452 lines
16 KiB
JavaScript
452 lines
16 KiB
JavaScript
const logs = require('../logProxy');
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const db = require('../dbProxy');
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const jobManager = require('../job/index');
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const ScheduleUtils = require('./utils');
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const ScheduleConfig = require('./config');
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const authorizationService = require('../../services/authorization_service');
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/**
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* 指令管理器
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* 负责管理任务下的多个指令，简化MQTT通信流程
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*/
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class CommandManager {
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constructor() {
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this.pendingCommands = new Map(); // 等待响应的指令 { command_id: { resolve, reject, timeout } }
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}
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/**
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* 执行指令序列
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* @param {number} task_id - 任务ID
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* @param {Array} commands - 指令数组
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* @param {object} mqttClient - MQTT客户端
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* @param {object} options - 执行选项（保留用于扩展）
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* @returns {Promise<object>} 执行结果
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*/
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async executeCommands(task_id, commands, mqttClient, options = {}) {
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if (!commands || commands.length === 0) {
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throw new Error('没有找到要执行的指令');
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}
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console.log(`[指令管理] 开始执行 ${commands.length} 个指令`);
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const results = [];
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const errors = [];
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// 顺序执行指令，失败时继续执行后续指令
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for (let i = 0; i < commands.length; i++) {
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const command = commands[i];
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try {
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console.log(`[指令管理] 执行指令 ${i + 1}/${commands.length}: ${command.command_name || command.name}`);
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const commandResult = await this.executeCommand(task_id, command, mqttClient);
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results.push(commandResult);
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} catch (error) {
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// 指令执行失败，记录错误但继续执行后续指令
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errors.push({
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command: command,
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error: error
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});
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console.error(`[指令管理] 指令执行失败: ${command.command_name || command.name}, 错误: ${error.message}`);
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// 失败时继续执行后续指令
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}
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}
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const successCount = results.length;
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const errorCount = errors.length;
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console.log(`[指令管理] 指令执行完成: 成功 ${successCount}/${commands.length}, 失败 ${errorCount}`);
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return {
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success: errorCount === 0, // 只有全部成功才算成功
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results: results,
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errors: errors,
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totalCommands: commands.length,
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successCount: successCount,
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errorCount: errorCount
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};
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}
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/**
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* 执行单个指令（统一封装）
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* 统一处理成功、失败、超时，统一记录数据库
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* @param {number} task_id - 任务ID
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* @param {object} command - 指令对象
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* @param {object} mqttClient - MQTT客户端
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* @returns {Promise<object>} 执行结果
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*/
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async executeCommand(task_id, command, mqttClient) {
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const start_time = new Date();
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let command_id = null;
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let command_record = null;
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try {
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// 1. 获取任务信息
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const task = await db.getModel('task_status').findByPk(task_id);
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if (!task) {
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throw new Error(`任务不存在: ${task_id}`);
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}
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// 1.5 检查账号授权状态
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const authCheck = await authorizationService.checkAuthorization(task.sn_code, 'sn_code');
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if (!authCheck.is_authorized) {
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throw new Error(`授权检查失败: ${authCheck.message}`);
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}
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// 2. 获取指令信息
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const command_name = command.command_name || command.name || '未知指令';
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const command_type = command.command_type || command.type;
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const command_params = command.command_params ?
