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sender.go
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sender.go
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package mediator
import (
"context"
"github.com/pkg/errors"
"reflect"
)
type sender struct {
container SendContainer
}
func NewSender(container SendContainer) Sender {
return &sender{
container: container,
}
}
func (s sender) Send(ctx context.Context, request BaseRequest) (interface{}, error) {
handler, exists := s.container.resolve(request)
if !exists {
return nil, errors.Errorf("no handlers for request %T", request)
}
var requestHandlerBehavior RequestHandlerFunc = func() (interface{}, error) {
handlerMethod := reflect.ValueOf(handler).
MethodByName("Handle")
if !handlerMethod.IsValid() {
return nil, errors.Errorf("handler for request %T is not a RequestHandler", request)
}
// Create a slice of reflect.Value with ctx and notification as arguments
args := []reflect.Value{reflect.ValueOf(ctx), reflect.ValueOf(request)}
// Call the method with ctx and notification as arguments and get the returned error
result := handlerMethod.Call(args)
valueResult := result[0].Interface()
errorResult := result[1].Interface()
if errorResult != nil {
return valueResult, errorResult.(error)
}
return valueResult, nil
}
return s.container.executeWithPipeline(ctx, request, requestHandlerBehavior)
}