97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
/*
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Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef MYSQLROUTER_REST_METADATA_CLIENT_INCLUDED
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#define MYSQLROUTER_REST_METADATA_CLIENT_INCLUDED
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#include <chrono>
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#include <functional>
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#include <string>
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#include <system_error>
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enum class FetchErrorc {
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request_failed = 1,
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not_ok,
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unexpected_content_type,
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content_empty,
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parse_error,
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not_ready_yet,
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authentication_required
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};
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namespace std {
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template <>
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struct is_error_code_enum<FetchErrorc> : true_type {};
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} // namespace std
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std::error_code make_error_code(FetchErrorc e);
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struct FetchErrorCategory : std::error_category {
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const char *name() const noexcept override;
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std::string message(int ev) const override;
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};
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class RestMetadataClient {
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private:
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std::string hostname_;
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unsigned port_;
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std::string username_;
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std::string password_;
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public:
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struct MetadataStatus {
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uint64_t refresh_failed;
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uint64_t refresh_succeeded;
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};
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RestMetadataClient(const std::string &hostname, unsigned port,
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const std::string &username = "",
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const std::string &password = "")
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: hostname_{hostname},
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port_{port},
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username_{username},
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password_{password} {}
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std::error_code fetch(MetadataStatus &status);
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std::error_code wait_for_cache_fetched(
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std::chrono::milliseconds timeout, MetadataStatus &status,
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std::function<bool(const MetadataStatus &)> pred);
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std::error_code wait_until_cache_fetched(
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std::chrono::steady_clock::time_point tp, MetadataStatus &status,
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std::function<bool(const MetadataStatus &)> pred);
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std::error_code wait_for_cache_ready(std::chrono::milliseconds timeout,
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MetadataStatus &status);
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std::error_code wait_for_cache_changed(std::chrono::milliseconds timeout,
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MetadataStatus &status);
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std::error_code wait_for_cache_updated(std::chrono::milliseconds timeout,
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MetadataStatus &status);
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};
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#endif
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