# 分析方案
## 变更内容总结 1. **iOS后台任务系统重构** - 修复后台任务无法自动运行的问题 2. **日志系统优化** - 改进日志记录机制,添加队列和批量写入 3. **文档新增** - 添加后台任务修复总结和测试指南文档 4. **应用启动优化** - 添加后台任务状态检查和恢复逻辑 5. **版本号更新** - Info.plist版本从1.0.23升级到1.0.24 ## 提交信息类型判断 - **主要类型**: `fix` - 这是一个重要的bug修复,解决了iOS后台任务无法自动运行的核心问题 - **作用域**: `ios-background` - 专注于iOS后台任务功能 - **影响**: 这个修复对iOS用户的后台功能至关重要 ## 提交信息 fix(ios-background): 修复iOS后台任务无法自动运行的问题 主要修复内容: - 修复BackgroundTaskBridge任务调度逻辑,改用BGAppRefreshTaskRequest - 添加任务完成后自动重新调度机制,确保任务持续执行 - 优化应用生命周期管理,移除重复的后台任务调度 - 在应用启动时添加后台任务状态检查和恢复功能 - 将默认任务间隔从30分钟优化为15分钟 次要改进: - 重构日志系统,添加内存队列和批量写入机制,提升性能 - 添加写入锁和重试机制,防止日志数据丢失 - 新增详细的修复总结文档和测试指南 技术细节: - 使用BGAppRefreshTaskRequest替代BGProcessingTaskRequest - 实现任务过期自动重新调度 - 添加任务执行状态监控和恢复逻辑 - 优化错误处理和日志输出 影响范围: iOS后台任务调度、通知推送、应用状态管理
This commit is contained in:
388
utils/logger.ts
388
utils/logger.ts
@@ -8,10 +8,37 @@ interface LogEntry {
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data?: any;
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}
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/**
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* 改进的日志系统
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* 主要改进:
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* 1. 内存队列和批量写入机制 - 避免频繁存储操作
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* 2. 写入锁机制 - 防止并发写入导致数据丢失
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* 3. 改进的错误处理和重试机制
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* 4. 优化的 ID 生成 - 确保唯一性
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* 5. 写入确认机制 - 返回 Promise 让调用者知道日志是否成功保存
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*/
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class Logger {
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private static instance: Logger;
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private readonly maxLogs = 1000; // 最多保存1000条日志
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private readonly storageKey = '@app_logs';
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// 内存队列相关
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private memoryQueue: LogEntry[] = [];
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private readonly queueMaxSize = 50; // 达到50条日志时触发批量写入
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private readonly flushInterval = 5000; // 5秒自动刷新一次
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private flushTimer: ReturnType<typeof setInterval> | null = null;
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// 写入锁相关
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private isWriting = false;
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private writePromise: Promise<void> | null = null;
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// ID 生成相关
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private idCounter = 0;
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private lastTimestamp = 0;
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// 重试相关
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private readonly maxRetries = 3;
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private readonly retryDelay = 1000; // 1秒
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static getInstance(): Logger {
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if (!Logger.instance) {
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@@ -20,91 +47,289 @@ class Logger {
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return Logger.instance;
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}
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private async getLogs(): Promise<LogEntry[]> {
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constructor() {
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// 启动定时刷新机制
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this.startFlushTimer();
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// 应用退出时确保刷新日志
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if (typeof global !== 'undefined') {
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// 注册应用退出时的清理函数(如果可用)
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this.setupAppExitHandler();
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}
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}
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/**
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* 启动定时刷新机制
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*/
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private startFlushTimer(): void {
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if (this.flushTimer) {
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clearInterval(this.flushTimer);
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}
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this.flushTimer = setInterval(() => {
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if (this.memoryQueue.length > 0) {
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this.flushQueue().catch(error => {
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console.error('[Logger] Auto flush failed:', error);
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});
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}
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}, this.flushInterval);
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}
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/**
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* 设置应用退出处理
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*/
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private setupAppExitHandler(): void {
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// 这是一个最佳努力的清理,不是所有场景都能捕获
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if (typeof process !== 'undefined' && process.on) {
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const cleanup = () => {
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if (this.memoryQueue.length > 0) {
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// 同步刷新(应用退出时)
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this.flushQueueSync();
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}
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};
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process.on('exit', cleanup);
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process.on('SIGINT', cleanup);
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process.on('SIGTERM', cleanup);
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}
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}
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/**
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* 生成唯一 ID
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*/
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private generateId(): string {
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const now = Date.now();
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// 如果时间戳相同,增加计数器
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if (now === this.lastTimestamp) {
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this.idCounter++;
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} else {
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this.lastTimestamp = now;
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this.idCounter = 0;
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}
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// 格式:timestamp-counter-random
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const random = Math.random().toString(36).substr(2, 5);
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return `${now}-${this.idCounter}-${random}`;
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}
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/**
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* 从存储中获取日志(带重试)
