add server plugins feature and add zookeeper/etcd/consul registries

serverplugin/etcd_test.go

@@ -0,0 +1,38 @@
+// +build etcd
+
+package serverplugin
+
+import (
+	"testing"
+	"time"
+
+	metrics "github.com/rcrowley/go-metrics"
+	"github.com/smallnest/rpcx/server"
+)
+
+func TestEtcdRegistry(t *testing.T) {
+	s := &server.Server{}
+
+	r := &EtcdRegisterPlugin{
+		ServiceAddress: "tcp@127.0.0.1:8972",
+		EtcdServers:    []string{"127.0.0.1:2379"},
+		BasePath:       "/rpcx_test",
+		Metrics:        metrics.NewRegistry(),
+		Services:       make([]string, 1),
+		UpdateInterval: time.Minute,
+	}
+	err := r.Start()
+	if err != nil {
+		t.Fatal(err)
+	}
+	s.Plugins.Add(r)
+
+	s.RegisterName("Arith", new(Arith), "")
+	go s.Serve("tcp", "127.0.0.1:8972")
+	defer s.Close()
+
+	if len(r.Services) != 1 {
+		t.Fatal("failed to register services in etcd")
+	}
+
+}