feat(liblogc): 统一集中式日志客户端库 + 全量迁移
新增: - liblogc/: C++ 统一日志库 (libus_logc.so)，支持 set_endpoint/set_service_name/set_level - pymsg/pymsg/logc.py: Python 统一日志模块，基于 AsyncRpcQueue C++ 迁移 (删除 6 份本地 LogC.hpp 副本): - ca, gateway: <us/LogC.hpp> + set_service_name - captcha2, confs2, smtp3: using qing::LogC + set_service_name - core: ConfsLogC → qing::LogC (ConfsTask.cpp) - 所有 Makefile 添加 -lus_logc Python 迁移 (6 个 log_client.py → 4 行薄包装): - smtp, redirect80, confs, captcha, dnfs, static - 全部委托到 pymsg.logc.LogClient Go (waf): 保持现状，自成体系
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#pragma once
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/** LogC — gateway 统一日志客户端（C++ 版，对应各 Python 服务的 log_client.py）
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*
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* 设计要点（与 Python 版对齐）：
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* - 通过 pymsg TCP 调用 dbv2 execute 路由，逐条 INSERT 到 Logs 表
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* - 异步非阻塞：基于 pmc::net::AsyncQueue 内存队列 + 后台线程批量推送，不拖慢业务
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* - fail-safe：db 服务不可用时静默丢弃（仅 stderr 提示），绝不影响业务
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* - 缓冲批量：队列满 50 条或超时 2 秒时自动 flush
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* - 背压保护：队列上限 10000 条，满时丢最旧日志，防止内存无限增长
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*
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* 用法：
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* #include "LogC.hpp"
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*
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* qing::LogC::instance().info("gateway", "启动完成");
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* qing::LogC::instance().error("gateway", "数据库连接失败",
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* std::nullopt, R"({"errno":2002})");
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*
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* // 进程退出前：
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* qing::LogC::instance().shutdown(); // 停止后台线程并 flush 剩余日志（幂等）
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*
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* // 设置日志级别（main 启动时调用，低于此级别的日志直接丢弃）
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* qing::LogC::instance().set_level("warn"); // 只输出 warn/error
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*/
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#include <atomic>
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#include <chrono>
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#include <cstdio>
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#include <ctime>
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#include <mutex>
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#include <optional>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include <boost/json.hpp>
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#include <us/AsyncQueue.hpp>
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#include <us/Msg.hpp>
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namespace qing {
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namespace json = boost::json;
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class LogC {
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public:
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struct Entry {
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std::string service;
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std::string level;
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std::string message;
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std::optional<std::string> trace_id;
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std::optional<std::string> extra; // 已序列化的 JSON 字符串（存 Logs.extra TEXT）
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};
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static LogC& instance() {
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static LogC inst;
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return inst;
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}
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// ---- 公开接口 --------------------------------------------------------
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// 日志级别 → 数值（大写兼容）
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static const std::unordered_map<std::string, int>& level_order() {
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static const std::unordered_map<std::string, int> k = {
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{"debug", 0}, {"info", 1}, {"warn", 2}, {"warning", 2},
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{"error", 3}, {"critical", 3},
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{"DEBUG", 0}, {"INFO", 1}, {"WARN", 2}, {"WARNING", 2},
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{"ERROR", 3}, {"CRITICAL", 3},
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};
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return k;
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}
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// 设置日志级别阈值（debug|info|warn|error，大小写不限）
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// 低于此级别的日志在 push 时直接丢弃
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void set_level(const std::string& level) {
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auto it = level_order().find(level);
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if (it != level_order().end()) {
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_level_threshold.store(it->second, std::memory_order_relaxed);
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}
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}
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// 推送一条日志（非阻塞，立即返回）
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void push(const std::string& service, const std::string& level,
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const std::string& message,
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std::optional<std::string> trace_id = std::nullopt,
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std::optional<std::string> extra = std::nullopt) {
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// 日志级别过滤：低于阈值直接丢弃
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auto it = level_order().find(level);
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int lvl = (it != level_order().end()) ? it->second : 1;
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if (lvl < _level_threshold.load(std::memory_order_relaxed)) return;
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_queue.push(Entry{service, level, message,
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std::move(trace_id), std::move(extra)});
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}
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void debug(const std::string& service, const std::string& message,
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std::optional<std::string> trace_id = std::nullopt,
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std::optional<std::string> extra = std::nullopt) {
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push(service, "DEBUG", message, std::move(trace_id), std::move(extra));
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}
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void info(const std::string& service, const std::string& message,
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std::optional<std::string> trace_id = std::nullopt,
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std::optional<std::string> extra = std::nullopt) {
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push(service, "INFO", message, std::move(trace_id), std::move(extra));
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}
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void warning(const std::string& service, const std::string& message,
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std::optional<std::string> trace_id = std::nullopt,
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std::optional<std::string> extra = std::nullopt) {
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push(service, "WARNING", message, std::move(trace_id), std::move(extra));
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}
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void error(const std::string& service, const std::string& message,
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std::optional<std::string> trace_id = std::nullopt,
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std::optional<std::string> extra = std::nullopt) {
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push(service, "ERROR", message, std::move(trace_id), std::move(extra));
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}
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void critical(const std::string& service, const std::string& message,
