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client.go
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client.go
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package tsf
import (
"context"
"fmt"
"sync"
"github.com/hisonsoft/tsf-go/balancer"
"github.com/hisonsoft/tsf-go/balancer/p2c"
"github.com/hisonsoft/tsf-go/breaker"
"github.com/hisonsoft/tsf-go/grpc/balancer/multi"
"github.com/hisonsoft/tsf-go/naming/consul"
"github.com/hisonsoft/tsf-go/pkg/meta"
"github.com/hisonsoft/tsf-go/pkg/sys/env"
"github.com/hisonsoft/tsf-go/route/composite"
"github.com/hisonsoft/tsf-go/route/lane"
"github.com/hisonsoft/tsf-go/tracing"
"github.com/hisonsoft/tsf-go/util"
"github.com/go-kratos/kratos/v2"
"github.com/go-kratos/kratos/v2/metadata"
"github.com/go-kratos/kratos/v2/middleware"
mmeta "github.com/go-kratos/kratos/v2/middleware/metadata"
hp2c "github.com/go-kratos/kratos/v2/selector/p2c"
"github.com/go-kratos/kratos/v2/transport"
tgrpc "github.com/go-kratos/kratos/v2/transport/grpc"
"github.com/go-kratos/kratos/v2/transport/http"
"google.golang.org/grpc"
)
type ClientOption func(*clientOpionts)
type clientOpionts struct {
breakerCfg *breaker.Config
breakerErrorHook func(ctx context.Context, operation string, err error) (success bool)
m []middleware.Middleware
balancer balancer.Balancer
enableDiscovery bool
}
func WithEnableDiscovery(enableDiscovery bool) ClientOption {
return func(o *clientOpionts) {
o.enableDiscovery = enableDiscovery
}
}
func WithBreakerConfig(cfg *breaker.Config) ClientOption {
return func(o *clientOpionts) {
o.breakerCfg = cfg
}
}
func WithBreakerErrorHook(h func(ctx context.Context, operation string, err error) (success bool)) ClientOption {
return func(o *clientOpionts) {
o.breakerErrorHook = h
}
}
func WithMiddlewares(m ...middleware.Middleware) ClientOption {
return func(o *clientOpionts) {
o.m = append(o.m, m...)
}
}
func WithBalancer(b balancer.Balancer) ClientOption {
return func(o *clientOpionts) {
o.balancer = b
}
}
func startClientContext(ctx context.Context, remoteServiceName string, l *lane.Lane, operation string) context.Context {
// 注入远端服务名
pairs := []meta.SysPair{
{Key: meta.DestKey(meta.ServiceName), Value: remoteServiceName},
{Key: meta.DestKey(meta.ServiceNamespace), Value: env.NamespaceID()},
}
var serviceName string
// 注入自己的服务名
k, _ := kratos.FromContext(ctx)
if k != nil {
serviceName = k.Name()
}
if res := meta.Sys(ctx, meta.ServiceName); res == nil {
pairs = append(pairs, meta.SysPair{Key: meta.ServiceName, Value: serviceName})
} else {
serviceName = res.(string)
}
pairs = append(pairs, meta.SysPair{Key: meta.DestKey(meta.Interface), Value: operation})
if laneID := l.GetLaneID(ctx); laneID != "" {
pairs = append(pairs, meta.SysPair{Key: meta.LaneID, Value: laneID})
}
ctx = meta.WithSys(ctx, pairs...)
md := metadata.Metadata{}
meta.RangeUser(ctx, func(key string, value string) {
md.Set(meta.UserKey(key), value)
})
meta.RangeSys(ctx, func(key string, value interface{}) {
if meta.IsOutgoing(key) {
if str, ok := value.(string); ok {
md.Set(key, str)
} else if fmtStr, ok := value.(fmt.Stringer); ok {
md.Set(key, fmtStr.String())
}
}
})
md.Set(meta.GroupID, env.GroupID())
md.Set(meta.ServiceNamespace, env.NamespaceID())
md.Set(meta.ApplicationID, env.ApplicationID())
md.Set(meta.ApplicationVersion, env.ProgVersion())
return metadata.MergeToClientContext(ctx, md)
}
func clientMiddleware() middleware.Middleware {
router := composite.DefaultComposite()
lane := router.Lane()
var remoteServiceName string
var once sync.Once
return func(handler middleware.Handler) middleware.Handler {
return func(ctx context.Context, req interface{}) (reply interface{}, err error) {
once.Do(func() {
tr, _ := transport.FromClientContext(ctx)
remoteServiceName, _ = util.ParseTarget(tr.Endpoint())
})
_, operation := ClientOperation(ctx)
ctx = startClientContext(ctx, remoteServiceName, lane, operation)
reply, err = handler(ctx, req)
return
}
}
}
// ClientMiddleware is client middleware
func ClientMiddleware() middleware.Middleware {
return middleware.Chain(clientMiddleware(), tracingClient(), clientMetricsMiddleware(), mmeta.Client())
}
func ClientGrpcOptions(copts ...ClientOption) []tgrpc.ClientOption {
var o clientOpionts = clientOpionts{
m: []middleware.Middleware{clientMiddleware(), tracingClient(), clientMetricsMiddleware(), mmeta.Client()},
enableDiscovery: true,
balancer: p2c.New(nil),
//balancer: random.New(),
//balancer: hash.New(),
}
for _, opt := range copts {
opt(&o)
}
var opts []tgrpc.ClientOption
// 将负载均衡模块注册至grpc
multi.Register(composite.DefaultComposite(), o.balancer)
opts = []tgrpc.ClientOption{
tgrpc.WithOptions(grpc.WithBalancerName(o.balancer.Schema()), grpc.WithStatsHandler(&tracing.ClientHandler{})),
tgrpc.WithMiddleware(o.m...),
}
if o.enableDiscovery {
opts = append(opts, tgrpc.WithDiscovery(consul.DefaultConsul()))
}
return opts
}
func ClientHTTPOptions(copts ...ClientOption) []http.ClientOption {
var o clientOpionts = clientOpionts{
m: []middleware.Middleware{clientMiddleware(), tracingClient(), clientMetricsMiddleware(), mmeta.Client()},
enableDiscovery: true,
balancer: p2c.New(nil),
//balancer: random.New(),
//balancer: hash.New(),
}
for _, opt := range copts {
opt(&o)
}
var opts []http.ClientOption
opts = []http.ClientOption{
http.WithSelector(
hp2c.New(nil),
),
http.WithMiddleware(o.m...),
}
if o.enableDiscovery {
opts = append(opts, http.WithDiscovery(consul.DefaultConsul()))
}
return opts
}