📦 WiseJSON DB

WiseJSON DB is an incredibly fast, crash-proof, embedded JSON database for Node.js. It features a powerful sync engine, ACID transactions, and advanced indexing, making it a perfect choice for offline-first applications, desktop software, and robust backend services.

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🚀 Quick Start with Docker

The fastest way to get started is by running the WiseJSON server, which includes the Data Explorer web UI and the synchronization API, using Docker.

1. Run the official Docker image:

docker run -d -p 3000:3000 \
  -v wisejson_data:/data \
  --name wisejson-server \
  your_dockerhub_username/wisejson-server:latest

(Replace your_dockerhub_username with the actual Docker Hub repository name)

2. Open the Data Explorer: Your server is now running! Navigate to http://localhost:3000 in your browser.

Your database files are safely stored in a Docker volume named wisejson_data.

➡️ For detailed instructions on configuration, data persistence, and using Docker Compose, see our Comprehensive Docker Guide.

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💡 Key Features

• High Performance: In-memory indexing and optimized I/O for rapid data access.
• Crash-Proof & Durable:
  • WAL (Write-Ahead Logging): Guarantees data integrity and recovery after crashes.
  • Atomic Checkpoints: Periodic snapshots for fast restarts, with segmentation for large collections.
• ACID-Compliant Transactions: Ensures data consistency across multi-collection operations.
• Powerful Querying & Indexing: Supports unique and non-unique indexes and a rich query syntax ($gt, $in, $or, etc.) for complex lookups.
• Ready for Offline-First: A robust sync engine to seamlessly synchronize local client data with a central server.
• Tooling Included: Comes with a web-based Data Explorer and a versatile Command Line Interface (CLI).
• Multi-Process Safety: Uses file locking to prevent data corruption when accessed from multiple Node.js processes.
• Lightweight & Simple API: Minimal dependencies (uuid, proper-lockfile) and an intuitive, modern API.

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📥 Installation (As a Node.js Library)

To embed WiseJSON DB directly into your Node.js application, install the library from NPM:

npm install wise-json-db

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📚 Basic API Usage

The API is designed to be simple and intuitive, with "lazy" initialization.

const { connect } = require('wise-json-db');
const path = require('path');

// `connect` creates a database instance. Initialization happens automatically on the first operation.
const db = connect(path.resolve(__dirname, 'my-app-data'));

async function main() {
  // Getting a collection triggers the initialization if it hasn't happened yet.
  const users = await db.getCollection('users');
  
  await users.clear(); // Clean up for a predictable run

  // Create a unique index to prevent duplicate emails
  await users.createIndex('email', { unique: true });

  // Insert documents
  await users.insert({ name: 'Alice', email: 'alice@example.com', age: 30 });
  await users.insertMany([
    { name: 'Bob', email: 'bob@example.com', age: 24 },
    { name: 'Charlie', email: 'charlie@example.com', age: 35, tags: ['dev'] }
  ]);

  // Find a document using a rich query object
  const devUser = await users.findOne({ tags: 'dev', age: { $gt: 30 } });
  console.log('Developer over 30:', devUser);

  // Update a document using MongoDB-style operators
  const { modifiedCount } = await users.updateOne(
    { email: 'alice@example.com' },
    { $set: { status: 'active' }, $inc: { age: 1 } }
  );
  console.log(`Updated ${modifiedCount} document(s).`);
  
  // Close the database to ensure all data is flushed to disk before the app exits.
  await db.close();
  console.log('Database closed.');
}

main().catch(console.error);

For a deeper dive into the API, check out the documentation in the /docs directory.

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🛠️ Command Line Interface (CLI)

WiseJSON DB includes a powerful CLI for database administration.

# See all available commands
wise-json --help

# List all collections in the database
wise-json list-collections

# Show documents with filtering and sorting
wise-json show-collection users --limit 5 --sort age --order desc

# Create an index (requires the --allow-write flag for modifying operations)
wise-json create-index users email --unique --allow-write

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🤝 Contributing

Contributions are welcome! Whether it's bug reports, feature suggestions, or pull requests, your help is appreciated. Please feel free to open an issue to discuss your ideas.

📄 License

This project is licensed under the MIT License. See the LICENSE file for details.