ktor启动报错:Module function cannot be found for the fully qualified name 'ApplicationKt.module'

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背景

1. 使用Ktor开发服务端,启动时报错:

Exception in thread "main" java.lang.ClassNotFoundException: Module function cannot be found for the fully qualified name 'ApplicationKt.module'
  at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.executeModuleFunction(ApplicationEngineEnvironmentReloading.kt:324)
  at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.instantiateAndConfigureApplication(ApplicationEngineEnvironmentReloading.kt:275)
  at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.createApplication(ApplicationEngineEnvironmentReloading.kt:127)
  at io.ktor.server.engine.ApplicationEngineEnvironmentReloading.start(ApplicationEngineEnvironmentReloading.kt:247)
  at io.ktor.server.netty.NettyApplicationEngine.start(NettyApplicationEngine.kt:106)
  at io.ktor.server.netty.NettyApplicationEngine.start(NettyApplicationEngine.kt:18)
  at io.ktor.server.engine.ApplicationEngine$DefaultImpls.start$default(ApplicationEngine.kt:52)
  at io.ktor.server.netty.EngineMain.main(EngineMain.kt:17)
  at com.cxyzy.ktor.demo.ApplicationKt.main(Application.kt:19)

2. application.conf文件内容:

ktor {
    deployment {
        port = 8080
        port = ${?PORT}
        watch = [ "kotlin-ktor-mongo-sample" ]
    }
    application {
        modules = [ ApplicationKt.module ]
    }
}

mongo {
    connectionString = "mongodb://127.0.0.1:27017/test"
}

问题原因

之前启动类Application.kt是没有包名的,我挪动了一下,增加了包名.

解决方案

修改application.conf中modules的路径,修改为:

application {
        modules = [ com.cxyzy.ktor.demo.ApplicationKt.module ]
 }

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