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AOP w połączeniu z Kotlin Coroutines | https://vived.io/aop-w-polaczeniu-z-kotlin-coroutines/
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| package com.example | |
| import kotlinx.coroutines.delay | |
| import kotlinx.coroutines.runBlocking | |
| import org.aspectj.lang.JoinPoint | |
| import org.aspectj.lang.ProceedingJoinPoint | |
| import org.aspectj.lang.annotation.AfterReturning | |
| import org.aspectj.lang.annotation.Around | |
| import org.aspectj.lang.annotation.Aspect | |
| import org.slf4j.LoggerFactory.getLogger | |
| import org.springframework.boot.CommandLineRunner | |
| import org.springframework.boot.autoconfigure.SpringBootApplication | |
| import org.springframework.boot.runApplication | |
| import org.springframework.stereotype.Component | |
| import reactor.core.publisher.Mono | |
| import kotlin.coroutines.Continuation | |
| import kotlin.coroutines.intrinsics.startCoroutineUninterceptedOrReturn | |
| import kotlin.coroutines.intrinsics.suspendCoroutineUninterceptedOrReturn | |
| @SpringBootApplication | |
| class Application | |
| fun main(args: Array<String>) { | |
| runApplication<Application>(*args) | |
| } | |
| @Component | |
| class Runner( | |
| val foo: Foo, | |
| val reactiveFoo: ReactiveFoo, | |
| val coroutineFoo: CoroutineFoo, | |
| ) : CommandLineRunner { | |
| override fun run(vararg args: String?) { | |
| foo.add(2, 3) | |
| reactiveFoo.add(2, 3).block() | |
| runBlocking { | |
| coroutineFoo.add(2, 3) | |
| } | |
| } | |
| } | |
| annotation class Logging | |
| annotation class ReactiveLogging | |
| annotation class CoroutineLogging | |
| @Component | |
| class Foo { | |
| @Logging | |
| fun add(a: Int, b: Int): Int = a + b | |
| } | |
| @Component | |
| @Aspect | |
| class LoggingAspect { | |
| private val logger = getLogger(LoggingAspect::class.java) | |
| @AfterReturning( | |
| pointcut = "@annotation(Logging)", | |
| returning = "result" | |
| ) | |
| fun logResult(joinPoint: JoinPoint, result: Any?) { | |
| logger.info("`${joinPoint.signature}` returned `${result}`") | |
| } | |
| } | |
| @Component | |
| class ReactiveFoo { | |
| @ReactiveLogging | |
| fun add(a: Int, b: Int): Mono<Int> = Mono.just(a + b) | |
| } | |
| @Component | |
| @Aspect | |
| class ReactiveLoggingAspect { | |
| private val logger = getLogger(ReactiveLoggingAspect::class.java) | |
| @Around( | |
| """ | |
| @annotation(ReactiveLogging) && | |
| execution(reactor.core.publisher.Mono *(..)) | |
| """ | |
| ) | |
| fun logResult(joinPoint: ProceedingJoinPoint): Mono<Any> = | |
| (joinPoint.proceed() as Mono<Any>) | |
| .doOnNext { result -> | |
| logger.info("`${joinPoint.signature}` returned `${result}`") | |
| } | |
| } | |
| @Component | |
| class CoroutineFoo { | |
| @CoroutineLogging | |
| suspend fun add(a: Int, b: Int): Int { | |
| delay(100) | |
| return a + b | |
| } | |
| } | |
| val ProceedingJoinPoint.coroutineContinuation: Continuation<Any?> | |
| get() = this.args.last() as Continuation<Any?> | |
| val ProceedingJoinPoint.coroutineArgs: Array<Any?> | |
| get() = this.args.sliceArray(0 until this.args.size - 1) | |
| suspend fun ProceedingJoinPoint.proceedCoroutine( | |
| args: Array<Any?> = this.coroutineArgs | |
| ): Any? = | |
| suspendCoroutineUninterceptedOrReturn { continuation -> | |
| this.proceed(args + continuation) | |
| } | |
| fun ProceedingJoinPoint.runCoroutine( | |
| block: suspend () -> Any? | |
| ): Any? = | |
| block.startCoroutineUninterceptedOrReturn(this.coroutineContinuation) | |
| @Component | |
| @Aspect | |
| class CoroutineLoggingAspect { | |
| private val logger = getLogger(CoroutineLoggingAspect::class.java) | |
| @Around( | |
| """ | |
| @annotation(CoroutineLogging) && | |
| args(.., kotlin.coroutines.Continuation) | |
| """ | |
| ) | |
| fun logResult(joinPoint: ProceedingJoinPoint): Any? = | |
| joinPoint.runCoroutine { | |
| val result = joinPoint.proceedCoroutine() | |
| logger.info("`${joinPoint.signature}` returned `${result}`") | |
| result | |
| } | |
| } |
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| plugins { | |
| id("org.springframework.boot") version "2.5.3" | |
| id("io.spring.dependency-management") version "1.0.11.RELEASE" | |
| kotlin("jvm") version "1.5.21" | |
| kotlin("plugin.spring") version "1.5.21" | |
| } | |
| repositories { | |
| mavenCentral() | |
| } | |
| dependencies { | |
| implementation("org.springframework.boot:spring-boot-starter-webflux") | |
| implementation("org.springframework.boot:spring-boot-starter-aop") | |
| implementation("io.projectreactor.kotlin:reactor-kotlin-extensions") | |
| implementation("org.jetbrains.kotlin:kotlin-reflect") | |
| implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8") | |
| implementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor") | |
| } |
Thank you so much!!
It works for me!
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@pjanczyk I tried using your code but it got into an infinite loop. Possible to check if I did any mistake. Using this for my project.
I put the annotation around a method that does an API call. In first call, you can see the actual args passed and then an API call is also made.but after that its just an infinite loop of null as args being passed along with Continuation object which is not printed.
Got these logs in infinite loop from below code::