Fabrice Lecomte
286dedac76
implement GameStateRepositoryTest
add lambda to the GameEventHandler.handle{} to set the version
add VersionBuilder
add version to the events
add creation date to the events
rename gameId to aggregateId
add EventHandler interface
47 lines
1.3 KiB
Kotlin
47 lines
1.3 KiB
Kotlin
package eventDemo.libs.event
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import io.github.oshai.kotlinlogging.KotlinLogging
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import java.util.Queue
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import java.util.concurrent.ConcurrentLinkedQueue
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import kotlin.reflect.KClass
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/**
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* An In-Memory implementation of an event stream.
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*
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* All methods are implemented.
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*/
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class EventStreamInMemory<E : Event<ID>, ID : AggregateId> : EventStream<E, ID> {
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private val logger = KotlinLogging.logger {}
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private val events: Queue<E> = ConcurrentLinkedQueue()
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override fun publish(event: E) {
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events.add(event)
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logger.atInfo {
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message = "Event published: $event"
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payload = mapOf("event" to event)
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}
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}
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override fun publish(vararg events: E) {
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events.forEach { publish(it) }
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}
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override fun readLast(aggregateId: ID): E? = events.lastOrNull()
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override fun <R : E> readLastOf(
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aggregateId: ID,
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eventType: KClass<out R>,
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): R? =
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events
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.filterIsInstance(eventType.java)
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.lastOrNull { it.aggregateId == aggregateId }
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override fun readAll(aggregateId: ID): Set<E> =
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events
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.filter { it.aggregateId == aggregateId }
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.toSet()
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}
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inline fun <reified R : E, E : Event<ID>, ID : AggregateId> EventStream<E, ID>.readLastOf(aggregateId: ID): R? =
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readLastOf(aggregateId, R::class)
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