RegionRoute

common_meta::rpc::router

Struct RegionRoute 

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pub struct RegionRoute {
    pub region: Region,
    pub leader_peer: Option<Peer>,
    pub follower_peers: Vec<Peer>,
    pub leader_state: Option<LeaderState>,
    pub leader_down_since: Option<i64>,
}

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§region: Region§leader_peer: Option<Peer>§follower_peers: Vec<Peer>§leader_state: Option<LeaderState>

None by default.

§leader_down_since: Option<i64>

The start time when the leader is in Downgraded state.

Implementations§

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impl RegionRoute

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pub fn is_leader_downgrading(&self) -> bool

Returns true if the Leader Region is downgraded.

The following cases in which the Region will be downgraded.

  • The Region is unavailable(e.g., Crashed, Network disconnected).
  • The Region was planned to migrate to another Peer.
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pub fn is_leader_staging(&self) -> bool

Returns true if the Leader Region is in staging mode.

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pub fn downgrade_leader(&mut self)

Marks the Leader Region as [RegionState::Downgrading].

We should downgrade a Region before deactivating it:

Notes: Meta Server will renewing a special lease(Downgrading) for the downgrading Region.

A downgrading region will reject any write requests, and only allow memetable to be flushed to object storage

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pub fn set_leader_staging(&mut self)

Sets the Leader Region to staging mode.

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pub fn clear_leader_staging(&mut self)

Clears the leader staging state, returning to normal leader mode.

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pub fn leader_down_millis(&self) -> Option<i64>

Returns how long since the leader is in Downgraded state.

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pub fn set_leader_state(&mut self, state: Option<LeaderState>) -> bool

Sets the leader state.

Returns true if updated.

Trait Implementations§

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impl Clone for RegionRoute

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fn clone(&self) -> RegionRoute

Returns a duplicate 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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impl Debug for RegionRoute

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for RegionRoute

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fn default() -> RegionRoute

Returns the “default value” for a type. Read more
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impl<'de> Deserialize<'de> for RegionRoute

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for RegionRoute

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fn eq(&self, other: &RegionRoute) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Serialize for RegionRoute

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for RegionRoute

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