Using MongoSwift in Mulithreaded Applications

Threadsafe Types

As of MongoSwift 0.2.0, the following types are safe to use across threads:

• MongoClient
• MongoDatabase
• MongoCollection

We make no guarantees about the safety of using any other type across threads.

Best Practices

Each MongoClient is backed by a pool of server connections. Any time a client or one of its child objects (a MongoDatabase or MongoCollection) makes a request to the database (a find, insertOne, etc.) a connection will be retrieved from the pool, used to execute the operation, and then returned to the pool when it is finished.

Each MongoClient uses its own background thread to monitor the MongoDB topology you are connected to.

In order to share the connection pool across threads and minimize the number of background monitoring threads, we recommend sharing MongoClients across threads.

Usage With Server-side Swift Frameworks

See the Examples/ directory in the driver GitHub repository for examples of how to integrate the driver in multithreaded frameworks.