8000 Java DSL throws exception when using `typed.javadsl.EventSourcedBehavior#lastSequenceNumber` · Issue #32433 · akka/akka · GitHub
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Java DSL throws exception when using typed.javadsl.EventSourcedBehavior#lastSequenceNumber #32433

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aludwiko opened this issue May 27, 2024 · 4 comments
Open

Java DSL throws exception when using typed.javadsl.EventSourcedBehavior#lastSequenceNumber #32433

aludwiko opened this issue May 27, 2024 · 4 comments

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@aludwiko
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When handling the first event in the event handler:

java.lang.IllegalStateException: Cannot extract the lastSequenceNumber in state akka.actor.typed.internal.BehaviorImpl$DeferredBehavior$$anon$1
	at akka.persistence.typed.scaladsl.EventSourcedBehavior$.lastSequenceNumber(EventSourcedBehavior.scala:115)
	at akka.persistence.typed.javadsl.EventSourcedBehavior.lastSequenceNumber(EventSourcedBehavior.scala:263)
	at perf.test.iot.DeviceEntity.eventHandler(DeviceEntity.java:82)
	at akka.persistence.typed.javadsl.EventSourcedBehavior.createEventSourcedBehavior(EventSourcedBehavior.scala:224)
	at akka.persistence.typed.javadsl.EventSourcedBehavior.apply(EventSourcedBehavior.scala:207)

I think that pattern matching should also cover Deferred wrapper:
image
@aludwiko aludwiko changed the title Java DSL throws exception when using akka.persistence.typed.javadsl.EventSourcedBehavior#lastSequenceNumber Java DSL throws exception when using typed.javadsl.EventSourcedBehavior#lastSequenceNumber May 27, 2024
@johanandren
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When handling the first event in the event handler

On replay, or after handling a command?

@johanandren
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For the record, Deferred means the behavior was not created yet, it just contains a factory context => behavior, so there is no way to look "inside" it.

Can you share exactly what the event handler method looks like?

@aludwiko
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When handling the first event in the event handler

On replay, or after handling a command?

After handling a command.

@leviramsey
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leviramsey commented Jul 14, 2024 via email

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@johanandren @aludwiko @leviramsey
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