关闭/关闭Kodein上下文

时间:2018-06-21 16:13:46

标签: kotlin kodein

在我的应用程序中,我维护了一些Kodein上下文,并且在Kodein上下文中有一些共享资源,当不再需要它所属的上下文时,我想关闭这些资源。

下面是问题的简单说明:

class SomeConnectionPool: Closeable {
    override fun close() { /* some operation */ }
}

class SomeResource: Closeable {
    override fun close() { /* some operation */ }
}

class SomeService(val pool: SomeConnectionPool) {
    fun doStuff() { /* some operation */ }
}

class SomeOtherService(val pool: SomeConnectionPool) {
    fun doOtherStuff() { /* some operation */ }
}

val kodein = Kodein {
    bind<SomeConnectionPool>() with singleton { SomeConnectionPool() }
    bind<SomeResource>() with singleton { SomeResource() }

    bind<SomeService>() with singleton { SomeService(instance()) }
    bind<SomeOtherService>() with singleton { SomeOtherService(instance()) }
}

fun main(args: Array<String>) {
    val service: SomeService by kodein.instance()
    service.doStuff()

    // this will initialize everything even the unused bindings
    val resources by kodein.allInstances<Closeable>()
    resources.forEach { it.close() }
}

理想情况下,应该实现几个属性:

  • 仅检索已初始化的Closeable实例并将其关闭
  • SomeServiceSomeOtherService不应该负责关闭SomeConnectionPool,因为它们没有创建实例。他们还不知道该池是否仍在被其他人使用。

我还考虑过仅从kodein.container中检索初始化的绑定,但是似乎没有明显的方法。

1 个答案:

答案 0 :(得分:1)