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(typeof command.command_params === 'string' ? JSON.parse(command.command_params) : command.command_params) :
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{};
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if (!command_type) {
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throw new Error('指令类型不能为空');
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}
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// 3. 创建指令记录
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command_record = await db.getModel('task_commands').create({
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task_id: task_id,
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command_type: command_type,
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command_name: command_name,
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command_params: JSON.stringify(command_params),
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priority: command.priority || 1,
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sequence: command.sequence || 1,
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max_retries: command.maxRetries || command.max_retries || 3,
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status: 'pending'
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});
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command_id = command_record.id;
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console.log(`[指令管理] 创建指令记录: ${command_name} (ID: ${command_id})`);
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// 4. 更新指令状态为运行中
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await this._update_command_status(command_id, 'running', null, null, start_time);
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// 5. 执行指令（统一封装）
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const result = await this._execute_command_with_timeout(
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command_id,
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command_type,
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command_name,
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command_params,
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task.sn_code,
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mqttClient,
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start_time
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);
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// 6. 记录成功结果
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await this._record_command_result(command_id, 'completed', result, null, start_time);
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return {
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command_id: command_id,
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command_name: command_name,
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result: result,
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duration: new Date() - start_time,
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success: true
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};
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} catch (error) {
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// 统一处理错误（失败或超时）
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if (command_id) {
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await this._record_command_result(
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command_id,
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'failed',
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null,
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error,
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start_time
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);
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}
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// 重新抛出错误，让调用方知道执行失败
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throw error;
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}
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}
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/**
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* 执行指令（带超时保护）
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* @private
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*/
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async _execute_command_with_timeout(command_id, command_type, command_name, command_params, sn_code, mqttClient, start_time) {
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// 将驼峰命名转换为下划线命名
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const to_snake_case = (str) => {
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if (str.includes('_')) {
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return str;
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}
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return str.replace(/([A-Z])/g, '_$1').toLowerCase().replace(/^_/, '');
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};
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const method_name = to_snake_case(command_type);
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// 获取指令超时时间（从配置中获取，默认5分钟）
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const timeout = ScheduleConfig.taskTimeouts[command_type] ||
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ScheduleConfig.taskTimeouts[method_name] ||
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5 * 60 * 1000;
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// 构建指令执行 Promise
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const command_promise = (async () => {
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if (command_type && jobManager[method_name]) {
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return await jobManager[method_name](sn_code, mqttClient, command_params);
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} else if (jobManager[command_type]) {
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return await jobManager[command_type](sn_code, mqttClient, command_params);
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} else {
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throw new Error(`未知的指令类型: ${command_type} (尝试的方法名: ${method_name})`);
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}
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})();
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// 使用超时机制包装
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try {
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const result = await ScheduleUtils.withTimeout(
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command_promise,
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timeout,
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`指令执行超时: ${command_name} (超时时间: ${timeout / 1000}秒)`
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);
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return result;
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} catch (error) {
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// 判断是否为超时错误
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if (error.message && error.message.includes('超时')) {
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error.isTimeout = true;
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}
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throw error;
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}
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}
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/**
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* 记录指令执行结果（统一封装）
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* 处理成功、失败、超时等情况，统一记录到数据库
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* @private
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*/
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async _record_command_result(command_id, status, result, error, start_time) {
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const end_time = new Date();
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const duration = end_time.getTime() - start_time.getTime();
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let error_message = null;
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let error_stack = null;
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let result_data = null;
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// 处理错误信息
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if (error) {
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error_message = error.message || '指令执行失败';
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error_stack = error.stack || '';
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// 如果是超时错误，添加标识
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if (error.isTimeout) {
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error_message = `[超时] ${error_message}`;
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}
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}
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// 处理结果数据
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if (result && status === 'completed') {
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result_data = result;
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}
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// 更新数据库
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await this._update_command_status(
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command_id,
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status,
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result_data,
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error_message,
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start_time,
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end_time,
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duration,
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error_stack
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);
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// 记录日志
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if (status === 'completed') {
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console.log(`[指令管理] 指令执行成功: ${command_id} (耗时: ${duration}ms)`);
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} else if (status === 'failed') {
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const error_type = error && error.isTimeout ? '超时' : '失败';
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console.error(`[指令管理] 指令执行${error_type}: ${command_id}, 错误: ${error_message}`, {
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command_id: command_id,
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duration: duration,
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isTimeout: error && error.isTimeout
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});
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}
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}
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/**
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* 更新指令状态（统一封装）
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* @private
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*/
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async _update_command_status(command_id, status, result, error_message, start_time, end_time, duration, error_stack) {
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try {
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const update_data = {
