dependency/catalog_node.go
func (d *CatalogNodeQuery) Fetch(clients *ClientSet, opts *QueryOptions) (interface{}, *ResponseMetadata, error) {
	select {
	case <-d.stopCh:
		return nil, nil, ErrStopped
	default:
	}

	opts = opts.Merge(&QueryOptions{
		Datacenter: d.dc,
	})

	// Grab the name
	name := d.name

	if name == "" {
		log.Printf("[TRACE] %s: getting local agent name", d)
		var err error
		name, err = clients.Consul().Agent().NodeName()
		if err != nil {
			return nil, nil, errors.Wrapf(err, d.String())
		}
	}

	log.Printf("[TRACE] %s: GET %s", d, &url.URL{
		Path:     "/v1/catalog/node/" + name,
		RawQuery: opts.String(),
	})
	node, qm, err := clients.Consul().Catalog().Node(name, opts.ToConsulOpts())
	if err != nil {
		return nil, nil, errors.Wrap(err, d.String())
	}

	log.Printf("[TRACE] %s: returned response", d)

	rm := &ResponseMetadata{
		LastIndex:   qm.LastIndex,
		LastContact: qm.LastContact,
	}

	if node == nil {
		log.Printf("[WARN] %s: no node exists with the name %q", d, name)
		var node CatalogNode
		return &node, rm, nil
	}

	services := make([]*CatalogNodeService, 0, len(node.Services))
	for _, v := range node.Services {
		services = append(services, &CatalogNodeService{
			ID:                v.ID,
			Service:           v.Service,
			Tags:              ServiceTags(deepCopyAndSortTags(v.Tags)),
			Meta:              v.Meta,
			Port:              v.Port,
			Address:           v.Address,
			EnableTagOverride: v.EnableTagOverride,
		})
	}
	sort.Stable(ByService(services))

	detail := &CatalogNode{
		Node: &Node{
			ID:              node.Node.ID,
			Node:            node.Node.Node,
			Address:         node.Node.Address,
			Datacenter:      node.Node.Datacenter,
			TaggedAddresses: node.Node.TaggedAddresses,
			Meta:            node.Node.Meta,
		},
		Services: services,
	}

	return detail, rm, nil
}
func (d *CatalogNodeQuery) Fetch(clients *ClientSet, opts *QueryOptions) (interface{}, *ResponseMetadata, error) {
	select {
	case <-d.stopCh:
		return nil, nil, ErrStopped
	default:
	}

	opts = opts.Merge(&QueryOptions{
		Datacenter: d.dc,
	})

	// Grab the name
	name := d.name

	if name == "" {
		log.Printf("[TRACE] %s: getting local agent name", d)
		var err error
		name, err = clients.Consul().Agent().NodeName()
		if err != nil {
			return nil, nil, errors.Wrapf(err, d.String())
		}
	}

	log.Printf("[TRACE] %s: GET %s", d, &url.URL{
		Path:     "/v1/catalog/node/" + name,
		RawQuery: opts.String(),
	})
	node, qm, err := clients.Consul().Catalog().Node(name, opts.ToConsulOpts())
	if err != nil {
		return nil, nil, errors.Wrap(err, d.String())
	}

	log.Printf("[TRACE] %s: returned response", d)

	rm := &ResponseMetadata{
		LastIndex:   qm.LastIndex,
		LastContact: qm.LastContact,
	}

	if node == nil {
		log.Printf("[WARN] %s: no node exists with the name %q", d, name)
		var node CatalogNode
		return &node, rm, nil
	}

	services := make([]*CatalogNodeService, 0, len(node.Services))
	for _, v := range node.Services {
		services = append(services, &CatalogNodeService{
			ID:                v.ID,
			Service:           v.Service,
			Tags:              ServiceTags(deepCopyAndSortTags(v.Tags)),
			Meta:              v.Meta,
			Port:              v.Port,
			Address:           v.Address,
			EnableTagOverride: v.EnableTagOverride,
		})
	}
	sort.Stable(ByService(services))

	detail := &CatalogNode{
		Node: &Node{
			ID:              node.Node.ID,
			Node:            node.Node.Node,
			Address:         node.Node.Address,
			Datacenter:      node.Node.Datacenter,
			TaggedAddresses: node.Node.TaggedAddresses,
			Meta:            node.Node.Meta,
		},
		Services: services,
	}

	return detail, rm, nil
}
// Fetch queries the Consul API defined by the given client and returns a
// of CatalogNode object.