Question

“ @ ApplicationScope”为服务定义的@Inject注释无法在Kotlin中注入。

“ kotlin.UninitializedPropertyAccessException：lateinit属性问候尚未初始化”

关于类似问题的解释： “此问题是Kotlin处理注释的方式以及...注释定义中缺少@Target的综合结果。添加@field：xxx”

问题是，我该如何进行服务注入？

import com.amazonaws.services.lambda.runtime.Context
import com.amazonaws.services.lambda.runtime.RequestHandler
import javax.enterprise.context.ApplicationScoped
import javax.inject.Inject


class HelloRequest() {
    var firstName: String? = null
    var lastName: String? = null
}

@ApplicationScoped
open class HelloGreeter() {
    open fun greet(firstName: String?, lastName: String?): String {
        return "$firstName, $lastName"
    }
}

class HelloLambda : RequestHandler<HelloRequest, String> {

    @Inject
    lateinit var greeter: HelloGreeter

    override fun handleRequest(request: HelloRequest, context: Context): String {
        return greeter.greet(request.firstName, request.lastName)
    }
}

类似的问题： “此问题是由于Kotlin处理注释的方式以及...注释定义中缺少@Target的组合。添加@field：xxx”

Error to inject some dependency with kotlin + quarkus

SmallRye Reactive Messaging's Emitter<>.send doesn't send in Kotlin via AMQP broker with Quarkus

Answer 1

我使用标准的REST服务测试了修改后的@field：xx，并通过@field：ApplicationScoped对其进行了限定，现在它可以正常工作。

以上问题的答案将是使用Quarkus Amazon Lambda扩展时没有运行时CDI。

import javax.enterprise.context.ApplicationScoped
import javax.inject.Inject
import javax.ws.rs.GET
import javax.ws.rs.Path
import javax.ws.rs.PathParam
import javax.ws.rs.Produces
import javax.ws.rs.core.MediaType


@ApplicationScoped
open class GreetingService2 {

    fun greeting(name: String): String {
        return "hello $name"
    }

}

@Path("/")
class GreetingResource {

    @Inject
    @field: ApplicationScoped
    lateinit var service: GreetingService2

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    @Path("/greeting/{name}")
    fun greeting(@PathParam("name") name: String): String {
        return service.greeting(name)
    }

    @GET
    @Produces(MediaType.TEXT_PLAIN)
    fun hello(): String {
        return "hello"
    }
}

Quarkus Kotlin注入失败

1 个答案: