CassandraReadSideProcessor

Instance Constructors

new CassandraReadSideProcessor()

Type Members

case class EventHandlers(handlers: Map[Class[_ <: Event], BiFunction[_ <: Event, UUID, CompletionStage[List[BoundStatement]]]]) extends Product with Serializable
class EventHandlersBuilder extends AnyRef

Mutable builder for defining event handlers.

Abstract Value Members

abstract def aggregateTag: AggregateEventTag[Event]

The processed events belong to a com.lightbend.lagom.javadsl.persistence.AggregateEventTag that is specified by this method, e.g.
The processed events belong to a com.lightbend.lagom.javadsl.persistence.AggregateEventTag that is specified by this method, e.g. all persistent events of all Order entities.
abstract def defineEventHandlers(builder: EventHandlersBuilder): EventHandlers

Define the event handlers that are to be used.
Define the event handlers that are to be used. Use the supplied builder to define the event handlers. One handler for each event class. A handler is a BiFunction that takes the event and the offset as parameters and returns zero or more bound statements that will be executed before processing next event.
abstract def prepare(session: CassandraSession): CompletionStage[Optional[UUID]]

First you must tell where in the event stream the processing should start, i.e.
First you must tell where in the event stream the processing should start, i.e. return the offset. The current offset is a parameter to the event handler for each event and it should typically be stored so that it can be restored with a select statement here. Use the CassandraSession to get the stored offset.
Other things that is typically performed in this method is to create prepared statements that are later used when processing the events. Use CassandraSession#prepare to create the prepared statements.
Return #noOffset if you want to processes all events, e.g. when starting the first time or if the number of events are known to be small enough to processes all events.

Concrete Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
def +(other: String): String

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to any2stringadd[CassandraReadSideProcessor[Event]] performed by method any2stringadd in scala.Predef.
Definition Classes
any2stringadd
def ->[B](y: B): (CassandraReadSideProcessor[Event], B)

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to ArrowAssoc[CassandraReadSideProcessor[Event]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc
Annotations
@inline()
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def completedStatement(stmt: BoundStatement): CompletionStage[List[BoundStatement]]

Convenience method to create an already completed CompletionStage with one BoundStatement.
final def completedStatements(stmts: List[BoundStatement]): CompletionStage[List[BoundStatement]]

Convenience method to create an already completed CompletionStage with several BoundStatement.
final val emptyStatements: CompletionStage[List[BoundStatement]]

Convenience method to create an already completed CompletionStage with zero BoundStatement.
def ensuring(cond: (CassandraReadSideProcessor[Event]) ⇒ Boolean, msg: ⇒ Any): CassandraReadSideProcessor[Event]

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to Ensuring[CassandraReadSideProcessor[Event]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: (CassandraReadSideProcessor[Event]) ⇒ Boolean): CassandraReadSideProcessor[Event]

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to Ensuring[CassandraReadSideProcessor[Event]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean, msg: ⇒ Any): CassandraReadSideProcessor[Event]

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to Ensuring[CassandraReadSideProcessor[Event]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
def ensuring(cond: Boolean): CassandraReadSideProcessor[Event]

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to Ensuring[CassandraReadSideProcessor[Event]] performed by method Ensuring in scala.Predef.
Definition Classes
Ensuring
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
def formatted(fmtstr: String): String

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to StringFormat[CassandraReadSideProcessor[Event]] performed by method StringFormat in scala.Predef.
Definition Classes
StringFormat
Annotations
@inline()
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final val noOffset: CompletionStage[Optional[UUID]]
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
def →[B](y: B): (CassandraReadSideProcessor[Event], B)

Implicit information
This member is added by an implicit conversion from CassandraReadSideProcessor[Event] to ArrowAssoc[CassandraReadSideProcessor[Event]] performed by method ArrowAssoc in scala.Predef.
Definition Classes
ArrowAssoc

Related Doc: package cassandra

abstract class CassandraReadSideProcessor[Event <: AggregateEvent[Event]] extends AnyRef

Instance Constructors

new CassandraReadSideProcessor()

Type Members

case class EventHandlers(handlers: Map[Class[_ <: Event], BiFunction[_ <: Event, UUID, CompletionStage[List[BoundStatement]]]]) extends Product with Serializable

class EventHandlersBuilder extends AnyRef

Abstract Value Members

abstract def aggregateTag: AggregateEventTag[Event]

abstract def defineEventHandlers(builder: EventHandlersBuilder): EventHandlers

abstract def prepare(session: CassandraSession): CompletionStage[Optional[UUID]]

Concrete Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

def +(other: String): String

def ->[B](y: B): (CassandraReadSideProcessor[Event], B)

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def completedStatement(stmt: BoundStatement): CompletionStage[List[BoundStatement]]

final def completedStatements(stmts: List[BoundStatement]): CompletionStage[List[BoundStatement]]

final val emptyStatements: CompletionStage[List[BoundStatement]]

def ensuring(cond: (CassandraReadSideProcessor[Event]) ⇒ Boolean, msg: ⇒ Any): CassandraReadSideProcessor[Event]

def ensuring(cond: (CassandraReadSideProcessor[Event]) ⇒ Boolean): CassandraReadSideProcessor[Event]

def ensuring(cond: Boolean, msg: ⇒ Any): CassandraReadSideProcessor[Event]

def ensuring(cond: Boolean): CassandraReadSideProcessor[Event]

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

def formatted(fmtstr: String): String

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final val noOffset: CompletionStage[Optional[UUID]]

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

def →[B](y: B): (CassandraReadSideProcessor[Event], B)

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from CassandraReadSideProcessor[Event] to any2stringadd[CassandraReadSideProcessor[Event]]

Inherited by implicit conversion StringFormat from CassandraReadSideProcessor[Event] to StringFormat[CassandraReadSideProcessor[Event]]

Inherited by implicit conversion Ensuring from CassandraReadSideProcessor[Event] to Ensuring[CassandraReadSideProcessor[Event]]

Inherited by implicit conversion ArrowAssoc from CassandraReadSideProcessor[Event] to ArrowAssoc[CassandraReadSideProcessor[Event]]

Ungrouped