forked from Dataman-Cloud/swan
/
raft_state.go
56 lines (44 loc) · 1.24 KB
/
raft_state.go
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package store
import (
"github.com/boltdb/bolt"
"github.com/coreos/etcd/raft/raftpb"
"github.com/gogo/protobuf/proto"
)
func withCreateRaftStateBucketIfNotExists(tx *bolt.Tx, fn func(bkt *bolt.Bucket) error) error {
bkt, err := createBucketIfNotExists(tx, bucketKeyStorageVersion, BucketKeyRaftState)
if err != nil {
return err
}
return fn(bkt)
}
func getRaftStateBucket(tx *bolt.Tx) *bolt.Bucket {
return getBucket(tx, bucketKeyStorageVersion, BucketKeyRaftState)
}
func putRaftState(tx *bolt.Tx, state raftpb.HardState) error {
return withCreateRaftStateBucketIfNotExists(tx, func(bkt *bolt.Bucket) error {
p, err := proto.Marshal(&state)
if err != nil {
return err
}
return bkt.Put(BucketKeyData, p)
})
}
func getRaftState(tx *bolt.Tx) (raftpb.HardState, error) {
bkt := getRaftStateBucket(tx)
if bkt == nil {
return raftpb.HardState{}, nil
}
var hardState raftpb.HardState
p := bkt.Get(BucketKeyData)
if err := proto.Unmarshal(p, &hardState); err != nil {
return hardState, err
}
return hardState, nil
}
func removeRaftState(tx *bolt.Tx) error {
storageVersionBkt := getBucket(tx, bucketKeyStorageVersion)
if storageVersionBkt == nil {
return nil
}
return storageVersionBkt.DeleteBucket(BucketKeyRaftState)
}