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hostinfo.go
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hostinfo.go
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// The MIT License (MIT)
// Copyright (c) 2017-2020 Uber Technologies Inc.
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package membership
import (
"fmt"
"net"
"strconv"
"strings"
)
const (
PortTchannel = "tchannel"
PortGRPC = "grpc"
)
// PortMap is a map of port names to port numbers.
type PortMap map[string]uint16
// HostInfo is a type that contains the info about a cadence host
type HostInfo struct {
addr string // ip:port returned by peer provider
ip string // @todo should we set this to net.IP ?
identity string
portMap PortMap // ports host is listening to
}
// NewHostInfo creates a new HostInfo instance
func NewHostInfo(addr string) HostInfo {
ip, _, _ := net.SplitHostPort(addr)
return HostInfo{
addr: addr,
ip: ip,
}
}
// String formats a PortMap into a string of name:port pairs
func (m PortMap) String() string {
res := make([]string, 0, len(m))
for name, port := range m {
res = append(res, fmt.Sprintf("%s:%d", name, port))
}
return strings.Join(res, ", ")
}
// NewDetailedHostInfo creates a new HostInfo instance with identity and portmap information
func NewDetailedHostInfo(addr string, identity string, portMap PortMap) HostInfo {
ip, _, _ := net.SplitHostPort(addr)
return HostInfo{
addr: addr,
ip: ip,
identity: identity,
portMap: portMap,
}
}
// GetAddress returns the ip:port address
func (hi HostInfo) GetAddress() string {
return hi.addr
}
// GetNamedAddress returns the ip:port address
func (hi HostInfo) GetNamedAddress(port string) (string, error) {
if port, set := hi.portMap[port]; set {
return net.JoinHostPort(hi.ip, strconv.Itoa(int(port))), nil
}
return "", fmt.Errorf("port %q is not set for %+v", port, hi)
}
// Belongs tells if ip:port is assigned to this member
func (hi HostInfo) Belongs(address string) (bool, error) {
if hi.addr == address {
return true, nil
}
ip, port, err := net.SplitHostPort(address)
if err != nil {
return false, err
}
if ip != hi.ip {
return false, nil
}
for _, number := range hi.portMap {
if port == strconv.Itoa(int(number)) {
return true, nil
}
}
return false, nil
}
// Identity implements ringpop's Membership interface
func (hi HostInfo) Identity() string {
// if identity is not set, return address
if hi.identity == "" {
return hi.addr
}
return hi.identity
}
// Label is a noop function to conform to ringpop hashring member interface
func (hi HostInfo) Label(key string) (value string, has bool) {
return "", false
}
// SetLabel is a noop function to conform to ringpop hashring member interface
func (hi HostInfo) SetLabel(key string, value string) {
}
// String will return a human-readable host details
func (hi HostInfo) String() string {
return fmt.Sprintf("addr: %s, identity: %s, portMap: %s", hi.addr, hi.identity, hi.portMap)
}