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Support @Scheduled fixedDelay/fixedRate on Publisher-returning methods

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This commit adds support for `@Scheduled` annotation on reactive
methods and Kotlin suspending functions.

Reactive methods are methods that return a `Publisher` or a subclass
of `Publisher`. The `ReactiveAdapterRegistry` is used to support many
implementations, such as `Flux`, `Mono`, `Flow`, `Single`, etc.
Methods should not take any argument and published values will be
ignored, as they are already with synchronous support.

This is implemented in `ScheduledAnnotationReactiveSupport`, which
"converts" Publishers to `Runnable`. This strategy keeps track of
active Subscriptions in the `ScheduledAnnotationBeanPostProcessor`,
in order to cancel them all in case of shutdown.
The existing scheduling support for tasks is reused, aligning the
triggering behavior with the existing support: cron, fixedDelay and
fixedRate are all supported strategies.

If the `Publisher` errors, the exception is logged at warn level and
otherwise ignored. As a result new `Runnable` instances will be
created for each execution and scheduling will continue.
The only difference with synchronous support is that error signals
will not be thrown by those `Runnable` tasks and will not be made
available to the `org.springframework.util.ErrorHandler` contract.
This is due to the asynchronous and lazy nature of Publishers.

Closes gh-23533
Closes gh-28515
This commit is contained in:
Simon Baslé
2023-06-05 12:25:15 +02:00
committed by Brian Clozel
parent 53f891226e
commit 35052f2113
7 changed files with 877 additions and 4 deletions
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3
spring-context/spring-context.gradle
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@@ -27,6 +27,7 @@ dependencies {
optional("org.jetbrains.kotlin:kotlin-reflect")
optional("org.jetbrains.kotlin:kotlin-stdlib")
optional("org.reactivestreams:reactive-streams")
optional("io.projectreactor:reactor-core")
testImplementation(project(":spring-core-test"))
testImplementation(testFixtures(project(":spring-aop")))
testImplementation(testFixtures(project(":spring-beans")))
@@ -38,6 +39,8 @@ dependencies {
testImplementation("org.awaitility:awaitility")
testImplementation("jakarta.inject:jakarta.inject-tck")
testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-core")
testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-reactor")
testImplementation("io.reactivex.rxjava3:rxjava")
testRuntimeOnly("jakarta.xml.bind:jakarta.xml.bind-api")
testRuntimeOnly("org.glassfish:jakarta.el")
// Substitute for javax.management:jmxremote_optional:1.0.1_04 (not available on Maven Central)