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inmemory.go
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/
inmemory.go
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/*
* Copyright 2019 SAP SE or an SAP affiliate company. All rights reserved. h file is licensed under the Apache Software License, v. 2 except as noted otherwise in the LICENSE file
*
* 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
*
*/
package provider
import (
"fmt"
"sync"
"github.com/gardener/external-dns-management/pkg/dns"
)
type zonedata struct {
zone DNSHostedZone
dnssets dns.DNSSets
}
type InMemory struct {
lock sync.Mutex
zones map[dns.ZoneID]zonedata
}
func NewInMemory() *InMemory {
return &InMemory{zones: map[dns.ZoneID]zonedata{}}
}
func (m *InMemory) GetZones() DNSHostedZones {
m.lock.Lock()
defer m.lock.Unlock()
zones := DNSHostedZones{}
for _, z := range m.zones {
zones = append(zones, z.zone)
}
return zones
}
func (m *InMemory) FindHostedZone(zoneid dns.ZoneID) DNSHostedZone {
m.lock.Lock()
defer m.lock.Unlock()
data, ok := m.zones[zoneid]
if !ok {
return nil
}
return data.zone
}
func (m *InMemory) CloneZoneState(zone DNSHostedZone) (DNSZoneState, error) {
m.lock.Lock()
defer m.lock.Unlock()
data, ok := m.zones[zone.Id()]
if !ok {
return nil, fmt.Errorf("DNSZone %s not hosted", zone.Id())
}
dnssets := data.dnssets.Clone()
return NewDNSZoneState(dnssets), nil
}
func (m *InMemory) SetZone(zone DNSHostedZone, zoneState DNSZoneState) {
clone := zoneState.GetDNSSets().Clone()
m.lock.Lock()
defer m.lock.Unlock()
m.zones[zone.Id()] = zonedata{zone: zone, dnssets: clone}
}
func (m *InMemory) DeleteZone(zoneID dns.ZoneID) {
m.lock.Lock()
defer m.lock.Unlock()
delete(m.zones, zoneID)
}
func (m *InMemory) AddZone(zone DNSHostedZone) bool {
m.lock.Lock()
defer m.lock.Unlock()
_, ok := m.zones[zone.Id()]
if ok {
return false
}
m.zones[zone.Id()] = zonedata{zone: zone, dnssets: dns.DNSSets{}}
return true
}
func (m *InMemory) Apply(zoneID dns.ZoneID, request *ChangeRequest, metrics Metrics) error {
m.lock.Lock()
defer m.lock.Unlock()
data, ok := m.zones[zoneID]
if !ok {
return fmt.Errorf("DNSZone %s not hosted", zoneID)
}
name, rset := buildRecordSet(request)
switch request.Action {
case R_CREATE, R_UPDATE:
data.dnssets.AddRecordSet(name, request.Addition.RoutingPolicy, rset)
metrics.AddZoneRequests(zoneID.ID, M_UPDATERECORDS, 1)
case R_DELETE:
data.dnssets.RemoveRecordSet(name, rset.Type)
metrics.AddZoneRequests(zoneID.ID, M_DELETERECORDS, 1)
}
return nil
}
func buildRecordSet(req *ChangeRequest) (dns.DNSSetName, *dns.RecordSet) {
var dnsset *dns.DNSSet
switch req.Action {
case R_CREATE, R_UPDATE:
dnsset = req.Addition
case R_DELETE:
dnsset = req.Deletion
}
return dnsset.Name, dnsset.Sets[req.Type]
}
type DumpDNSHostedZone struct {
ProviderType string
Key string
Id string
Domain string
ForwardedDomains []string
}
type ZoneDump struct {
HostedZone DumpDNSHostedZone
DNSSets dns.DNSSets
}
type FullDump struct {
InMemory map[dns.ZoneID]*ZoneDump
}
func (m *InMemory) BuildFullDump() *FullDump {
m.lock.Lock()
defer m.lock.Unlock()
all := FullDump{InMemory: map[dns.ZoneID]*ZoneDump{}}
for zoneId := range m.zones {
all.InMemory[zoneId] = m.buildZoneDump(zoneId)
}
return &all
}
func (m *InMemory) buildZoneDump(zoneId dns.ZoneID) *ZoneDump {
data, ok := m.zones[zoneId]
if !ok {
return nil
}
hostedZone := DumpDNSHostedZone{ProviderType: data.zone.Id().ProviderType, Id: data.zone.Id().ID, Domain: data.zone.Domain(),
Key: data.zone.Key(), ForwardedDomains: data.zone.ForwardedDomains()}
return &ZoneDump{HostedZone: hostedZone, DNSSets: data.dnssets}
}
/*
func (m *InMemory) ServeHTTP(w http.ResponseWriter, r *http.Request) {
fullDump := m.BuildFullDump()
js, err := json.Marshal(*fullDump)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json")
w.Write(js)
}
*/