class ClusterSharding extends Extension

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  1. new ClusterSharding(system: ExtendedActorSystem)

Value Members

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  6. def defaultShardAllocationStrategy(settings: ClusterShardingSettings): ShardAllocationStrategy

    The default ShardAllocationStrategy is configured by least-shard-allocation-strategy properties.

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  10. def getShardTypeNames: Set[String]

    Java API: get all currently defined sharding type names.

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  16. def shardRegion(typeName: String): ActorRef

    Retrieve the actor reference of the ShardRegion actor responsible for the named entity type.

    Retrieve the actor reference of the ShardRegion actor responsible for the named entity type. The entity type must be registered with the #start or #startProxy method before it can be used here. Messages to the entity is always sent via the ShardRegion.

  17. def shardRegionProxy(typeName: String, dataCenter: DataCenter): ActorRef

    Retrieve the actor reference of the ShardRegion actor that will act as a proxy to the named entity type running in another data center.

    Retrieve the actor reference of the ShardRegion actor that will act as a proxy to the named entity type running in another data center. A proxy within the same data center can be accessed with #shardRegion instead of this method. The entity type must be registered with the #startProxy method before it can be used here. Messages to the entity is always sent via the ShardRegion.

  18. def shardTypeNames: Set[String]

    Scala API: get all currently defined sharding type names.

  19. def start(typeName: String, entityProps: Props, messageExtractor: MessageExtractor): ActorRef

    Java/Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Java/Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    The default shard allocation strategy ShardCoordinator.LeastShardAllocationStrategy is used. pekko.actor.PoisonPill is used as handOffStopMessage.

    This method will start a ShardRegion in proxy mode when there is no match between the node roles and the role specified in the ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    messageExtractor

    functions to extract the entity id, shard id, and the message to send to the entity from the incoming message

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  20. def start(typeName: String, entityProps: Props, settings: ClusterShardingSettings, messageExtractor: MessageExtractor): ActorRef

    Java/Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Java/Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    The default shard allocation strategy ShardCoordinator.LeastShardAllocationStrategy is used. pekko.actor.PoisonPill is used as handOffStopMessage.

    This method will start a ShardRegion in proxy mode when there is no match between the node roles and the role specified in the ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    settings

    configuration settings, see ClusterShardingSettings

    messageExtractor

    functions to extract the entity id, shard id, and the message to send to the entity from the incoming message

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  21. def start(typeName: String, entityProps: Props, settings: ClusterShardingSettings, messageExtractor: MessageExtractor, allocationStrategy: ShardAllocationStrategy, handOffStopMessage: Any): ActorRef

    Java/Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Java/Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    This method will start a ShardRegion in proxy mode when there is no match between the node roles and the role specified in the ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    settings

    configuration settings, see ClusterShardingSettings

    messageExtractor

    functions to extract the entity id, shard id, and the message to send to the entity from the incoming message, see ShardRegion.MessageExtractor

    allocationStrategy

    possibility to use a custom shard allocation and rebalancing logic

    handOffStopMessage

    the message that will be sent to entities when they are to be stopped for a rebalance or graceful shutdown of a ShardRegion, e.g. PoisonPill.

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  22. def start(typeName: String, entityProps: Props, extractEntityId: ExtractEntityId, extractShardId: ExtractShardId): ActorRef

    Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the shardRegion method.

    The default shard allocation strategy ShardCoordinator.LeastShardAllocationStrategy is used. pekko.actor.PoisonPill is used as handOffStopMessage.

    This method will start a ShardRegion in proxy mode when there is no match between the node roles and the role specified in the ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    extractEntityId

    partial function to extract the entity id and the message to send to the entity from the incoming message, if the partial function does not match the message will be unhandled, i.e. posted as Unhandled messages on the event stream

    extractShardId

    function to determine the shard id for an incoming message, only messages that passed the extractEntityId will be used

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  23. def start(typeName: String, entityProps: Props, settings: ClusterShardingSettings, extractEntityId: ExtractEntityId, extractShardId: ExtractShardId): ActorRef

    Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the shardRegion method.

    The default shard allocation strategy ShardCoordinator.LeastShardAllocationStrategy is used. pekko.actor.PoisonPill is used as handOffStopMessage.

    This method will start a ShardRegion in proxy mode when there is no match between the node roles and the role specified in the ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    settings

    configuration settings, see ClusterShardingSettings

    extractEntityId

    partial function to extract the entity id and the message to send to the entity from the incoming message, if the partial function does not match the message will be unhandled, i.e. posted as Unhandled messages on the event stream

    extractShardId

    function to determine the shard id for an incoming message, only messages that passed the extractEntityId will be used

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  24. def start(typeName: String, entityProps: Props, extractEntityId: ExtractEntityId, extractShardId: ExtractShardId, allocationStrategy: ShardAllocationStrategy, handOffStopMessage: Any): ActorRef

    Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the shardRegion method.

