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107 lines
3.6 KiB
Plaintext
107 lines
3.6 KiB
Plaintext
# base-log-factory
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[](https://www.npmjs.com/package/base-log-factory)
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[](https://npmjs.org/package/base-log-factory)
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[](https://npmjs.org/package/base-log-factory)
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[](LICENSE)
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[](https://www.typescriptlang.org/)
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> 🚀 A flexible and simple JS logging library that allows logging or collecting logs in different environments by configuring various Appenders. Suitable for browser, NodeJS and other environments.
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---
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## 🌟 Core Features
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- **Multi-level logging**
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Supports `TRACE/DEBUG/INFO/WARN/ERROR/FATAL/OFF` with precise control over log granularity.
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- **Flexible Appender Configuration**
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Built-in `ConsoleAppender`, `FileAppender` (size-based rolling), `DateFileAppender` (date-based rolling), and custom Appender extensions.
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- **Rich Formatting Options**
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Provides `BasicLayout` and `PatternLayout` (similar to Log4j) with customizable placeholders.
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- **Context Management**
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Supports Mapped Diagnostic Context (MDC) for attaching request IDs, user information, etc.
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---
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## 📅 Documentation
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For detailed usage instructions and API references, please visit the official documentation:
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👉 [View Full Documentation](https://fengxinming.github.io/base-log-factory/)
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---
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## 🚀 Quick Start
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### 1. Installation
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```bash
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npm install base-log-factory
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```
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### 2. Basic Usage
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```typescript
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// factory.ts
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import { LogFactory, ConsoleAppender } from 'base-log-factory';
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export default new LogFactory({
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appenders: [new ConsoleAppender()]
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});
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// main.ts
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import logFactory from './factory';
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const logger = logFactory.getLogger('app');
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logger.info('Server started successfully');
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```
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---
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## 🛠 Core Concepts
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### 1. Log Levels (with color coding)
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| Level | Value | Description | Recommended Use Cases |
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|---------|-------|---------------------------|-------------------------------------|
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| **TRACE** | 6 | Detailed tracking logs | Debugging code flow |
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| **DEBUG** | 5 | Debugging information | Development-stage debugging |
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| **INFO** | 4 | Operational information | Key business process milestones |
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| **WARN** | 3 | Non-critical issues | Resource warnings (e.g., low memory)|
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| **ERROR** | 2 | Error events | Failed operations |
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| **FATAL** | 1 | Critical system failures | System crashes |
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| OFF | 0 | Disable all logging | Disable logging |
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### 2. Appender Comparison
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| Type | Features | Use Cases |
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|--------------------|-----------------------------------|---------------------------|
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| `ConsoleAppender` | Realtime console output | Development debugging |
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| `FileAppender` | Size-based rolling (e.g., app.log.1)| Production logging |
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| `DateFileAppender` | Date-based rolling (e.g., app.2023-08-01.log)| Daily log archiving |
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---
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## 📝 Contribution Guide
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1. **Development Setup**
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```bash
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npm install
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```
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2. **Testing**
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```bash
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npm test # Run unit tests
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```
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3. **Before Submitting PRs**
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- Ensure ESLint is configured (VSCode plugin recommended)
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- Add test cases for new features
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- Update documentation
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---
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## 📄 License
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[MIT License](../../LICENSE)
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