First commit

pkg/registry/service_registry.go

@@ -0,0 +1,86 @@
+/*
+Copyright 2014 Google Inc. All rights reserved.
+
+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 registry
+
+import (
+	"encoding/json"
+	"net/url"
+	"strconv"
+	"strings"
+
+	. "github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/apiserver"
+)
+
+type ServiceRegistry interface {
+	ListServices() (ServiceList, error)
+	CreateService(svc Service) error
+	GetService(name string) (*Service, error)
+	DeleteService(name string) error
+	UpdateService(svc Service) error
+	UpdateEndpoints(e Endpoints) error
+}
+
+type ServiceRegistryStorage struct {
+	registry ServiceRegistry
+}
+
+func MakeServiceRegistryStorage(registry ServiceRegistry) apiserver.RESTStorage {
+	return &ServiceRegistryStorage{registry: registry}
+}
+
+// GetServiceEnvironmentVariables populates a list of environment variables that are use
+// in the container environment to get access to services.
+func GetServiceEnvironmentVariables(registry ServiceRegistry, machine string) ([]EnvVar, error) {
+	var result []EnvVar
+	services, err := registry.ListServices()
+	if err != nil {
+		return result, err
+	}
+	for _, service := range services.Items {
+		name := strings.ToUpper(service.ID) + "_SERVICE_PORT"
+		value := strconv.Itoa(service.Port)
+		result = append(result, EnvVar{Name: name, Value: value})
+	}
+	result = append(result, EnvVar{Name: "SERVICE_HOST", Value: machine})
+	return result, nil
+}
+
+func (sr *ServiceRegistryStorage) List(*url.URL) (interface{}, error) {
+	return sr.registry.ListServices()
+}
+
+func (sr *ServiceRegistryStorage) Get(id string) (interface{}, error) {
+	return sr.registry.GetService(id)
+}
+
+func (sr *ServiceRegistryStorage) Delete(id string) error {
+	return sr.registry.DeleteService(id)
+}
+
+func (sr *ServiceRegistryStorage) Extract(body string) (interface{}, error) {
+	var svc Service
+	err := json.Unmarshal([]byte(body), &svc)
+	return svc, err
+}
+
+func (sr *ServiceRegistryStorage) Create(obj interface{}) error {
+	return sr.registry.CreateService(obj.(Service))
+}
+
+func (sr *ServiceRegistryStorage) Update(obj interface{}) error {
+	return sr.registry.UpdateService(obj.(Service))
+}