Add plugins (#27)

plugins/wasm-go/pkg/wrapper/cluster_wrapper.go

@@ -0,0 +1,112 @@
+// Copyright (c) 2022 Alibaba Group Holding Ltd.
+//
+// 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 wrapper
+
+import (
+	"fmt"
+	"strings"
+)
+
+type Cluster interface {
+	ClusterName() string
+	HostName() string
+}
+
+type K8sCluster struct {
+	ServiceName string
+	Namespace   string
+	Port        int64
+	Version     string
+	Host        string
+}
+
+func (c K8sCluster) ClusterName() string {
+	namespace := "default"
+	if c.Namespace != "" {
+		namespace = c.Namespace
+	}
+	return fmt.Sprintf("outbound|%d|%s|%s.%s.svc.cluster.local",
+		c.Port, c.Version, c.ServiceName, namespace)
+}
+
+func (c K8sCluster) HostName() string {
+	if c.Host != "" {
+		return c.Host
+	}
+	return fmt.Sprintf("%s.%s.svc.cluster.local", c.ServiceName, c.Namespace)
+}
+
+type NacosCluster struct {
+	ServiceName string
+	// use DEFAULT-GROUP by default
+	Group       string
+	NamespaceID string
+	Port        int64
+	// set true if use edas/sae registry
+	IsExtRegistry bool
+	Version       string
+	Host          string
+}
+
+func (c NacosCluster) ClusterName() string {
+	group := "DEFAULT-GROUP"
+	if c.Group != "" {
+		group = strings.ReplaceAll(c.Group, "_", "-")
+	}
+	tail := "nacos"
+	if c.IsExtRegistry {
+		tail += "-ext"
+	}
+	return fmt.Sprintf("outbound|%d|%s|%s.%s.%s.%s",
+		c.Port, c.Version, c.ServiceName, group, c.NamespaceID, tail)
+}
+
+func (c NacosCluster) HostName() string {
+	if c.Host != "" {
+		return c.Host
+	}
+	return c.ServiceName
+}
+
+type StaticIpCluster struct {
+	ServiceName string
+	Port        int64
+	Host        string
+}
+
+func (c StaticIpCluster) ClusterName() string {
+	return fmt.Sprintf("outbound|%d||%s.static", c.Port, c.ServiceName)
+}
+
+func (c StaticIpCluster) HostName() string {
+	if c.Host != "" {
+		return c.Host
+	}
+	return c.ServiceName
+}
+
+type DnsCluster struct {
+	ServiceName string
+	Domain      string
+	Port        int64
+}
+
+func (c DnsCluster) ClusterName() string {
+	return fmt.Sprintf("outbound|%d||%s.dns", c.Port, c.ServiceName)
+}
+
+func (c DnsCluster) HostName() string {
+	return c.Domain
+}