#97 add As for Broker. #298

Merged
vtolstov merged 3 commits from kgorbunov/micro:#97 into master 2024-02-27 22:49:05 +03:00
2 changed files with 197 additions and 0 deletions

94
micro.go Normal file
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package micro
import (
"reflect"
"go.unistack.org/micro/v4/broker"
"go.unistack.org/micro/v4/client"
"go.unistack.org/micro/v4/codec"
"go.unistack.org/micro/v4/flow"
"go.unistack.org/micro/v4/fsm"
"go.unistack.org/micro/v4/logger"
"go.unistack.org/micro/v4/meter"
"go.unistack.org/micro/v4/register"
"go.unistack.org/micro/v4/resolver"
"go.unistack.org/micro/v4/router"
"go.unistack.org/micro/v4/selector"
"go.unistack.org/micro/v4/server"
"go.unistack.org/micro/v4/store"
"go.unistack.org/micro/v4/sync"
"go.unistack.org/micro/v4/tracer"
)
func As(b any, target any) bool {
if b == nil {
return false
}
if target == nil {
return false
}
val := reflect.ValueOf(target)
typ := val.Type()
if typ.Kind() != reflect.Ptr || val.IsNil() {
return false
}
targetType := typ.Elem()
if targetType.Kind() != reflect.Interface {
switch {
case targetType.Implements(brokerType):
break
case targetType.Implements(loggerType):
break
case targetType.Implements(clientType):
break
case targetType.Implements(serverType):
break
case targetType.Implements(codecType):
break
case targetType.Implements(flowType):
break
case targetType.Implements(fsmType):
break
case targetType.Implements(meterType):
break
case targetType.Implements(registerType):
break
case targetType.Implements(resolverType):
break
case targetType.Implements(selectorType):
break
case targetType.Implements(storeType):
break
case targetType.Implements(syncType):
break
case targetType.Implements(serviceType):
break
case targetType.Implements(routerType):
break
default:
return false
}
}
if reflect.TypeOf(b).AssignableTo(targetType) {
val.Elem().Set(reflect.ValueOf(b))
return true
}
return false
}
var brokerType = reflect.TypeOf((*broker.Broker)(nil)).Elem()
var loggerType = reflect.TypeOf((*logger.Logger)(nil)).Elem()
var clientType = reflect.TypeOf((*client.Client)(nil)).Elem()
var serverType = reflect.TypeOf((*server.Server)(nil)).Elem()
var codecType = reflect.TypeOf((*codec.Codec)(nil)).Elem()
var flowType = reflect.TypeOf((*flow.Flow)(nil)).Elem()
var fsmType = reflect.TypeOf((*fsm.FSM)(nil)).Elem()
var meterType = reflect.TypeOf((*meter.Meter)(nil)).Elem()
var registerType = reflect.TypeOf((*register.Register)(nil)).Elem()
var resolverType = reflect.TypeOf((*resolver.Resolver)(nil)).Elem()
var routerType = reflect.TypeOf((*router.Router)(nil)).Elem()
var selectorType = reflect.TypeOf((*selector.Selector)(nil)).Elem()
var storeType = reflect.TypeOf((*store.Store)(nil)).Elem()
var syncType = reflect.TypeOf((*sync.Sync)(nil)).Elem()
var tracerType = reflect.TypeOf((*tracer.Tracer)(nil)).Elem()
var serviceType = reflect.TypeOf((*Service)(nil)).Elem()

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micro_test.go Normal file
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package micro
import (
"context"
"fmt"
"reflect"
"testing"
"go.unistack.org/micro/v4/broker"
"go.unistack.org/micro/v4/fsm"
"go.unistack.org/micro/v4/options"
)
func TestAs(t *testing.T) {
var b *bro
broTarget := &bro{name: "kafka"}
fsmTarget := &fsmT{name: "fsm"}
testCases := []struct {
b any
target any
match bool
want any
}{
{
broTarget,
&b,
true,
broTarget,
},
{
nil,
&b,
false,
nil,
},
{
fsmTarget,
&b,
false,
nil,
},
}
for i, tc := range testCases {
name := fmt.Sprintf("%d:As(Errorf(..., %v), %v)", i, tc.b, tc.target)
// Clear the target pointer, in case it was set in a previous test.
rtarget := reflect.ValueOf(tc.target)
rtarget.Elem().Set(reflect.Zero(reflect.TypeOf(tc.target).Elem()))
t.Run(name, func(t *testing.T) {
match := As(tc.b, tc.target)
if match != tc.match {
t.Fatalf("match: got %v; want %v", match, tc.match)
}
if !match {
return
}
if got := rtarget.Elem().Interface(); got != tc.want {
t.Fatalf("got %#v, want %#v", got, tc.want)
}
})
}
}
type bro struct {
name string
}
func (p *bro) Name() string { return p.name }
func (p *bro) Init(opts ...options.Option) error { return nil }
// Options returns broker options
func (p *bro) Options() broker.Options { return broker.Options{} }
// Address return configured address
func (p *bro) Address() string { return "" }
// Connect connects to broker
func (p *bro) Connect(ctx context.Context) error { return nil }
// Disconnect disconnect from broker
func (p *bro) Disconnect(ctx context.Context) error { return nil }
// Publish message, msg can be single broker.Message or []broker.Message
func (p *bro) Publish(ctx context.Context, msg interface{}, opts ...options.Option) error { return nil }
// Subscribe subscribes to topic message via handler
func (p *bro) Subscribe(ctx context.Context, topic string, handler interface{}, opts ...options.Option) (broker.Subscriber, error) {
return nil, nil
}
// String type of broker
func (p *bro) String() string { return p.name }
type fsmT struct {
name string
}
func (f *fsmT) Start(ctx context.Context, a interface{}, o ...Option) (interface{}, error) {
return nil, nil
}
func (f *fsmT) Current() string { return f.name }
func (f *fsmT) Reset() {}
func (f *fsmT) State(s string, sf fsm.StateFunc) {}