VOL-1967 move api-server to separate repository

Current with voltha-go acf0adaf2d91ae72b55192cc8a939e0485918d16

Change-Id: I000ea6be0789e20c922bd671562b58a7120892ae
diff --git a/internal/pkg/afrouter/arproxy.go b/internal/pkg/afrouter/arproxy.go
new file mode 100644
index 0000000..72641de
--- /dev/null
+++ b/internal/pkg/afrouter/arproxy.go
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+
+ * http://www.apache.org/licenses/LICENSE-2.0
+
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package afrouter
+
+// This file implements the ArouterPoxy struct and its
+// functions. The ArouterProxy is the top level object
+// for the affinity router.
+
+import (
+	"github.com/opencord/voltha-go/common/log"
+)
+
+// String names for display in error messages.
+var arProxy *ArouterProxy = nil
+
+type ArouterProxy struct {
+	servers map[string]*server // Defined in handler.go
+	api     *ArouterApi
+}
+
+// Create the routing proxy
+func NewArouterProxy(conf *Configuration) (*ArouterProxy, error) {
+	arProxy = &ArouterProxy{servers: make(map[string]*server)}
+	// Create all the servers listed in the configuration
+	for _, s := range conf.Servers {
+		if ns, err := newServer(&s); err != nil {
+			log.Error("Configuration failed")
+			return nil, err
+		} else {
+			arProxy.servers[ns.Name()] = ns
+		}
+	}
+
+	// TODO: The API is not mandatory, check if it's even in the config before
+	// trying to create it. If it isn't then don't bother but log a warning.
+	if api, err := newApi(&conf.Api, arProxy); err != nil {
+		return nil, err
+	} else {
+		arProxy.api = api
+	}
+
+	return arProxy, nil
+}
+
+// Start serving
+func (ap *ArouterProxy) ListenAndServe() error {
+
+	for _, srvr := range ap.servers {
+		ap.serve(srvr)
+	}
+	ap.api.serve()
+
+	// Just wait until we're done which only happens
+	// on a signal or an error.
+	err := <-doneChan
+
+	return err
+}
+
+func (ap *ArouterProxy) serve(srvr *server) {
+
+	// Start a serving thread
+	go func() {
+		srvr.running = true
+		if err := srvr.proxyServer.Serve(srvr.proxyListener); err != nil {
+			srvr.running = false
+			log.Error(err)
+			errChan <- err
+		}
+	}()
+}