Custom Extensions

It's extensible.

The key/value architecture of YapDatabase is just the foundation for an advanced plugin system. These plugins are called "extensions". YapDatabase ships with a number of helpful extensions. And, naturally, you can write your own.

Understanding Extensions

Extensions are integrated deep into the architecture:

• they have access to sqlite internals
• they can create their own dedicated sqlite tables
• they take part in transactions
• they implement hook methods which are called whenever items are inserted, modified, removed, etc

In order to implement your own custom extension, you'll be overriding 3 base classes:

• YapDatabaseExtension
• YapDatabaseExtensionConnection
• YapDatabaseExtensionTransaction

All the methods that you need to override are private / internal. So they are listed & documented in the implementation files (.m not .h).