trait WriteEventAdapter extends AnyRef
Facility to convert to specialised data models, as may be required by specialized persistence Journals.
Typical use cases include (but are not limited to):
- adding metadata, a.k.a. "tagging" - by wrapping objects into tagged counterparts
- manually converting to the Journals storage format, such as JSON, BSON or any specialised binary format
- splitting up large events into sequences of smaller ones
- Source
- EventAdapter.scala
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Abstract Value Members
- abstract def manifest(event: Any): String
Return the manifest (type hint) that will be provided in the
fromJournalmethod.Return the manifest (type hint) that will be provided in the
fromJournalmethod. Use""if manifest is not needed. - abstract def toJournal(event: Any): Any
Convert domain event to journal event type.
Convert domain event to journal event type.
Some journal may require a specific type to be returned to them, for example if a primary key has to be associated with each event then a journal may require adapters to return
com.example.myjournal.EventWithPrimaryKey(event, key).The
toJournaladaptation must be an 1-to-1 transformation. It is not allowed to drop incoming events during thetoJournaladaptation.- event
the application-side domain event to be adapted to the journal model
- returns
the adapted event object, possibly the same object if no adaptation was performed
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- This member is added by an implicit conversion from WriteEventAdapter toany2stringadd[WriteEventAdapter] performed by method any2stringadd in scala.Predef.
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- def ->[B](y: B): (WriteEventAdapter, B)
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- This member is added by an implicit conversion from WriteEventAdapter toArrowAssoc[WriteEventAdapter] performed by method ArrowAssoc in scala.Predef.
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- @throws(classOf[java.lang.CloneNotSupportedException]) @HotSpotIntrinsicCandidate() @native()
- def ensuring(cond: (WriteEventAdapter) => Boolean, msg: => Any): WriteEventAdapter
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- This member is added by an implicit conversion from WriteEventAdapter toEnsuring[WriteEventAdapter] performed by method Ensuring in scala.Predef.
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- Ensuring
- def ensuring(cond: (WriteEventAdapter) => Boolean): WriteEventAdapter
- Implicit
- This member is added by an implicit conversion from WriteEventAdapter toEnsuring[WriteEventAdapter] performed by method Ensuring in scala.Predef.
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- Ensuring
- def ensuring(cond: Boolean, msg: => Any): WriteEventAdapter
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- This member is added by an implicit conversion from WriteEventAdapter toEnsuring[WriteEventAdapter] performed by method Ensuring in scala.Predef.
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- Ensuring
- def ensuring(cond: Boolean): WriteEventAdapter
- Implicit
- This member is added by an implicit conversion from WriteEventAdapter toEnsuring[WriteEventAdapter] performed by method Ensuring in scala.Predef.
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- Deprecated
(Since version 9)
- def formatted(fmtstr: String): String
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- This member is added by an implicit conversion from WriteEventAdapter toStringFormat[WriteEventAdapter] performed by method StringFormat in scala.Predef.
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- @deprecated @inline()
- Deprecated
(Since version 2.12.16) Use
formatString.format(value)instead ofvalue.formatted(formatString), or use thef""string interpolator. In Java 15 and later,formattedresolves to the new method in String which has reversed parameters.
- def →[B](y: B): (WriteEventAdapter, B)
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- This member is added by an implicit conversion from WriteEventAdapter toArrowAssoc[WriteEventAdapter] performed by method ArrowAssoc in scala.Predef.
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- Deprecated
(Since version 2.13.0) Use
->instead. If you still wish to display it as one character, consider using a font with programming ligatures such as Fira Code.