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CompletableFutureContinuation.kt
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CompletableFutureContinuation.kt
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/*
* Copyright 2017-2020 original authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.micronaut.aop.util
import io.micronaut.core.annotation.Experimental
import io.micronaut.core.annotation.Internal
import java.util.concurrent.CompletableFuture
import kotlin.coroutines.Continuation
import kotlin.coroutines.CoroutineContext
import kotlin.coroutines.jvm.internal.CoroutineStackFrame
/**
* Continuation represented as CompletableFuture
*
* @author Denis Stepanov
* @since 2.1.0
*/
@Internal
@Experimental
class CompletableFutureContinuation(private val continuation: Continuation<Any>) : Continuation<Any>, CoroutineStackFrame {
var completableFuture = CompletableFuture<Any>()
override val callerFrame: CoroutineStackFrame?
get() = continuation as? CoroutineStackFrame
override fun getStackTraceElement(): StackTraceElement? = null
override val context: CoroutineContext
get() = continuation.context
override fun resumeWith(result: Result<Any>) {
if (result.isSuccess) {
completableFuture.complete(result.getOrNull())
} else {
completableFuture.completeExceptionally(result.exceptionOrNull())
}
}
companion object {
fun completeSuccess(continuation: Continuation<Any>, result: Any) {
continuation.resumeWith(Result.success(result))
}
fun completeExceptionally(continuation: Continuation<Any>, exception: Throwable) {
continuation.resumeWith(Result.failure(exception))
}
}
}