    This method will start a ShardRegion in proxy mode when there is no match between the roles of the current cluster node and the role specified in ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    extractEntityId

    partial function to extract the entity id and the message to send to the entity from the incoming message, if the partial function does not match the message will be unhandled, i.e. posted as Unhandled messages on the event stream

    extractShardId

    function to determine the shard id for an incoming message, only messages that passed the extractEntityId will be used

    allocationStrategy

    possibility to use a custom shard allocation and rebalancing logic

    handOffStopMessage

    the message that will be sent to entities when they are to be stopped for a rebalance or graceful shutdown of a ShardRegion, e.g. PoisonPill.

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  25. def start(typeName: String, entityProps: Props, settings: ClusterShardingSettings, extractEntityId: ExtractEntityId, extractShardId: ExtractShardId, allocationStrategy: ShardAllocationStrategy, handOffStopMessage: Any): ActorRef

    Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages.

    Scala API: Register a named entity type by defining the pekko.actor.Props of the entity actor and functions to extract entity and shard identifier from messages. The ShardRegion actor for this type can later be retrieved with the shardRegion method.

    This method will start a ShardRegion in proxy mode when there is no match between the roles of the current cluster node and the role specified in ClusterShardingSettings passed to this method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    entityProps

    the Props of the entity actors that will be created by the ShardRegion

    settings

    configuration settings, see ClusterShardingSettings

    extractEntityId

    partial function to extract the entity id and the message to send to the entity from the incoming message, if the partial function does not match the message will be unhandled, i.e. posted as Unhandled messages on the event stream

    extractShardId

    function to determine the shard id for an incoming message, only messages that passed the extractEntityId will be used

    allocationStrategy

    possibility to use a custom shard allocation and rebalancing logic

    handOffStopMessage

    the message that will be sent to entities when they are to be stopped for a rebalance or graceful shutdown of a ShardRegion, e.g. PoisonPill.

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  26. def startProxy(typeName: String, role: Optional[String], dataCenter: Optional[String], messageExtractor: MessageExtractor): ActorRef

    Java/Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e.

    Java/Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e. it will delegate messages to other ShardRegion actors on other nodes, but not host any entity actors itself. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    role

    specifies that this entity type is located on cluster nodes with a specific role. If the role is not specified all nodes in the cluster are used.

    dataCenter

    The data center of the cluster nodes where the cluster sharding is running. If None then the same data center as current node.

    messageExtractor

    functions to extract the entity id, shard id, and the message to send to the entity from the incoming message

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  27. def startProxy(typeName: String, role: Optional[String], messageExtractor: MessageExtractor): ActorRef

    Java/Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e.

    Java/Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e. it will delegate messages to other ShardRegion actors on other nodes, but not host any entity actors itself. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    role

    specifies that this entity type is located on cluster nodes with a specific role. If the role is not specified all nodes in the cluster are used.

    messageExtractor

    functions to extract the entity id, shard id, and the message to send to the entity from the incoming message

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  28. def startProxy(typeName: String, role: Option[String], dataCenter: Option[DataCenter], extractEntityId: ExtractEntityId, extractShardId: ExtractShardId): ActorRef

    Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e.

    Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e. it will delegate messages to other ShardRegion actors on other nodes, but not host any entity actors itself. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    role

    specifies that this entity type is located on cluster nodes with a specific role. If the role is not specified all nodes in the cluster are used.

    dataCenter

    The data center of the cluster nodes where the cluster sharding is running. If None then the same data center as current node.

    extractEntityId

    partial function to extract the entity id and the message to send to the entity from the incoming message, if the partial function does not match the message will be unhandled, i.e. posted as Unhandled messages on the event stream

    extractShardId

    function to determine the shard id for an incoming message, only messages that passed the extractEntityId will be used

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

  29. def startProxy(typeName: String, role: Option[String], extractEntityId: ExtractEntityId, extractShardId: ExtractShardId): ActorRef

    Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e.

    Scala API: Register a named entity type ShardRegion on this node that will run in proxy only mode, i.e. it will delegate messages to other ShardRegion actors on other nodes, but not host any entity actors itself. The ShardRegion actor for this type can later be retrieved with the #shardRegion method.

    Some settings can be configured as described in the pekko.cluster.sharding section of the reference.conf.

    typeName

    the name of the entity type

    role

    specifies that this entity type is located on cluster nodes with a specific role. If the role is not specified all nodes in the cluster are used.

    extractEntityId

    partial function to extract the entity id and the message to send to the entity from the incoming message, if the partial function does not match the message will be unhandled, i.e. posted as Unhandled messages on the event stream

    extractShardId

    function to determine the shard id for an incoming message, only messages that passed the extractEntityId will be used

    returns

    the actor ref of the ShardRegion that is to be responsible for the shard

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