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86 lines
2.7 KiB
C++
86 lines
2.7 KiB
C++
//------------------------------------------------------------------------------
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/*
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This file is part of clio: https://github.com/XRPLF/clio
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Copyright (c) 2022, the clio developers.
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Permission to use, copy, modify, and distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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//==============================================================================
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#pragma once
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#include "util/config/Config.hpp"
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#include "util/log/Logger.hpp"
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#include <boost/asio.hpp>
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#include <boost/asio/io_context.hpp>
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#include <boost/asio/strand.hpp>
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#include <boost/json.hpp>
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#include <boost/json/object.hpp>
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#include <cstdint>
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#include <optional>
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#include <shared_mutex>
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#include <string>
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#include <unordered_map>
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namespace etl {
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class Source;
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} // namespace etl
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namespace etl::impl {
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/**
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* @brief Cache for rippled responses
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*/
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class ForwardCache {
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using ResponseType = std::optional<boost::json::object>;
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static constexpr std::uint32_t DEFAULT_DURATION = 10;
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util::Logger log_{"ETL"};
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mutable std::shared_mutex mtx_;
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std::unordered_map<std::string, ResponseType> latestForwarded_;
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boost::asio::strand<boost::asio::io_context::executor_type> strand_;
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etl::Source const& source_;
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std::uint32_t duration_ = DEFAULT_DURATION;
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void
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clear();
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public:
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ForwardCache(util::Config const& config, boost::asio::io_context& ioc, Source const& source)
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: strand_(boost::asio::make_strand(ioc)), source_(source)
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{
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if (config.contains("cache")) {
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auto commands = config.arrayOrThrow("cache", "Source cache must be array");
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if (config.contains("cache_duration"))
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duration_ = config.valueOrThrow<uint32_t>("cache_duration", "Source cache_duration must be a number");
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for (auto const& command : commands) {
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auto key = command.valueOrThrow<std::string>("Source forward command must be array of strings");
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latestForwarded_[key] = {};
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}
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}
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}
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void
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freshen();
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std::optional<boost::json::object>
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get(boost::json::object const& request) const;
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};
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} // namespace etl::impl
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