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*/
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private async getLogs(retries = 0): Promise<LogEntry[]> {
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try {
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const logsJson = await AsyncStorage.getItem(this.storageKey);
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return logsJson ? JSON.parse(logsJson) : [];
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} catch (error) {
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console.error('Failed to get logs from storage:', error);
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if (retries < this.maxRetries) {
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console.warn(`[Logger] Failed to get logs, retrying (${retries + 1}/${this.maxRetries})...`);
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await this.delay(this.retryDelay);
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return this.getLogs(retries + 1);
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}
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console.error('[Logger] Failed to get logs after retries:', error);
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return [];
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}
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}
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private async saveLogs(logs: LogEntry[]): Promise<void> {
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/**
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* 保存日志到存储(带重试)
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*/
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private async saveLogs(logs: LogEntry[], retries = 0): Promise<void> {
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try {
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// 只保留最新的maxLogs条日志
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const trimmedLogs = logs.slice(-this.maxLogs);
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await AsyncStorage.setItem(this.storageKey, JSON.stringify(trimmedLogs));
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} catch (error) {
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console.error('Failed to save logs to storage:', error);
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if (retries < this.maxRetries) {
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console.warn(`[Logger] Failed to save logs, retrying (${retries + 1}/${this.maxRetries})...`);
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await this.delay(this.retryDelay);
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return this.saveLogs(logs, retries + 1);
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}
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console.error('[Logger] Failed to save logs after retries:', error);
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throw error;
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}
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}
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private async addLog(level: LogEntry['level'], message: string, data?: any): Promise<void> {
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// 安全地处理数据,避免循环引用
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let safeData = data;
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if (data && typeof data === 'object') {
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try {
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// 对于非 ERROR 级别的日志,也进行安全序列化
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if (data instanceof Error) {
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safeData = {
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name: data.name,
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message: data.message,
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stack: data.stack
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};
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} else {
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// 使用 JSON.stringify 的 replacer 函数处理循环引用
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safeData = JSON.parse(JSON.stringify(data, (key, value) => {
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if (typeof value === 'object' && value !== null) {
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if (value.constructor === Object || Array.isArray(value)) {
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return value;
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}
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// 对于其他对象类型,转换为字符串表示
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return value.toString ? value.toString() : '[Object]';
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}
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return value;
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}));
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}
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} catch (serializeError) {
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// 如果序列化失败,只保存基本信息
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safeData = {
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error: 'Failed to serialize data',
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type: typeof data,
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toString: data.toString ? data.toString() : 'N/A'
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};
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}
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/**
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* 延迟函数
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*/
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private delay(ms: number): Promise<void> {
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return new Promise(resolve => setTimeout(resolve, ms));
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}
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/**
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* 安全地序列化数据
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*/
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private serializeData(data: any): any {
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if (!data || typeof data !== 'object') {
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return data;
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}
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try {
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// 处理 Error 对象
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if (data instanceof Error) {
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return {
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name: data.name,
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message: data.message,
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stack: data.stack
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};
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}
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// 处理其他对象 - 使用 replacer 函数处理循环引用
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const seen = new WeakSet();
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return JSON.parse(JSON.stringify(data, (key, value) => {
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if (typeof value === 'object' && value !== null) {
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// 检测循环引用
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if (seen.has(value)) {
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return '[Circular Reference]';
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}
