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// Copyright 2022 The OpenZipkin Authors
//
// 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 model
import (
"encoding/json"
"net"
"strings"
)
// Endpoint holds the network context of a node in the service graph.
type Endpoint struct {
ServiceName string
IPv4 net.IP
IPv6 net.IP
Port uint16
}
// MarshalJSON exports our Endpoint into the correct format for the Zipkin V2 API.
func (e Endpoint) MarshalJSON() ([]byte, error) {
return json.Marshal(&struct {
ServiceName string `json:"serviceName,omitempty"`
IPv4 net.IP `json:"ipv4,omitempty"`
IPv6 net.IP `json:"ipv6,omitempty"`
Port uint16 `json:"port,omitempty"`
}{
strings.ToLower(e.ServiceName),
e.IPv4,
e.IPv6,
e.Port,
})
}
// Empty returns if all Endpoint properties are empty / unspecified.
func (e *Endpoint) Empty() bool {
return e == nil ||
(e.ServiceName == "" && e.Port == 0 && len(e.IPv4) == 0 && len(e.IPv6) == 0)
}
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