spring-boot/me.ahoo.wow.spring.boot/InMemoryTopicsAutoConfiguration

InMemoryTopicsAutoConfiguration

@AutoConfiguration

@Conditional(value = [InMemoryTopicsAutoConfiguration.OnMemory::class])

@EnableConfigurationProperties(value = [WowProperties::class])

class InMemoryTopicsAutoConfiguration(environment: Environment)

The node's topics in its JVM, for trying a service out without Kafka (DX gap G27), when wow.transport selects them (TransportSelection.MEMORY: memory, or auto in development without a configured transport): one InMemoryTopics of wow.log.partitions partitions, each keeping its last wow.memory.topic-retention messages, unless the application has one of its own, as wow-kafka's beans give them on Kafka:

the SourceTopics with the producer and the intake, so each context the node hosts executes its command topic, whose topics the node creates at its start (Ddl.AUTO);
the PublishedSinks of the streams the Manifest publishes.

It warns at startup that nothing leaves the JVM. wow.transport=memory outside development is refused.