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Propagate Reactor's context in tracing publisher (#16)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| plugins { | ||
| alias libs.plugins.kotlinjvm | ||
| alias libs.plugins.kotlinkapt | ||
| } | ||
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| dependencies { | ||
| api project(':tracing-core') | ||
| api mn.micronaut.http.client | ||
| api mn.micronaut.runtime | ||
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| api libs.kotlinx.coroutines.core | ||
| api libs.kotlinx.coroutines.reactor | ||
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| kaptTest mn.micronaut.inject.java | ||
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| testImplementation libs.kotlinx.coroutines.core | ||
| testImplementation libs.kotlinx.coroutines.reactor | ||
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| testImplementation mn.micronaut.http.server.netty | ||
| testImplementation mn.micronaut.test.junit5 | ||
| testImplementation 'org.junit.jupiter:junit-jupiter-engine' | ||
| } | ||
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| tasks.named("compileTestKotlin") { | ||
| kotlinOptions.jvmTarget = "1.8" | ||
| } | ||
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| tasks.named("test") { | ||
| useJUnitPlatform() | ||
| } |
149 changes: 149 additions & 0 deletions
149
tests/kotlin-tests/src/test/kotlin/reactor/ReactorContextPropagationSpec.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package reactor | ||
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| import io.micronaut.context.ApplicationContext | ||
| import io.micronaut.context.annotation.Requires | ||
| import io.micronaut.core.annotation.Introspected | ||
| import io.micronaut.http.HttpRequest | ||
| import io.micronaut.http.MutableHttpResponse | ||
| import io.micronaut.http.annotation.* | ||
| import io.micronaut.http.client.HttpClient | ||
| import io.micronaut.http.filter.HttpServerFilter | ||
| import io.micronaut.http.filter.ServerFilterChain | ||
| import io.micronaut.runtime.server.EmbeddedServer | ||
| import jakarta.inject.Singleton | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.currentCoroutineContext | ||
| import kotlinx.coroutines.delay | ||
| import kotlinx.coroutines.flow.single | ||
| import kotlinx.coroutines.reactive.asFlow | ||
| import kotlinx.coroutines.reactor.ReactorContext | ||
| import kotlinx.coroutines.reactor.asCoroutineContext | ||
| import kotlinx.coroutines.reactor.mono | ||
| import kotlinx.coroutines.withContext | ||
| import org.junit.jupiter.api.Test | ||
| import org.reactivestreams.Publisher | ||
| import reactor.core.publisher.Flux | ||
| import reactor.core.publisher.Mono | ||
| import reactor.util.context.Context | ||
| import reactor.util.function.Tuple2 | ||
| import reactor.util.function.Tuples | ||
| import java.util.* | ||
|
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| class ReactorContextPropagationSpec { | ||
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| @Test | ||
| fun testKotlinPropagation() { | ||
| val embeddedServer = ApplicationContext.run(EmbeddedServer::class.java, | ||
| mapOf("reactortestpropagation.enabled" to "true", "micronaut.http.client.read-timeout" to "30s") | ||
| ) | ||
| val client = embeddedServer.applicationContext.getBean(HttpClient::class.java) | ||
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| val result: MutableList<Tuple2<String, String>> = Flux.range(1, 100) | ||
| .flatMap { | ||
| val tracingId = UUID.randomUUID().toString() | ||
| val get = HttpRequest.POST<Any>("http://localhost:${embeddedServer.port}/trigger", NameRequestBody("sss-" + tracingId)).header("X-TrackingId", tracingId) | ||
| Mono.from(client.retrieve(get, String::class.java)) | ||
| .map { Tuples.of(it as String, tracingId) } | ||
| } | ||
| .collectList() | ||
| .block() | ||
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| for (t in result) { | ||
| assert(t.t1 == t.t2) | ||
| } | ||
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| embeddedServer.stop() | ||
| } | ||
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| } | ||
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| @Requires(property = "reactortestpropagation.enabled") | ||
| @Controller | ||
| class TestController(private val someService: SomeService) { | ||
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| @Post("/trigger") | ||
| suspend fun trigger(request: HttpRequest<*>, @Body requestBody: SomeBody): String { | ||
| return withContext(Dispatchers.IO) { | ||
| someService.findValue() | ||
| } | ||
| } | ||
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| @Get("/data") | ||
| suspend fun getTracingId(request: HttpRequest<*>): String { | ||
| val reactorContextView = currentCoroutineContext()[ReactorContext.Key]!!.context | ||
| return reactorContextView.get("reactorTrackingId") as String | ||
| } | ||
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| } | ||
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| @Introspected | ||
| class SomeBody(val name: String) | ||
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| @Requires(property = "reactortestpropagation.enabled") | ||
| @Singleton | ||
| class SomeService { | ||
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| suspend fun findValue(): String { | ||
| delay(50) | ||
| return withContext(Dispatchers.Default) { | ||
| delay(50) | ||
| val context = currentCoroutineContext()[ReactorContext.Key]!!.context | ||
| val reactorTrackingId = context.get("reactorTrackingId") as String | ||
| val suspendTrackingId = context.get("suspendTrackingId") as String | ||
| if (reactorTrackingId != suspendTrackingId) { | ||
| throw IllegalArgumentException() | ||
| } | ||
| suspendTrackingId | ||
| } | ||
| } | ||
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| } | ||
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| @Requires(property = "reactortestpropagation.enabled") | ||
| @Filter(Filter.MATCH_ALL_PATTERN) | ||
| class ReactorHttpServerFilter : HttpServerFilter { | ||
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| override fun doFilter(request: HttpRequest<*>, chain: ServerFilterChain): Publisher<MutableHttpResponse<*>> { | ||
| val trackingId = request.headers["X-TrackingId"] as String | ||
| return Mono.from(chain.proceed(request)).contextWrite { | ||
| it.put("reactorTrackingId", trackingId) | ||
| } | ||
| } | ||
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| override fun getOrder(): Int = 1 | ||
| } | ||
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| @Requires(property = "reactortestpropagation.enabled") | ||
| @Filter(Filter.MATCH_ALL_PATTERN) | ||
| class SuspendHttpServerFilter : CoroutineHttpServerFilter { | ||
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| override suspend fun filter(request: HttpRequest<*>, chain: ServerFilterChain): MutableHttpResponse<*> { | ||
| val trackingId = request.headers["X-TrackingId"] as String | ||
| //withContext does not merge the current context so data may be lost | ||
| return withContext(Context.of("suspendTrackingId", trackingId).asCoroutineContext()) { | ||
| chain.next(request) | ||
| } | ||
| } | ||
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| override fun getOrder(): Int = 0 | ||
| } | ||
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| interface CoroutineHttpServerFilter : HttpServerFilter { | ||
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| suspend fun filter(request: HttpRequest<*>, chain: ServerFilterChain): MutableHttpResponse<*> | ||
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| override fun doFilter(request: HttpRequest<*>, chain: ServerFilterChain): Publisher<MutableHttpResponse<*>> { | ||
| return mono { | ||
| filter(request, chain) | ||
| } | ||
| } | ||
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| } | ||
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| suspend fun ServerFilterChain.next(request: HttpRequest<*>): MutableHttpResponse<*> { | ||
| return this.proceed(request).asFlow().single() | ||
| } | ||
|
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| @Introspected | ||
| class NameRequestBody(val name: String) |
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