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kotlin static factory with spring injected dependency

Elegant Elephant answered on January 26, 2024 Popularity 2/10 Helpfulness 1/10

answer kotlin static factory with spring injected dependency

kotlin static factory with spring injected dependency

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// Kotlin code, Java format:
@Component
class ClassWithDependencyFactory(
    dependency: DependencyRepository,
) {
    private val stuffListCache: List<String> = dependency.getAllStuff()
            ?.map { c -> c.code }
            ?: error("Failed to Stuff list")
    

    fun factoryMethodStuff() = stuffListCache
    @PostConstruct
    private fun storeSingleton() {
        instance = this
    }
    companion object {
        fun instance() = instance
    }
}

private lateinit var instance: ClassWithDependencyFactory

## Another example with Companion Object setter:
@Bean
fun factory(dependency: DependencyRepository) = ClassWithDependencyFactory(dependency).also{ClassWithDependencyFactory.setInstance(it)}

class ClassWithDependencyFactory(
    dependency: DependencyRepository,
) {
    private val stuffListCache: List<String> = dependency.getAllStuff()
            ?.map { c -> c.code }
            ?: error("Failed to Stuff list")
    
    fun factoryMethodStuff() = stuffListCache
    companion object {
        private lateinit var instance: ClassWithDependencyFactory
        fun setInstance(i : ClassWithDependencyFactory) {
            this.instance = i
        }
        fun instance() = instance
    }
}

Popularity 2/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java kotlin spring static-factory

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Contributed on Jan 26 2024

Elegant Elephant

0 Answers Avg Quality 2/10

kotlin static factory with spring injected dependency

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