func applyPut(txnID int64, kv mvcc.KV, lessor lease.Lessor, req *etcdserverpb.PutRequest) (*etcdserverpb.PutResponse, error) {
resp := &etcdserverpb.PutResponse{}
resp.Header = &etcdserverpb.ResponseHeader{}
var (
rev int64
err error
)
if txnID != noTxn {
rev, err = kv.TxnPut(txnID, req.Key, req.Value, lease.LeaseID(req.Lease))
if err != nil {
return nil, err
}
} else {
leaseID := lease.LeaseID(req.Lease)
if leaseID != lease.NoLease {
if l := lessor.Lookup(leaseID); l == nil {
return nil, lease.ErrLeaseNotFound
}
}
rev = kv.Put(req.Key, req.Value, leaseID)
}
resp.Header.Revision = rev
return resp, nil
}
