Trait NamespaceCursor 

pub trait NamespaceCursor: PageCursor {
    // Required methods
    fn namespace_id(&self) -> &NamespaceId;
    fn last_key(&self) -> Option<&str>;
    fn key_prefix(&self) -> String;
}

A cursor that resumes an enumeration of one namespace’s own keyspace.

Maintenance passes walk keys rather than rows, and their cursors are enumeration shortcuts and nothing else: a pass re-reads whatever authorizes the work it does, whatever position it resumed from, so a cursor that is lost or refused costs a repeated walk and never a wrong decision. What the binding buys is that a token minted for another namespace, another job, or another key family is refused instead of quietly skipping the keys between here and wherever it points.

Required Methods

fn namespace_id(&self) -> &NamespaceId

Namespace whose keyspace this cursor walks.

fn last_key(&self) -> Option<&str>

Key the enumeration stopped at, or None at the start.

fn key_prefix(&self) -> String

Prefix every key this cursor may name lies under.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors