mongo_pool 1.3.0-dev.3

A MongoDB connection pool for Dart. Using this package, your application will open as many database connections as you specify as soon as it runs.

MongoDB Connection Pooling - Mongo Pool

How to migrate from 1.2.0 to 1.3.0

• To use MongoDb PoolService you need to create a new Mongo Pool Configuration object. You can use the following code snippet to create a Mongo Pool Configuration object.

final MongoDbPoolService poolService = MongoDbPoolService(
  const MongoPoolConfiguration(
    maxLifetimeMilliseconds: 1000,
    uriString: 'mongodb://localhost:27017/my_database',
    poolSize: 4,
  ),
);

• You can use the following code snippet to open the pool.

await openDbPool(poolService);

Future<void> openDbPool(MongoDbPoolService service) async {
  try {
    await service.open();
  } on Exception catch (e) {
    /// handle the exception here
    print(e);
  }
}

• You can use the following code snippet to get the instance of the pool.

final MongoDbPoolService poolService = MongoDbPoolService.getInstance();

Introduction

This package is a simple connection pooling for MongoDB. It is based on the mongo_dart package.

Features

• Connection pool size configuration
• Automatic connection pool expansion
• Instance where you can access the connection from the pool [NEW]

Getting started

Using this package, your application will open as many database connections as you specify as soon as it runs. You can open, close and change the number of these links at any time.

Usage

With mongodb package, you can use the MongoDbPoolService class to create a pool of connections.

First, you need to create a MongoDbPoolService instance. You can do this by passing the number of connections you want Next, you need to open the pool. You can do this by calling the open() method. If you want to close the pool, you can call the close() method. MongoDbPoolService class has a getInstance() method. You can use this method to get the instance of the pool. You can use this instance to access the pool from anywhere in the project.

A simple usage example:

import 'package:mongo_pool/mongo_pool.dart';

Future<void> main() async {
  /// Create a pool of 5 connections
  final MongoDbPoolService poolService = MongoDbPoolService(
    const MongoPoolConfiguration(
      maxLifetimeMilliseconds: 1000,
      uriString: 'mongodb://localhost:27017/my_database',
      poolSize: 4,
    ),
  );

  /// Open the pool
  await openDbPool(poolService);

  /// Get a connection from pool
  final Db connection = await poolService.acquire();

  // Database operations
  final DbCollection collection = connection.collection('my_collection');
  final List<Map<String, dynamic>> result = await collection.find().toList();
  result;
  // Connection release for other operations
  unawaited(poolService.release(connection));

  // Pool close
  await poolService.close();
}

Future<void> openDbPool(MongoDbPoolService service) async {
  try {
    await service.open();
  } on Exception catch (e) {
    /// handle the exception here
    print(e);
  }
}

class OtherClass {
  OtherClass();

  Future<void> openDbPool() async {
    /// Get the instance of the pool
    final MongoDbPoolService poolService = MongoDbPoolService.getInstance();
    final Db connection = await poolService.acquire();
    // Database operations
    final DbCollection collection = connection.collection('my_collection');
    final List<Map<String, dynamic>> result = await collection.find().toList();
    result;
    // Connection release for other operations
    poolService.release(connection);
    // Pool close
    await poolService.close();
  }
}

Testing

To run the tests, you need to have a MongoDB instance running on your machine. You can use the following command to start a MongoDB instance using Docker:

docker run -d -p 27017:27017 --name mongo mongo

Problems Solved

• ✅ Mongodb srv connection problem solved
• ✅ Fixed a bug that prevented a new connection from being created when no connection remained
• ✅ Unable to connect to MongoDB using SSL/TLS fixed

Get package for using in your project

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Additional information

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