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5d740dce6a
When batching changes, it is often handy to know whether a changeset IsEmpty, and thus does not need to be Apply-ed.
106 lines
2.8 KiB
Go
106 lines
2.8 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package route53
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import (
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/route53"
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"k8s.io/kubernetes/federation/pkg/dnsprovider"
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)
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// Compile time check for interface adherence
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var _ dnsprovider.ResourceRecordChangeset = &ResourceRecordChangeset{}
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type ResourceRecordChangeset struct {
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zone *Zone
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rrsets *ResourceRecordSets
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additions []dnsprovider.ResourceRecordSet
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removals []dnsprovider.ResourceRecordSet
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}
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func (c *ResourceRecordChangeset) Add(rrset dnsprovider.ResourceRecordSet) dnsprovider.ResourceRecordChangeset {
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c.additions = append(c.additions, rrset)
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return c
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}
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func (c *ResourceRecordChangeset) Remove(rrset dnsprovider.ResourceRecordSet) dnsprovider.ResourceRecordChangeset {
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c.removals = append(c.removals, rrset)
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return c
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}
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// buildChange converts a dnsprovider.ResourceRecordSet to a route53.Change request
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func buildChange(action string, rrs dnsprovider.ResourceRecordSet) *route53.Change {
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change := &route53.Change{
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Action: aws.String(action),
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ResourceRecordSet: &route53.ResourceRecordSet{
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Name: aws.String(rrs.Name()),
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Type: aws.String(string(rrs.Type())),
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TTL: aws.Int64(rrs.Ttl()),
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},
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}
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for _, rrdata := range rrs.Rrdatas() {
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rr := &route53.ResourceRecord{
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Value: aws.String(rrdata),
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}
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change.ResourceRecordSet.ResourceRecords = append(change.ResourceRecordSet.ResourceRecords, rr)
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}
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return change
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}
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func (c *ResourceRecordChangeset) Apply() error {
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hostedZoneID := c.zone.impl.Id
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var changes []*route53.Change
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for _, removal := range c.removals {
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change := buildChange(route53.ChangeActionDelete, removal)
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changes = append(changes, change)
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}
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for _, addition := range c.additions {
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change := buildChange(route53.ChangeActionCreate, addition)
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changes = append(changes, change)
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}
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if len(changes) == 0 {
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return nil
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}
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service := c.zone.zones.interface_.service
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request := &route53.ChangeResourceRecordSetsInput{
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ChangeBatch: &route53.ChangeBatch{
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Changes: changes,
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},
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HostedZoneId: hostedZoneID,
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}
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_, err := service.ChangeResourceRecordSets(request)
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if err != nil {
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// Cast err to awserr.Error to get the Code and
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// Message from an error.
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return err
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}
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return nil
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}
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func (c *ResourceRecordChangeset) IsEmpty() bool {
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return len(c.removals) == 0 && len(c.additions) == 0
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}
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