mirror of
https://github.com/scylladb/scylladb.git
synced 2026-05-01 05:35:48 +00:00
f3eade2f62
Drop the AGPL license in favor of a source-available license. See the blog post [1] for details. [1] https://www.scylladb.com/2024/12/18/why-were-moving-to-a-source-available-license/
41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
/*
|
|
* Copyright (C) 2021-present ScyllaDB
|
|
*/
|
|
|
|
/*
|
|
* SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
|
|
*/
|
|
#pragma once
|
|
|
|
#include <optional>
|
|
|
|
#include "timestamp.hh"
|
|
#include <seastar/core/sharded.hh>
|
|
|
|
class mutation;
|
|
|
|
namespace query {
|
|
|
|
class result;
|
|
class partition_slice;
|
|
|
|
} // namespace query
|
|
|
|
namespace service {
|
|
|
|
// An instance of this class is passed as an argument to storage_proxy::cas().
|
|
// The apply() method, which must be defined by the implementation. It can
|
|
// either return a mutation that will be used as a value for paxos 'propose'
|
|
// stage or it can return an empty option in which case an empty mutation will
|
|
// be used
|
|
class cas_request {
|
|
public:
|
|
virtual ~cas_request() = default;
|
|
// it is safe to dereference and use the qr foreign pointer, the result was
|
|
// created by a foreign shard but no longer used by it.
|
|
virtual std::optional<mutation> apply(seastar::foreign_ptr<seastar::lw_shared_ptr<query::result>> qr,
|
|
const query::partition_slice& slice, api::timestamp_type ts) = 0;
|
|
};
|
|
|
|
} // namespace service
|