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seen.add(value);
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// 处理特殊对象类型
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if (value.constructor === Object || Array.isArray(value)) {
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return value;
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}
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// 对于其他对象类型,转换为字符串表示
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return value.toString ? value.toString() : '[Object]';
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}
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return value;
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}));
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} catch (serializeError) {
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// 如果序列化失败,返回基本信息
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return {
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error: 'Failed to serialize data',
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type: typeof data,
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toString: data.toString ? data.toString() : 'N/A'
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};
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}
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}
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/**
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* 刷新队列到存储(异步,带锁)
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*/
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private async flushQueue(): Promise<void> {
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// 如果正在写入,等待当前写入完成
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if (this.isWriting && this.writePromise) {
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await this.writePromise;
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return;
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}
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// 如果队列为空,直接返回
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if (this.memoryQueue.length === 0) {
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return;
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}
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// 设置写入锁
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this.isWriting = true;
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// 保存要写入的日志(避免在写入过程中队列被修改)
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const logsToWrite = [...this.memoryQueue];
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this.memoryQueue = [];
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this.writePromise = (async () => {
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try {
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// 获取现有日志
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const existingLogs = await this.getLogs();
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// 合并日志
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const allLogs = [...existingLogs, ...logsToWrite];
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// 保存到存储
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await this.saveLogs(allLogs);
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console.log(`[Logger] Successfully flushed ${logsToWrite.length} logs to storage`);
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} catch (error) {
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console.error('[Logger] Failed to flush queue:', error);
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// 写入失败,将日志放回队列(保留在内存中)
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this.memoryQueue.unshift(...logsToWrite);
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// 限制队列大小,避免内存溢出
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if (this.memoryQueue.length > this.maxLogs) {
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const overflow = this.memoryQueue.length - this.maxLogs;
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console.warn(`[Logger] Queue overflow, dropping ${overflow} oldest logs`);
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this.memoryQueue = this.memoryQueue.slice(-this.maxLogs);
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}
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} finally {
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// 释放写入锁
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this.isWriting = false;
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this.writePromise = null;
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}
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})();
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await this.writePromise;
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}
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/**
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* 同步刷新队列(应用退出时使用)
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*/
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private flushQueueSync(): void {
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if (this.memoryQueue.length === 0) {
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return;
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}
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try {
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// 注意:这是一个阻塞操作,仅在应用退出时使用
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const logsToWrite = [...this.memoryQueue];
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this.memoryQueue = [];
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// 这里我们无法使用异步操作,只能尝试
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console.log(`[Logger] Attempting to flush ${logsToWrite.length} logs synchronously`);
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// 实际上在 React Native 中很难做到真正的同步保存
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// 这里只是一个最佳努力的尝试
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this.flushQueue().catch(error => {
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console.error('[Logger] Sync flush failed:', error);
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});
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} catch (error) {
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console.error('[Logger] Failed to flush queue synchronously:', error);
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}
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}
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/**
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* 添加日志到队列
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*/
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private async addLog(level: LogEntry['level'], message: string, data?: any): Promise<void> {
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// 序列化数据
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const safeData = this.serializeData(data);
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// 创建日志条目
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const logEntry: LogEntry = {
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id: Date.now().toString() + Math.random().toString(36).substr(2, 9),
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id: this.generateId(),
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timestamp: Date.now(),
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level,
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message,
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data: safeData
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};
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// 同时在控制台输出 - 使用原生 console 方法避免循环调用
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// 输出到控制台
