClientsLock.Lock()
delete(grpcClients, address)
grpcClientsLock.Unlock()
grpcConnection.Close()
}
return err
}
func ParseServerToGrpcAddress(server string) (serverGrpcAddress string, err error) {
colonIndex := strings.LastIndex(server, ":")
if colonIndex < 0 {
return "", fmt.Errorf("server should have hostname:port format: %v", server)
}
port, parseErr := strconv.ParseUint(server[colonIndex+1:], 10, 64)
if parseErr != nil {
return "", fmt.Errorf("server port parse error: %v", parseErr)
}
grpcPort := int(port) + 10000
return fmt.Sprintf("%s:%d", server[:colonIndex], grpcPort), nil
}
func ServerToGrpcAddress(server string) (serverGrpcAddress string) {
hostnameAndPort := strings.Split(server, ":")
if len(hostnameAndPort) != 2 {
return fmt.Sprintf("unexpected server address: %s", server)
}
port, parseErr := strconv.ParseUint(hostnameAndPort[1], 10, 64)
if parseErr != nil {
return fmt.Sprintf("failed to parse port for %s:%s", hostnameAndPort[0], hostnameAndPort[1])
}
grpcPort := int(port) + 10000
return fmt.Sprintf("%s:%d", hostnameAndPort[0], grpcPort)
}
|