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std::optional<std::string> trace_id = std::nullopt,
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std::optional<std::string> extra = std::nullopt) {
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push(service, "CRITICAL", message, std::move(trace_id), std::move(extra));
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}
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// 手动 flush：通知后台线程立即发送当前积攒的批次，并等待其完成
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void flush() {
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_queue.flush();
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}
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// 停止后台线程并 flush 剩余日志（进程退出前调用，幂等）
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void shutdown() {
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_queue.shutdown();
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}
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// ---- 配置（构造后、首次推送前可改）------------------------------------
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void set_endpoint(const std::string& addr, int port) {
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std::lock_guard<std::mutex> lock(_endpoint_mtx);
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_db_addr = addr;
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_db_port = port;
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}
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private:
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LogC()
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: _queue(
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[this](std::vector<Entry>&& batch) { this->_send_batch(std::move(batch)); },
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{_BATCH_SIZE, _FLUSH_INTERVAL, _MAX_QUEUE_SIZE, 0.5},
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[](const std::exception& e, std::vector<Entry>&&) {
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std::cerr << "[LogC] 发送失败: " << e.what() << std::endl;
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})
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{
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_queue.start();
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}
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~LogC() { shutdown(); }
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LogC(const LogC&) = delete;
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LogC& operator=(const LogC&) = delete;
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// 通过 pymsg 使用 execute 路由逐条 INSERT 到 dbv2 Logs 表
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void _send_batch(const std::vector<Entry>& batch) {
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std::string addr;
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int port;
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{
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std::lock_guard<std::mutex> lock(_endpoint_mtx);
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addr = _db_addr;
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port = _db_port;
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}
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const std::string now = _utc_now_iso(); // 批次共享同一时间戳（对齐 Python 版）
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try {
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pmc::net::MsgClient client(addr, port, "gateway-log");
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for (const auto& e : batch) {
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json::object values;
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values["ts"] = now;
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values["service"] = e.service;
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values["level"] = e.level;
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values["message"] = e.message;
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values["trace_id"] = e.trace_id ? json::value(*e.trace_id)
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: json::value(nullptr);
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values["extra"] = e.extra ? json::value(*e.extra)
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: json::value(nullptr);
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json::object payload;
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payload["_route"] = "execute";
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payload["action"] = "insert";
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payload["table"] = "Logs";
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payload["values"] = std::move(values);
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const std::string resp = client.call(
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json::serialize(payload), _TIMEOUT,
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/*retry_on_refused=*/false); // 日志是 fail-safe，db 不可用时静默丢弃，绝不阻塞重试
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auto obj = json::parse(resp).as_object();
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if (!obj.at("success").as_bool()) {
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std::string err = "unknown";
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if (auto* ev = obj.if_contains("error")) {
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if (ev->is_string()) err = ev->as_string().c_str();
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}
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std::cerr << "[LogC] INSERT 失败: " << err << std::endl;
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}
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}
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} catch (const std::exception& e) {
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// fail-safe：db 不可用时静默丢弃，绝不影响业务
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std::cerr << "[LogC] 发送失败: " << e.what() << std::endl;
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}
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}
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// UTC ISO8601 时间戳（对齐 Python datetime.now(timezone.utc).isoformat()）
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// 形如 2026-07-29T08:30:00.123456+00:00，字典序即时间序，便于 db 按 ts 清理
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static std::string _utc_now_iso() {
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const auto now = std::chrono::system_clock::now();
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const auto t = std::chrono::system_clock::to_time_t(now);
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const auto us = std::chrono::duration_cast<std::chrono::microseconds>(
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now.time_since_epoch()).count() % 1000000;
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std::tm tm{};
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::gmtime_r(&t, &tm);
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char buf[40];
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std::snprintf(buf, sizeof buf,
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"%04d-%02d-%02dT%02d:%02d:%02d.%06d+00:00",
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tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
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tm.tm_hour, tm.tm_min, tm.tm_sec, static_cast<int>(us));
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return buf;
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}
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// ---- 配置项 -----------------------------------------------------------
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std::string _db_addr = "127.0.0.1";
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int _db_port = 8005;
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std::mutex _endpoint_mtx; // 保护 _db_addr/_db_port 读写（set_endpoint 与后台线程并发）
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std::atomic<int> _level_threshold{1}; // 日志级别阈值，默认 INFO(1)
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static constexpr size_t _BATCH_SIZE = 50; // 队列满 50 条时 flush
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static constexpr double _FLUSH_INTERVAL = 2.0; // 超时 2 秒强制 flush
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static constexpr size_t _MAX_QUEUE_SIZE = 10000; // 队列上限，满时丢最旧
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static constexpr double _TIMEOUT = 5.0; // socket 超时（秒）
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// ---- 核心队列 ---------------------------------------------------------
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pmc::net::AsyncQueue<Entry> _queue;
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};
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} // namespace qing
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