Crate migrate_state

Traits related to migration state storage.

They are separate from migrate-core crate to guarantee more stability, even when there are breaking changes to migrate-core crate. This is because it serves as an interface for the considerable part of migrate ecosystem, namely for different state storage and locks implementations. We would like to avoid updating all of them, especially if they don’t reside in our repository.

Traits

StateClient	Client for the migration state storage.
StateGuard	Object returned from StateLock::lock() that holds state storage lock while alive, preventing concurrent access to it from multiple threads and processes.
StateLock	Lock over a migration state storage.

Type Definitions

Result

Type alias for the std::result::Result type used in the traits