drasi_core/evaluation/instant_query_clock.rs
1// Copyright 2024 The Drasi Authors.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15use crate::{interface::QueryClock, models::SourceChange};
16
17#[derive(Debug)]
18pub struct InstantQueryClock {
19 transaction_time: u64,
20 realtime: u64,
21}
22
23impl InstantQueryClock {
24 pub fn new(transaction_time: u64, realtime: u64) -> InstantQueryClock {
25 InstantQueryClock {
26 transaction_time,
27 realtime,
28 }
29 }
30
31 pub fn from_source_change(change: &SourceChange) -> InstantQueryClock {
32 InstantQueryClock {
33 transaction_time: change.get_transaction_time(),
34 realtime: change.get_realtime(),
35 }
36 }
37}
38
39impl QueryClock for InstantQueryClock {
40 fn get_transaction_time(&self) -> u64 {
41 self.transaction_time
42 }
43
44 fn get_realtime(&self) -> u64 {
45 self.realtime
46 }
47}