trait ReadJournal extends AnyRef

API for reading persistent events and information derived from stored persistent events.

The purpose of the API is not to enforce compatibility between different journal implementations, because the technical capabilities may be very different. The interface is very open so that different journals may implement specific queries.

There are a few pre-defined queries that a query implementation may implement, such as EventsByPersistenceIdQuery, PersistenceIdsQuery and EventsByTagQuery Implementation of these queries are optional and query (journal) plugins may define their own specialized queries by implementing other methods.

Usage:

val journal = PersistenceQuery(system).readJournalFor[SomeCoolReadJournal](queryPluginConfigPath)
val events = journal.query(EventsByTag("mytag", 0L))

For Java API see akka.persistence.query.javadsl.ReadJournal.

Source
ReadJournal.scala
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  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
    Definition Classes
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  3. def +(other: String): String
    Implicit
    This member is added by an implicit conversion from ReadJournal to any2stringadd[ReadJournal] performed by method any2stringadd in scala.Predef.
    Definition Classes
    any2stringadd
  4. def ->[B](y: B): (ReadJournal, B)
    Implicit
    This member is added by an implicit conversion from ReadJournal to ArrowAssoc[ReadJournal] performed by method ArrowAssoc in scala.Predef.
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  5. final def ==(arg0: Any): Boolean
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  6. final def asInstanceOf[T0]: T0
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  7. def clone(): AnyRef
    Attributes
    protected[java.lang]
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    @native() @throws( ... )
  8. def ensuring(cond: (ReadJournal) ⇒ Boolean, msg: ⇒ Any): ReadJournal
    Implicit
    This member is added by an implicit conversion from ReadJournal to Ensuring[ReadJournal] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  9. def ensuring(cond: (ReadJournal) ⇒ Boolean): ReadJournal
    Implicit
    This member is added by an implicit conversion from ReadJournal to Ensuring[ReadJournal] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  10. def ensuring(cond: Boolean, msg: ⇒ Any): ReadJournal
    Implicit
    This member is added by an implicit conversion from ReadJournal to Ensuring[ReadJournal] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  11. def ensuring(cond: Boolean): ReadJournal
    Implicit
    This member is added by an implicit conversion from ReadJournal to Ensuring[ReadJournal] performed by method Ensuring in scala.Predef.
    Definition Classes
    Ensuring
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
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  13. def equals(arg0: Any): Boolean
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  14. def finalize(): Unit
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    @throws( classOf[java.lang.Throwable] )
  15. def formatted(fmtstr: String): String
    Implicit
    This member is added by an implicit conversion from ReadJournal to StringFormat[ReadJournal] performed by method StringFormat in scala.Predef.
    Definition Classes
    StringFormat
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    @inline()
  16. final def getClass(): Class[_]
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  22. final def synchronized[T0](arg0: ⇒ T0): T0
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  23. def toString(): String
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  24. final def wait(): Unit
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  25. final def wait(arg0: Long, arg1: Int): Unit
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  26. final def wait(arg0: Long): Unit
    Definition Classes
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  27. def [B](y: B): (ReadJournal, B)
    Implicit
    This member is added by an implicit conversion from ReadJournal to ArrowAssoc[ReadJournal] performed by method ArrowAssoc in scala.Predef.
    Definition Classes
    ArrowAssoc

Inherited from AnyRef

Inherited from Any

Inherited by implicit conversion any2stringadd from ReadJournal to any2stringadd[ReadJournal]

Inherited by implicit conversion StringFormat from ReadJournal to StringFormat[ReadJournal]

Inherited by implicit conversion Ensuring from ReadJournal to Ensuring[ReadJournal]

Inherited by implicit conversion ArrowAssoc from ReadJournal to ArrowAssoc[ReadJournal]

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