Trait ColorOutputPersistence 

pub trait ColorOutputPersistence: Send + Sync {
    // Required methods
    fn load(
        &self,
        object: ObjectIdentifier,
    ) -> Result<Option<ColorOutputSnapshot>, Error>;
    fn save(
        &self,
        object: ObjectIdentifier,
        snapshot: &ColorOutputSnapshot,
    ) -> Result<(), Error>;
}

Application-owned storage for one colour object’s Present_Value.

The object calls load once, as it takes the storage, and save from its writer thread, one call at a time. A backend that refuses a save returns an error and keeps what it held.

Required Methods

fn load( &self, object: ObjectIdentifier, ) -> Result<Option<ColorOutputSnapshot>, Error>

What was last saved for object, or None when nothing was saved.

fn save( &self, object: ObjectIdentifier, snapshot: &ColorOutputSnapshot, ) -> Result<(), Error>

Durably replace what is saved for object with snapshot.

Dyn Compatibility

This trait is dyn compatible.

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

Implementors

impl ColorOutputPersistence for FileColorOutputPersistence