react-native-app-monitor

Application monitoring tool

Installation

npm install react-native-app-monitor
# or
yarn add react-native-app-monitor

Local Development

If you're developing the library locally and linking it using file: protocol:

{
  "dependencies": {
    "react-native-app-monitor": "file:/path/to/react-native-app-monitor"
  }
}

Important: You need to configure Metro to ignore the library's node_modules to avoid processing React Native source files. Add this to your consuming app's metro.config.js:

const {getDefaultConfig, mergeConfig} = require('@react-native/metro-config');

const config = {
  resolver: {
    blockList: [
      /.*\/react-native-app-monitor\/node_modules\/react-native\/.*/,
    ],
  },
};

module.exports = mergeConfig(getDefaultConfig(__dirname), config);

Alternatively, you can use only the bundled code by ensuring the library is built (yarn prepare) and Metro will use lib/module/index.js instead of source files.

iOS Setup

Prerequisites: This library requires access to the private CocoaPods spec repository where AppMonitor ~> 1.0.0 is hosted.

Add the private spec repository to your Podfile:

source 'https://github.com/nammayatri/ny-cocoapods-specs.git'  # Private spec repo
source 'https://cdn.cocoapods.org/'  # CocoaPods master

Then run:

cd ios && pod install

Android Setup

Prerequisites: This library requires access to the private Maven repository where com.movingtech:appmonitor:1.0.2@aar is hosted.

Add the Maven repository to your app's build.gradle:

repositories {
    maven {
        url "YOUR_MAVEN_REPO_URL"  // Replace with your Maven repository URL
    }
    google()
    mavenCentral()
}

The Android SDK will be automatically resolved once the repository is configured.

Usage

import AppMonitor from 'react-native-app-monitor';

// Add a metric
AppMonitor.addMetric('response_time', 150.5);

// Add an event
AppMonitor.addEvent('user_action', 'button_click', {
  buttonId: 'submit',
  screen: 'home'
});

// Add a log
AppMonitor.addLog('info', 'User logged in', 'Auth', {
  userId: '123',
  timestamp: Date.now().toString()
});

// Get session ID
const sessionId = AppMonitor.getSessionId();

// Replace user ID (async)
await AppMonitor.replaceUserId('new-user-id');

// Reset user ID
AppMonitor.resetUserId();

// Generate new session
const newSessionId = AppMonitor.generateNewSession();

Troubleshooting

SyntaxError with React Native internal files

If you encounter errors like SyntaxError: ';' expected in React Native's internal files (e.g., VirtualView.js with match syntax), this is usually related to:

1. Node.js version compatibility:

   • This package requires Node.js >= 18.0.0
   • Node.js 22.x may have different module resolution behavior
   • Try using Node.js 18.x or 20.x LTS versions if you encounter issues

2. React Native version mismatch:

   • Ensure your app uses React Native 0.81.1 (or compatible version)
   • If you see node_modules/react-native-app-monitor/node_modules/react-native/, there's a version mismatch
   • Remove nested node_modules: rm -rf node_modules/react-native-app-monitor/node_modules

3. Clear caches and reinstall:

   # Clear Metro bundler cache
   npx react-native start --reset-cache
   
   # Clear watchman
   watchman watch-del-all
   
   # Remove nested React Native if it exists
   rm -rf node_modules/react-native-app-monitor/node_modules/react-native
   
   # Clear node_modules and reinstall
   rm -rf node_modules
   yarn install  # or npm install

4. Check Metro configuration:

   • Ensure your metro.config.js properly excludes React Native's internal files from transpilation
   • React Native files should be handled by React Native's own Babel preset
   • Add this to your metro.config.js if needed:

   resolver: {
     blockList: [
       /node_modules\/react-native-app-monitor\/node_modules\/react-native\/.*/,
     ],
   },

Contributing

• Development workflow
• Sending a pull request
• Code of conduct

License

MIT

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