
This will allow us to pass e.g. a ResourceRecordChangeset, rather than a ResourceRecordChangeset, the parent ResourceRecordSets, and the grandparent Zone. Laying the groundwork for simplifying / optimizing the federation logic.
125 lines
4.0 KiB
Go
125 lines
4.0 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 clouddns
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import (
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"fmt"
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"k8s.io/kubernetes/federation/pkg/dnsprovider"
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"k8s.io/kubernetes/federation/pkg/dnsprovider/providers/google/clouddns/internal/interfaces"
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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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rrsets *ResourceRecordSets
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additions []dnsprovider.ResourceRecordSet
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removals []dnsprovider.ResourceRecordSet
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upserts []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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func (c *ResourceRecordChangeset) Upsert(rrset dnsprovider.ResourceRecordSet) dnsprovider.ResourceRecordChangeset {
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c.upserts = append(c.upserts, rrset)
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return c
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}
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func (c *ResourceRecordChangeset) Apply() error {
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rrsets := c.rrsets
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service := rrsets.zone.zones.interface_.service.Changes()
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var additions []interfaces.ResourceRecordSet
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for _, r := range c.additions {
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additions = append(additions, r.(ResourceRecordSet).impl)
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}
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var deletions []interfaces.ResourceRecordSet
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for _, r := range c.removals {
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deletions = append(deletions, r.(ResourceRecordSet).impl)
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}
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if len(c.upserts) != 0 {
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// TODO: We could maybe tweak this to fetch just the records we care about
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// although not clear when this would be a win. N=1 obviously so though...
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before, err := c.rrsets.List()
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if err != nil {
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return fmt.Errorf("error fetching recordset images for upsert operation: %v", err)
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}
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upsertMap := make(map[string]dnsprovider.ResourceRecordSet)
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for _, upsert := range c.upserts {
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key := string(upsert.Type()) + "::" + upsert.Name()
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upsertMap[key] = upsert
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}
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for _, b := range before {
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key := string(b.Type()) + "::" + b.Name()
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upsert := upsertMap[key]
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if upsert == nil {
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continue
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}
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deletions = append(deletions, b.(ResourceRecordSet).impl)
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additions = append(additions, upsert.(ResourceRecordSet).impl)
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// Mark as seen
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delete(upsertMap, key)
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}
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// Anything left in the map must be an addition
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for _, upsert := range upsertMap {
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additions = append(additions, upsert.(ResourceRecordSet).impl)
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}
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}
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change := service.NewChange(additions, deletions)
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newChange, err := service.Create(rrsets.project(), rrsets.zone.impl.Name(), change).Do()
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if err != nil {
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return err
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}
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newAdditions := newChange.Additions()
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if len(newAdditions) != len(additions) {
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return fmt.Errorf("Internal error when adding resource record set. Call succeeded but number of records returned is incorrect. Records sent=%d, records returned=%d, additions:%v", len(additions), len(newAdditions), c.additions)
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}
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newDeletions := newChange.Deletions()
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if len(newDeletions) != len(deletions) {
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return fmt.Errorf("Internal error when deleting resource record set. Call succeeded but number of records returned is incorrect. Records sent=%d, records returned=%d, deletions:%v", len(deletions), len(newDeletions), c.removals)
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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.additions) == 0 && len(c.removals) == 0
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}
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// ResourceRecordSets returns the parent ResourceRecordSets
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func (c *ResourceRecordChangeset) ResourceRecordSets() dnsprovider.ResourceRecordSets {
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return c.rrsets
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}
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