frostfs-node/pkg/services/policer/nodecache.go

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package policer
import "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
type nodeProcessStatus int8
const (
nodeNotProcessed nodeProcessStatus = iota
nodeDoesNotHoldObject
nodeHoldsObject
)
func (st nodeProcessStatus) Processed() bool {
return st != nodeNotProcessed
}
// nodeCache tracks Policer's check progress.
type nodeCache map[uint64]bool
func newNodeCache() nodeCache {
return make(map[uint64]bool)
}
func (n nodeCache) set(node netmap.NodeInfo, val bool) {
n[node.Hash()] = val
}
// submits storage node as a candidate to store the object replica in case of
// shortage.
func (n nodeCache) submitReplicaCandidate(node netmap.NodeInfo) {
n.set(node, false)
}
// submits storage node as a current object replica holder.
func (n nodeCache) submitReplicaHolder(node netmap.NodeInfo) {
n.set(node, true)
}
// processStatus returns current processing status of the storage node.
func (n nodeCache) processStatus(node netmap.NodeInfo) nodeProcessStatus {
switch val, ok := n[node.Hash()]; {
case !ok:
return nodeNotProcessed
case val:
return nodeHoldsObject
default:
return nodeDoesNotHoldObject
}
}
// SubmitSuccessfulReplication marks given storage node as a current object
// replica holder.
//
// SubmitSuccessfulReplication implements replicator.TaskResult.
func (n nodeCache) SubmitSuccessfulReplication(node netmap.NodeInfo) {
n.submitReplicaHolder(node)
}