Enum ServerState 

pub enum ServerState {
    Active,
    Starting,
    Releasing,
    Down,
}

サーバーの状態

状態遷移

Down → Active → Starting → Active → Releasing → Active → ...
                   ↑                    ↓
                   └────────────────────┘

リクエスト可能性

状態	リクエスト先	is_available
Active	アクティブサーバー	true
Starting	旧サーバー（まだ稼働中）	true
Releasing	新サーバー（既に稼働中）	true
Down	なし	false

Variants

Active

正常稼働中

Starting

新サーバー起動中（旧サーバーはまだ稼働中、リクエスト可能）

Releasing

旧サーバー停止中（新サーバーは既に稼働中、リクエスト可能）

Down

両方停止

Implementations

impl ServerState

pub fn is_available(&self) -> bool

リクエスト可能かどうか

Trait Implementations

impl Clone for ServerState

fn clone(&self) -> ServerState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ServerState

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

Formats the value using the given formatter.

impl PartialEq for ServerState

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

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

impl Eq for ServerState

impl StructuralPartialEq for ServerState