rocketmq-store 0.9.0

Storage layer for Apache RocketMQ in Rust.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

// Copyright 2023 The RocketMQ Rust Authors
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use crate::base::dispatch_request::DispatchRequest;

pub trait CommitLogDispatcher: Send + Sync + 'static {
    fn dispatch(&self, dispatch_request: &mut DispatchRequest);

    /// Dispatch a batch of requests. Default implementation calls dispatch for each request.
    /// Implementers can override this for batch optimizations.
    fn dispatch_batch(&self, dispatch_requests: &mut [DispatchRequest]) {
        for request in dispatch_requests.iter_mut() {
            self.dispatch(request);
        }
    }

    /// Returns the highest persisted CommitLog offset this dispatcher has already processed.
    ///
    /// The returned offset is used as a recovery/reput lower bound. `None` means the dispatcher
    /// has no persisted progress to contribute.
    fn dispatch_progress_offset(&self, _commit_log_min_offset: i64) -> Option<i64> {
        None
    }
}