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try {
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const logMethod = level === 'ERROR' ? console.error :
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level === 'WARN' ? console.warn :
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level === 'INFO' ? console.info : console.log;
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logMethod(`[${level}] ${message}`, safeData);
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logMethod(`[${level}] ${message}`, safeData !== undefined ? safeData : '');
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} catch (consoleError) {
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// 如果控制台输出失败,使用最基本的 console.log
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console.log(`[${level}] ${message}`, typeof safeData === 'string' ? safeData : 'Object data');
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console.log(`[${level}] ${message}`);
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}
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try {
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const logs = await this.getLogs();
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logs.push(logEntry);
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await this.saveLogs(logs);
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} catch (error) {
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// 使用原生 console.error 避免循环调用
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console.error('Failed to add log:', error);
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// 添加到内存队列
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this.memoryQueue.push(logEntry);
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// 检查是否需要刷新队列
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if (this.memoryQueue.length >= this.queueMaxSize) {
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// 不等待刷新完成,避免阻塞调用者
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this.flushQueue().catch(error => {
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console.error('[Logger] Failed to flush queue after size threshold:', error);
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});
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}
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}
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/**
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* 公共日志方法
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*/
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async debug(message: string, data?: any): Promise<void> {
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await this.addLog('DEBUG', message, data);
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}
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@@ -118,37 +343,96 @@ class Logger {
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}
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async error(message: string, data?: any): Promise<void> {
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// addLog 方法已经包含了安全的数据处理逻辑
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await this.addLog('ERROR', message, data);
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}
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/**
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* 获取所有日志(包括内存队列中的)
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*/
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async getAllLogs(): Promise<LogEntry[]> {
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// 先刷新队列
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await this.flushQueue();
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// 然后获取存储中的日志
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return await this.getLogs();
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}
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/**
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* 清除所有日志
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*/
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async clearLogs(): Promise<void> {
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try {
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// 清空内存队列
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this.memoryQueue = [];
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// 清除存储
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await AsyncStorage.removeItem(this.storageKey);
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console.log('[Logger] All logs cleared successfully');
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} catch (error) {
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console.error('Failed to clear logs:', error);
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console.error('[Logger] Failed to clear logs:', error);
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throw error;
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}
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}
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/**
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* 导出日志
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*/
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async exportLogs(): Promise<string> {
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// 先刷新队列
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await this.flushQueue();
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// 然后获取并导出日志
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const logs = await this.getLogs();
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return JSON.stringify(logs, null, 2);
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}
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/**
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* 手动刷新日志到存储
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*/
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async flush(): Promise<void> {
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await this.flushQueue();
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}
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/**
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* 获取队列状态(用于调试)
|
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*/
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getQueueStatus(): { queueSize: number; isWriting: boolean } {
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return {
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queueSize: this.memoryQueue.length,
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isWriting: this.isWriting
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};
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}
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|
||||
/**
|
||||
* 清理资源
|
||||
*/
|
||||
destroy(): void {
|
||||
if (this.flushTimer) {
|
||||
clearInterval(this.flushTimer);
|
||||
this.flushTimer = null;
|
||||
}
|
||||
|
||||
// 最后刷新一次
|
||||
if (this.memoryQueue.length > 0) {
|
||||
this.flushQueueSync();
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 导出全局日志实例和便捷函数
|
||||
export const logger = Logger.getInstance();
|
||||
|
||||
// 便捷的全局日志函数
|
||||
// 便捷的全局日志函数(返回 Promise 以便调用者可以等待)
|
||||
export const log = {
|
||||
debug: (message: string, data?: any) => logger.debug(message, data),
|
||||
info: (message: string, data?: any) => logger.info(message, data),
|
||||
warn: (message: string, data?: any) => logger.warn(message, data),
|
||||
error: (message: string, data?: any) => logger.error(message, data),
|
||||
|
||||
// 额外的工具函数
|
||||
flush: () => logger.flush(),
|
||||
getQueueStatus: () => logger.getQueueStatus(),
|
||||
};
|
||||
|
||||
export type { LogEntry };
|
||||
export type { LogEntry };
|
||||
|
||||
Reference in New Issue
Block a user