Maryk Memory Store

In-memory Maryk data store implementation. Fastest option for tests and local development. No persistence.

Getting started

InMemoryDataStore.open(
    keepAllVersions = true,
    keepUpdateHistoryIndex = true,
    dataModelsById = mapOf(
        1u to Account,
        2u to Course
    )
).use { store ->
    // Run operations on the store

    store.execute(
        Account.add(
            Account(
                username="test1",
                password="test1234"
            ),
            Account(
                username="test2",
                password="test1234"
            )
        )
    )
}

The .use { ... } scope closes the store automatically.

When to use

• Unit/integration tests.
• Local development.
• CI with deterministic behavior and zero external dependencies.

Limitations

• Data is lost on close/shutdown.
• Not suitable as persistent production storage.

Options

• keepAllVersions: Keep historic values/indexes/uniques for toVersion, changes, and history queries.
• keepUpdateHistoryIndex: Keep an engine-level update history index ordered by latest change. With this enabled, scanUpdates(order = null) uses newest-first change order by default.