ClusterSharding

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Defined in: src/cluster/sharding/ClusterSharding.ts:75

User-facing entry point. Attaches to an ActorSystem + Cluster pair and lets you start a sharded region for each entity type. A ShardCoordinator is spawned lazily on every node; only the one hosted by the current cluster leader is active — the rest act as warm standbys.

Properties

cluster

readonly cluster: Cluster

Defined in: src/cluster/sharding/ClusterSharding.ts:81

system

readonly system: ActorSystem

Defined in: src/cluster/sharding/ClusterSharding.ts:80

Methods

start()

Call Signature

start<TMsg>(settings): ActorRef<TMsg>

Defined in: src/cluster/sharding/ClusterSharding.ts:118

Start a sharded region for a type. Three calling shapes:

// Shorthand: pass the entity class.  Framework wraps it with Props.create.
sharding.start('counter', CounterEntity, {
  extractEntityId: (msg) => msg.id,
});

// Shorthand: pass a factory.  Useful for closures / DI / no-arg new.
sharding.start('cart', () => new CartEntity(deps), {
  extractEntityId: (msg) => msg.entityId,
});

// Full-form: explicit Props + all settings (unchanged).
sharding.start({
  typeName: 'counter',
  entityProps: Props.create(() => new CounterEntity()),
  extractEntityId: (msg) => msg.id,
});

Type Parameters

TMsg

TMsg

Parameters

settings

StartSettings<TMsg>

Returns

ActorRef<TMsg>

Call Signature

start<TMsg>(typeName, entity, opts): ActorRef<TMsg>

Defined in: src/cluster/sharding/ClusterSharding.ts:119

Start a sharded region for a type. Three calling shapes:

// Shorthand: pass the entity class.  Framework wraps it with Props.create.
sharding.start('counter', CounterEntity, {
  extractEntityId: (msg) => msg.id,
});

// Shorthand: pass a factory.  Useful for closures / DI / no-arg new.
sharding.start('cart', () => new CartEntity(deps), {
  extractEntityId: (msg) => msg.entityId,
});

// Full-form: explicit Props + all settings (unchanged).
sharding.start({
  typeName: 'counter',
  entityProps: Props.create(() => new CounterEntity()),
  extractEntityId: (msg) => msg.id,
});