Enum mz_catalog::durable::persist::FenceableToken
source · pub(crate) enum FenceableToken {
Initializing {
durable_token: Option<FenceToken>,
current_deploy_generation: Option<u64>,
},
Unfenced {
current_token: FenceToken,
},
Fenced {
current_token: FenceToken,
fence_token: FenceToken,
},
}
Expand description
Enum representing the fenced state of the catalog.
Variants§
Initializing
The catalog is still initializing and learning about previously written fence tokens. This state can be fenced if it encounters a larger deploy generation.
Fields
§
durable_token: Option<FenceToken>
The largest fence token durably written to the catalog, if any.
Unfenced
The current token has not been fenced.
Fields
§
current_token: FenceToken
Fenced
The current token has been fenced.
Implementations§
source§impl FenceableToken
impl FenceableToken
sourcefn validate(&self) -> Result<Option<FenceToken>, FenceError>
fn validate(&self) -> Result<Option<FenceToken>, FenceError>
Returns the current token if it is not fenced, otherwise returns an error.
sourcefn token(&self) -> Option<FenceToken>
fn token(&self) -> Option<FenceToken>
Returns the current token.
sourcefn maybe_fence(&mut self, token: FenceToken) -> Result<(), FenceError>
fn maybe_fence(&mut self, token: FenceToken) -> Result<(), FenceError>
Returns Err
if token
fences out self
, Ok
otherwise.
sourcefn generate_unfenced_token(
&self,
mode: Mode,
) -> Result<Option<(Vec<(StateUpdateKind, Diff)>, FenceableToken)>, DurableCatalogError>
fn generate_unfenced_token( &self, mode: Mode, ) -> Result<Option<(Vec<(StateUpdateKind, Diff)>, FenceableToken)>, DurableCatalogError>
Returns a FenceableToken::Unfenced
token and the updates to the catalog required to
transition to the Unfenced
state if self
is FenceableToken::Initializing
, otherwise
returns None
.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for FenceableToken
impl RefUnwindSafe for FenceableToken
impl Send for FenceableToken
impl Sync for FenceableToken
impl Unpin for FenceableToken
impl UnwindSafe for FenceableToken
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