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Contents
/* -*- Mode: C++; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
* Copyright 2020-2021 Couchbase, Inc.
*
* 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.
*/
#pragma once
#include <map>
#include <mutex>
#include <optional>
#include <string>
namespace couchbase::core
{
class query_cache
{
public:
struct entry {
std::string name;
std::optional<std::string> plan{};
};
void erase(const std::string& statement)
{
std::scoped_lock lock(store_mutex_);
auto it = store_.find(statement);
if (it == store_.end()) {
return;
}
store_.erase(it);
}
void put(const std::string& statement, const std::string& prepared)
{
std::scoped_lock lock(store_mutex_);
store_.try_emplace(statement, entry{ prepared });
}
void put(const std::string& statement, const std::string& name, const std::string& encoded_plan)
{
std::scoped_lock lock(store_mutex_);
store_.try_emplace(statement, entry{ name, encoded_plan });
}
std::optional<entry> get(const std::string& statement)
{
std::scoped_lock lock(store_mutex_);
auto it = store_.find(statement);
if (it == store_.end()) {
return {};
}
return it->second;
}
private:
std::map<std::string, entry> store_;
std::mutex store_mutex_{};
};
} // namespace couchbase::core
Version data entries
8 entries across 8 versions & 1 rubygems