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address.go
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address.go
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//
// Copyright (C) 2021 IOTech Ltd
//
// SPDX-License-Identifier: Apache-2.0
package models
import (
"encoding/json"
"github.com/edgexfoundry/go-mod-core-contracts/v2/common"
"github.com/edgexfoundry/go-mod-core-contracts/v2/errors"
)
type Address interface {
GetBaseAddress() BaseAddress
}
// instantiateAddress instantiate the interface to the corresponding address type
func instantiateAddress(i interface{}) (address Address, err error) {
a, err := json.Marshal(i)
if err != nil {
return address, errors.NewCommonEdgeX(errors.KindContractInvalid, "Failed to marshal address.", err)
}
return unmarshalAddress(a)
}
func unmarshalAddress(b []byte) (address Address, err error) {
var alias struct {
Type string
}
if err = json.Unmarshal(b, &alias); err != nil {
return address, errors.NewCommonEdgeX(errors.KindContractInvalid, "Failed to unmarshal address.", err)
}
switch alias.Type {
case common.REST:
var rest RESTAddress
if err = json.Unmarshal(b, &rest); err != nil {
return address, errors.NewCommonEdgeX(errors.KindContractInvalid, "Failed to unmarshal REST address.", err)
}
address = rest
case common.MQTT:
var mqtt MQTTPubAddress
if err = json.Unmarshal(b, &mqtt); err != nil {
return address, errors.NewCommonEdgeX(errors.KindContractInvalid, "Failed to unmarshal MQTT address.", err)
}
address = mqtt
case common.EMAIL:
var mail EmailAddress
if err = json.Unmarshal(b, &mail); err != nil {
return address, errors.NewCommonEdgeX(errors.KindContractInvalid, "Failed to unmarshal Email address.", err)
}
address = mail
default:
return address, errors.NewCommonEdgeX(errors.KindContractInvalid, "Unsupported address type", err)
}
return address, nil
}
// BaseAddress is a base struct contains the common fields, such as type, host, port, and so on.
type BaseAddress struct {
// Type is used to identify the Address type, i.e., REST or MQTT
Type string
// Common properties
Host string
Port int
}
// RESTAddress is a REST specific struct
type RESTAddress struct {
BaseAddress
Path string
HTTPMethod string
}
func (a RESTAddress) GetBaseAddress() BaseAddress { return a.BaseAddress }
// MQTTPubAddress is a MQTT specific struct
type MQTTPubAddress struct {
BaseAddress
Publisher string
Topic string
QoS int
KeepAlive int
Retained bool
AutoReconnect bool
ConnectTimeout int
}
func (a MQTTPubAddress) GetBaseAddress() BaseAddress { return a.BaseAddress }
// EmailAddress is an Email specific struct
type EmailAddress struct {
BaseAddress
Recipients []string
}
func (a EmailAddress) GetBaseAddress() BaseAddress { return a.BaseAddress }