func()

in protocol/dubbo3/dubbo3_invoker.go [157:234]
63 lines of code
13 McCabe index (conditional complexity)

func (di *DubboInvoker) Invoke(ctx context.Context, invocation protocol.Invocation) protocol.Result {
	var (
		result protocol.RPCResult
	)

	if !di.BaseInvoker.IsAvailable() {
		// Generally, the case will not happen, because the invoker has been removed
		// from the invoker list before destroy,so no new request will enter the destroyed invoker
		logger.Warnf("this dubboInvoker is destroyed")
		result.Err = protocol.ErrDestroyedInvoker
		return &result
	}

	di.clientGuard.RLock()
	defer di.clientGuard.RUnlock()

	if di.client == nil {
		result.Err = protocol.ErrClientClosed
		return &result
	}

	if !di.BaseInvoker.IsAvailable() {
		// Generally, the case will not happen, because the invoker has been removed
		// from the invoker list before destroy,so no new request will enter the destroyed invoker
		logger.Warnf("this grpcInvoker is destroying")
		result.Err = protocol.ErrDestroyedInvoker
		return &result
	}

	for _, k := range attachmentKey {
		var paramKey string
		switch k {
		case tripleConstant.TripleServiceGroup:
			paramKey = constant.GroupKey
		case tripleConstant.TripleServiceVersion:
			paramKey = constant.VersionKey
		default:
			paramKey = k
		}

		if v := di.GetURL().GetParam(paramKey, ""); len(v) > 0 {
			invocation.SetAttachment(k, v)
		}
	}

	// append interface id to ctx
	gRPCMD := make(metadata.MD, 0)
	// triple will convert attachment value to []string
	for k, v := range invocation.Attachments() {
		if str, ok := v.(string); ok {
			gRPCMD.Set(k, str)
			continue
		}
		if str, ok := v.([]string); ok {
			gRPCMD.Set(k, str...)
			continue
		}
		logger.Warnf("[Triple Protocol]Triple attachment value with key = %s is invalid, which should be string or []string", k)
	}
	ctx = metadata.NewOutgoingContext(ctx, gRPCMD)
	ctx = context.WithValue(ctx, tripleConstant.InterfaceKey, di.BaseInvoker.GetURL().GetParam(constant.InterfaceKey, ""))
	in := make([]reflect.Value, 0, 16)
	in = append(in, reflect.ValueOf(ctx))

	if len(invocation.ParameterValues()) > 0 {
		in = append(in, invocation.ParameterValues()...)
	}

	methodName := invocation.MethodName()
	triAttachmentWithErr := di.client.Invoke(methodName, in, invocation.Reply())
	result.Err = triAttachmentWithErr.GetError()
	result.Attrs = make(map[string]any)
	for k, v := range triAttachmentWithErr.GetAttachments() {
		result.Attrs[k] = v
	}
	result.Rest = invocation.Reply()
	return &result
}