Struct mz_environmentd::deployment::state::DeploymentStateHandle

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pub struct DeploymentStateHandle {
    inner: Arc<Mutex<DeploymentStateInner>>,
}
Expand description

A cloneable handle to a DeploymentState.

This should be held by modules providing external interfaces to environmentd (e.g., the HTTP server). It provides methods to inspect the current leadership state, and to promote the deployment to the leader if it is ready to do so.

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§inner: Arc<Mutex<DeploymentStateInner>>

Implementations§

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impl DeploymentStateHandle

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pub fn status(&self) -> DeploymentStatus

Returns the current deployment status.

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pub fn try_skip_catchup(&self) -> Result<(), ()>

Attempts to skip the catchup phase for the deployment.

Deployments in the Initializing phase cannot have their catchup phase skipped. Deployments in the ReadyToPromote, Promoting, and IsLeader states can be promoted (with the latter two cases being no-ops).

If skipping the catchup was successful, returns Ok. Otherwise, returns Err.

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pub fn try_promote(&self) -> Result<(), ()>

Attempts to promote this deployment to the leader.

Deployments in the Initializing or CatchingUp state cannot be promoted. Deployments in the ReadyToPromote, Promoting, and IsLeader states can be promoted (with the latter two cases being no-ops).

If the leader was successfully promoted, returns Ok. Otherwise, returns Err.

Trait Implementations§

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impl Clone for DeploymentStateHandle

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fn clone(&self) -> DeploymentStateHandle

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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