Example #1
0
func (r *rpcClient) Publish(ctx context.Context, p Publication, opts ...PublishOption) error {
	md, ok := c.GetMetadata(ctx)
	if !ok {
		md = make(map[string]string)
	}
	md["Content-Type"] = p.ContentType()

	// encode message body
	cf, err := r.newCodec(p.ContentType())
	if err != nil {
		return errors.InternalServerError("go.micro.client", err.Error())
	}
	b := &buffer{bytes.NewBuffer(nil)}
	if err := cf(b).Write(&codec.Message{Type: codec.Publication}, p.Message()); err != nil {
		return errors.InternalServerError("go.micro.client", err.Error())
	}
	r.once.Do(func() {
		r.opts.Broker.Connect()
	})

	return r.opts.Broker.Publish(p.Topic(), &broker.Message{
		Header: md,
		Body:   b.Bytes(),
	})
}
Example #2
0
func (r *rpcClient) stream(ctx context.Context, address string, req Request) (Streamer, error) {
	msg := &transport.Message{
		Header: make(map[string]string),
	}

	md, ok := c.GetMetadata(ctx)
	if ok {
		for k, v := range md {
			msg.Header[k] = v
		}
	}

	msg.Header["Content-Type"] = req.ContentType()

	cf, err := r.newCodec(req.ContentType())
	if err != nil {
		return nil, errors.InternalServerError("go.micro.client", err.Error())
	}

	c, err := r.opts.Transport.Dial(address, transport.WithStream(), transport.WithTimeout(r.opts.DialTimeout))
	if err != nil {
		return nil, errors.InternalServerError("go.micro.client", fmt.Sprintf("Error sending request: %v", err))
	}

	var once sync.Once
	stream := &rpcStream{
		context: ctx,
		request: req,
		once:    once,
		closed:  make(chan bool),
		codec:   newRpcPlusCodec(msg, c, cf),
	}

	ch := make(chan error, 1)

	go func() {
		ch <- stream.Send(req.Request())
	}()

	select {
	case err = <-ch:
	case <-time.After(r.opts.RequestTimeout):
		err = errors.New("go.micro.client", "request timeout", 408)
	}

	return stream, err
}
Example #3
0
func (dc *dcWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
	md, _ := c.GetMetadata(ctx)

	filter := func(services []*registry.Service) []*registry.Service {
		for _, service := range services {
			var nodes []*registry.Node
			for _, node := range service.Nodes {
				if node.Metadata["datacenter"] == md["datacenter"] {
					nodes = append(nodes, node)
				}
			}
			service.Nodes = nodes
		}
		return services
	}

	callOptions := append(opts, client.WithSelectOption(
		selector.Filter(filter),
	))

	fmt.Printf("[DC Wrapper] filtering for datacenter %s\n", md["datacenter"])
	return dc.Client.Call(ctx, req, rsp, callOptions...)
}
Example #4
0
func (l *logWrapper) Call(ctx context.Context, req client.Request, rsp interface{}, opts ...client.CallOption) error {
	md, _ := c.GetMetadata(ctx)
	fmt.Printf("[Log Wrapper] ctx: %v service: %s method: %s\n", md, req.Service(), req.Method())
	return l.Client.Call(ctx, req, rsp)
}
Example #5
0
func (e *Example) Call(ctx context.Context, req *example.Request, rsp *example.Response) error {
	md, _ := c.GetMetadata(ctx)
	log.Infof("Received Example.Call request with metadata: %v", md)
	rsp.Msg = server.DefaultOptions().Id + ": Hello " + req.Name
	return nil
}