qing
7d6ba6de93
- Add MsgConnectionRefusedException to distinguish ECONNREFUSED from other connection errors; openConnection() now throws it when connect() returns ECONNREFUSED. - MsgClient::call() adds retry_on_refused/retry_interval parameters (defaults false/1.0s), matching Python pymsg.MsgClient.call(retry_on_refused=True). - Retry loop: only retries on ECONNREFUSED; other exceptions (timeout, connection reset, business errors) propagate immediately. Throttled logging: first failure prints immediately, subsequent logs every 5 seconds. - DbC::call_msg() enables retry_on_refused=true (db is a hard dependency; gateway blocks waiting for db on startup instead of crashing). - LogC::_send() explicitly passes retry_on_refused=false (fail-safe; never block the background log thread when db is unavailable). - captcha/smtp auxiliary services keep default retry_on_refused=false (fail-fast; blocking in request threads would exhaust the thread pool). - Update README with pymsg protocol documentation, downstream retry strategy table, and v0.6.1 changelog entry.
47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
#pragma once
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#include <us/HttpClient.hpp>
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#include "Msg.hpp"
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#include <boost/json.hpp>
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namespace qing {
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namespace json = boost::json;
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class DbC {
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public:
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/* 本机 db 轻量查询的默认超时（秒）；慢操作由调用方显式放宽。
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* smtp/captcha 等其他下游的超时常量见 main.cpp。 */
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static constexpr double DEFAULT_TIMEOUT = 5.0;
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// 【保留】旧版 HTTP 接口：通过 HttpClient POST 到 dbv2 HTTP /execute 端点。
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// 保留用于兼容性参考，新代码优先使用 call_msg()（pymsg TCP 协议，更可靠）。
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static json::value call_http(json::value& params) {
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auto client = pmc::net::HttpClient();
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client.set_header("Content-Type: application/json");
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std::string payload = json::serialize(params);
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std::string res = "";
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client.post_stream_sync(_DBURL, payload, [&res](const auto& ret) {
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res += ret;
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});
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return json::parse(res);
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}
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// 新版 pymsg 接口：通过 MsgClient（TCP 长度前缀帧协议）调用 dbv2。
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// 自动添加 _route = "execute"，返回 dbv2 pymsg 完整 JSON 响应
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// {"success":..., "data":[...]}。
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// 响应格式与 call_http 兼容，调用方可直接替换。
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// db 是强依赖，启用 retry_on_refused：db 未启动时阻塞等待，避免启动顺序问题。
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static json::value call_msg(const json::value& params,
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double timeout = DEFAULT_TIMEOUT) {
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json::value jv_route = params;
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jv_route.as_object()["_route"] = "execute";
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pmc::net::MsgClient client("127.0.0.1", 8005, "gateway");
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std::string resp = client.call(
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json::serialize(jv_route), timeout,
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/*retry_on_refused=*/true);
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return json::parse(resp);
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}
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private:
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static constexpr const char* _DBURL = "http://127.0.0.1:8005/execute";
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};
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}
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