72 lines
2.3 KiB
Kotlin
72 lines
2.3 KiB
Kotlin
package dorkboxTest.network.rmi
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import junit.framework.TestCase
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import kotlinx.coroutines.delay
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import kotlinx.coroutines.runBlocking
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import java.lang.reflect.InvocationHandler
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import java.lang.reflect.Method
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import java.lang.reflect.Proxy
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import kotlin.coroutines.Continuation
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import kotlin.coroutines.EmptyCoroutineContext
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import kotlin.coroutines.resume
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// https://gist.github.com/hiperbou/283e6531fb2b71b324d5064f820df889
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// https://github.com/Kotlin/kotlinx.coroutines/pull/1667
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class SuspendProxyTest : TestCase() {
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interface Adder{
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suspend fun add(a:Int, b:Int):Int
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fun addSync(a:Int, b:Int):Int
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}
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class SuspendHandler(private val delegate:Adder):InvocationHandler {
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override fun invoke(proxy: Any, method: Method, arguments: Array<Any>): Any {
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val suspendCoroutineObject = arguments.lastOrNull()
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return if (suspendCoroutineObject is Continuation<*>) {
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val parameters = arguments.copyOf(arguments.size - 1)
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@Suppress("UNCHECKED_CAST")
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val continuation = suspendCoroutineObject as Continuation<Any?>
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val retVal = method.invoke(delegate, *parameters, Continuation<Any?>(EmptyCoroutineContext) {
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val continuationResult = it.getOrNull()
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continuation.resume(continuationResult)
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})
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retVal
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} else {
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method.invoke(delegate, *arguments)
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}
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}
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}
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fun testCacheSimple() = runBlocking {
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val delegate = object:Adder {
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override suspend fun add(a:Int, b:Int):Int {
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println("delay 1")
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delay(1000)
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println("delay 2")
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delay(1000)
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println("delay 3")
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delay(1000)
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return a + b
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}
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override fun addSync(a:Int, b:Int):Int {
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return a + b
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}
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}
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val adder = Proxy.newProxyInstance(
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Adder::class.java.classLoader,
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arrayOf(Adder::class.java),
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SuspendHandler(delegate)
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) as Adder
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println("starting")
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val result = adder.add(1,3)
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println("done 1")
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val result2 = adder.addSync(1,3)
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println("done 2")
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println(result)
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println(result2)
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}
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}
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