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srvkeyspace.go
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/
srvkeyspace.go
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/*
Copyright 2019 The Vitess 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 topoproto
import (
"bytes"
"sort"
topodatapb "vitess.io/vitess/go/vt/proto/topodata"
)
// ShardReferenceArray is used for sorting ShardReference arrays
type ShardReferenceArray []*topodatapb.ShardReference
// Len implements sort.Interface
func (sra ShardReferenceArray) Len() int { return len(sra) }
// Len implements sort.Interface
func (sra ShardReferenceArray) Less(i, j int) bool {
if sra[i].KeyRange == nil || len(sra[i].KeyRange.Start) == 0 {
return true
}
if sra[j].KeyRange == nil || len(sra[j].KeyRange.Start) == 0 {
return false
}
return bytes.Compare(sra[i].KeyRange.Start, sra[j].KeyRange.Start) < 0
}
// Len implements sort.Interface
func (sra ShardReferenceArray) Swap(i, j int) {
sra[i], sra[j] = sra[j], sra[i]
}
// Sort will sort the list according to KeyRange.Start
func (sra ShardReferenceArray) Sort() { sort.Sort(sra) }
// SrvKeyspaceGetPartition returns a Partition for the given tablet type,
// or nil if it's not there.
func SrvKeyspaceGetPartition(sk *topodatapb.SrvKeyspace, tabletType topodatapb.TabletType) *topodatapb.SrvKeyspace_KeyspacePartition {
for _, p := range sk.Partitions {
if p.ServedType == tabletType {
return p
}
}
return nil
}