Struct mz_environmentd::deployment::state::DeploymentState
source · pub struct DeploymentState {
inner: Arc<Mutex<DeploymentStateInner>>,
}
Expand description
The state of an environment deployment.
This object should be held by the environmentd
server. It provides methods
to handle state transitions that should be driven by the server itself.
A deployment begins in the Initializing
state.
If, during initialization, the server realizes that it is taking over from a
failed environmentd
process of a generation that is already the leader,
the server may proceed directly to the IsLeader
state, via
DeploymentState::set_is_leader
.
Otherwise, the server should leave the deployment state in Initializing
while performing initialization activities. Once the environment is ready to
take over from the prior generation, the server should call
DeploymentState::set_ready_to_promote
. After this, the server should
not call DeploymentState::set_is_leader
, as an external orchestrator
will determine when promotion occurs. The future returned by
set_ready_to_promote
will resolve when promotion has occurred and the
deployment should take over from the prior generation and begin serving
queries.
Fields§
§inner: Arc<Mutex<DeploymentStateInner>>
Implementations§
source§impl DeploymentState
impl DeploymentState
sourcepub fn new() -> (DeploymentState, DeploymentStateHandle)
pub fn new() -> (DeploymentState, DeploymentStateHandle)
Creates a new LeaderState
for a deployment.
Returns the state and a handle to the state.
sourcepub fn set_ready_to_promote(&self) -> impl Future<Output = ()>
pub fn set_ready_to_promote(&self) -> impl Future<Output = ()>
Marks the deployment as ready to be promoted to leader.
Returns a future that resolves when the leadership promotion occurs.
When the function returns, the state will be ReadyToPromote
. When the
returned future resolves, the state will be Promoting
.
Panics if the leader state is not Initializing
.
sourcepub fn set_is_leader(&self)
pub fn set_is_leader(&self)
Marks the deployment as the leader.
Panics if the leader state is not Initializing
or Promoting
.
Trait Implementations§
source§impl Clone for DeploymentState
impl Clone for DeploymentState
source§fn clone(&self) -> DeploymentState
fn clone(&self) -> DeploymentState
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moreAuto Trait Implementations§
impl Freeze for DeploymentState
impl RefUnwindSafe for DeploymentState
impl Send for DeploymentState
impl Sync for DeploymentState
impl Unpin for DeploymentState
impl UnwindSafe for DeploymentState
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