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util.go
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util.go
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// Copyright 2020 MatrixOrigin.
//
// 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,
// See the License for the specific language governing permissions and
// limitations under the License.
package raftstore
import (
"github.com/matrixorigin/matrixcube/components/prophet/pb/metapb"
)
const (
invalidIndex = 0
)
// check whether checkEpoch is more recent than epoch. returns true means
// epoch < checkEpoch
func isEpochStale(epoch metapb.ResourceEpoch, checkEpoch metapb.ResourceEpoch) bool {
return epoch.Version < checkEpoch.Version ||
epoch.ConfVer < checkEpoch.ConfVer
}
func findReplica(shard Shard, storeID uint64) *Replica {
for idx := range shard.Replicas {
if shard.Replicas[idx].ContainerID == storeID {
return &shard.Replicas[idx]
}
}
return nil
}
func removeReplica(shard *Shard, storeID uint64) *Replica {
var removed *Replica
var newReplicas []Replica
for _, replica := range shard.Replicas {
if replica.ContainerID == storeID {
p := replica
removed = &p
} else {
newReplicas = append(newReplicas, replica)
}
}
shard.Replicas = newReplicas
return removed
}
func removedReplicas(new, old Shard) []uint64 {
var ids []uint64
for _, o := range old.Replicas {
c := 0
for _, n := range new.Replicas {
if n.ID == o.ID {
c++
break
}
}
if c == 0 {
ids = append(ids, o.ID)
}
}
return ids
}