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status: status,
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updated_at: new Date()
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};
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// 设置开始时间
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if (status === 'running' && start_time) {
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update_data.start_time = start_time;
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}
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// 设置结束时间和执行时长
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if ((status === 'completed' || status === 'failed') && end_time) {
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update_data.end_time = end_time;
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if (duration !== undefined) {
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update_data.duration = duration;
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}
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}
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// 处理执行结果
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if (result && status === 'completed') {
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const result_str = this._format_result_for_storage(result);
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update_data.result = result_str;
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update_data.progress = 100;
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}
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// 处理错误信息
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if (error_message) {
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update_data.error_message = this._truncate_string(error_message, 10000);
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}
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if (error_stack) {
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update_data.error_stack = this._truncate_string(error_stack, 50000);
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}
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// 更新数据库
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await db.getModel('task_commands').update(update_data, {
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where: { id: command_id }
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});
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} catch (db_error) {
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logs.error(`[指令管理] 更新指令状态失败:`, db_error, {
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command_id: command_id,
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status: status
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});
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// 如果是因为数据太长导致的错误，尝试只保存错误信息
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if (db_error.message && db_error.message.includes('Data too long')) {
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try {
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await db.getModel('task_commands').update({
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status: status,
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error_message: '结果数据过长，无法保存完整结果',
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end_time: end_time || new Date(),
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updated_at: new Date()
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}, {
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where: { id: command_id }
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});
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} catch (e) {
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console.error(`[指令管理] 保存截断结果也失败:`, e);
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}
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}
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}
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}
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/**
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* 格式化结果数据用于存储
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* @private
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*/
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_format_result_for_storage(result) {
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try {
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let result_str = JSON.stringify(result);
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const max_length = 60000; // 限制为60KB
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if (result_str.length > max_length) {
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// 如果结果太长，尝试压缩或截断
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if (typeof result === 'object' && result !== null) {
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const summary = {
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success: result.success !== undefined ? result.success : true,
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message: result.message || '执行成功',
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dataLength: result_str.length,
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truncated: true,
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preview: result_str.substring(0, 1000) // 保存前1000字符作为预览
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};
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result_str = JSON.stringify(summary);
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} else {
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result_str = result_str.substring(0, max_length) + '...[数据已截断]';
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}
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}
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return result_str;
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} catch (error) {
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return JSON.stringify({ error: '结果序列化失败', message: error.message });
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}
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}
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/**
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* 截断字符串
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* @private
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*/
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_truncate_string(str, max_length) {
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if (!str || str.length <= max_length) {
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return str;
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}
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return str.substring(0, max_length) + '...[已截断]';
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}
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/**
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* 更新指令状态（兼容旧接口，内部调用统一方法）
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* @param {number} command_id - 指令ID
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* @param {string} status - 状态
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* @param {object} result - 结果
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* @param {string} error_message - 错误信息
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* @deprecated 建议使用 _update_command_status 统一方法
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*/
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async updateCommandStatus(command_id, status, result = null, error_message = null) {
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const start_time = status === 'running' ? new Date() : null;
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const end_time = (status === 'completed' || status === 'failed') ? new Date() : null;
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// 计算执行时长
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let duration = null;
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if (end_time && start_time) {
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duration = end_time.getTime() - start_time.getTime();
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} else if (end_time) {
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// 如果没有开始时间，尝试从数据库获取
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try {
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const command = await db.getModel('task_commands').findByPk(command_id);
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if (command && command.start_time) {
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duration = end_time.getTime() - new Date(command.start_time).getTime();
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}
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} catch (e) {
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// 忽略错误
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}
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}
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await this._update_command_status(
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command_id,
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status,
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result,
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error_message,
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start_time,
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end_time,
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duration,
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null
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);
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}
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/**
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* 清理过期的指令记录
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* @param {number} days - 保留天数
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*/
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async cleanupExpiredCommands(days = 30) {
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try {
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const cutoffDate = new Date();
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cutoffDate.setDate(cutoffDate.getDate() - days);
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const deletedCount = await db.getModel('task_commands').destroy({
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where: {
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create_time: {
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[db.Sequelize.Op.lt]: cutoffDate
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}
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}
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});
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console.log(`[指令管理] 清理了 ${deletedCount} 条过期指令记录`);
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return deletedCount;
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} catch (error) {
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logs.error(`[指令管理] 清理过期指令失败:`, error);
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return 0;
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}
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}
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}
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module.exports = new CommandManager();
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