add router selector and network defaults

network/default.go

@@ -0,0 +1,95 @@
+package network
+
+import (
+	"sync"
+
+	"github.com/micro/go-micro/config/options"
+	"github.com/micro/go-micro/network/router"
+	"github.com/micro/go-micro/network/proxy"
+)
+
+type network struct {
+	options.Options
+
+	// router
+	r router.Router
+
+	// proxy
+	p proxy.Proxy
+
+	// id of this network
+	id string
+
+	// links maintained for this network
+	mtx sync.RWMutex
+	links []Link
+}
+
+type node struct {
+	*network
+
+	// address of this node
+	address string
+}
+
+
+type link struct {
+	// the embedded node
+	*node
+
+	// length and weight of the link
+	mtx sync.RWMutex
+	length, weight int
+}
+
+// network methods
+
+func (n *network) Id() string {
+	return n.id
+}
+
+func (n *network) Connect() (Node, error) {
+	return nil, nil
+}
+
+func (n *network) Peer(Network) (Link, error) {
+	return nil, nil
+}
+
+func (n *network) Links() ([]Link, error) {
+	n.mtx.RLock()
+	defer n.mtx.RUnlock()
+	return n.links, nil
+}
+
+// node methods
+
+func (n *node) Address() string {
+	return n.address
+}
+
+func (n *node) Close() error {
+	return nil
+}
+
+func (n *node) Accept() (*Message, error) {
+	return nil, nil
+}
+
+func (n *node) Send(*Message) error {
+	return nil
+}
+
+// link methods
+
+func (l *link) Length() int {
+	l.mtx.RLock()
+	defer l.mtx.RUnlock()
+	return l.length
+}
+
+func (l *link) Weight() int {
+	l.mtx.RLock()
+	defer l.mtx.RUnlock()
+	return l.weight
+}