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Reactor Kotlin Extensions

Add various extensions and adapters for Kotlin programming language. While Reactor Core, Reactor Addons and other Reactor libraries are designed to be Kotlin friendly with the use of @Nullable and carefully picked signature types, Kotlin developers might want to adapt the core functional programming API further.

Maven Artifacts

With Gradle from repo.spring.io or Maven Central repositories (stable releases only):

    repositories {
        //maven { url 'https://repo.spring.io/snapshot' }
        maven { url 'https://repo.spring.io/milestone' }
        mavenCentral()
    }

    dependencies {
        //implementation "io.projectreactor.kotlin:reactor-kotlin-extensions:1.2.0-SNAPSHOT"
        implementation "io.projectreactor.kotlin:reactor-kotlin-extensions:1.2.0-M3"
    }

With Maven from Maven Central repositories (stable releases):

<dependency>
    <groupId>io.projectreactor.kotlin</groupId>
    <artifactId>reactor-kotlin-extensions</artifactId>
    <version>1.1.6</version>
</dependency>

Or from repo.spring.io with access to SNAPSHOT:

...
<dependencies>

    <dependency>
        <groupId>io.projectreactor.kotlin</groupId>
        <artifactId>reactor-kotlin-extensions</artifactId>
        <version>1.2.0-M3</version>
    </dependency>

</dependencies>
...
<repositories>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
    </repository>
    <repository>
        <id>spring-snapshots</id>
        <name>Spring Snapshots</name>
        <url>https://repo.spring.io/snapshot</url>
        <snapshots>
            <enabled>true</enabled>
        </snapshots>
    </repository>
</repositories>

Quick Examples

Tuple destructure:

val (t1, t2, t3) = Tuples.of(O1, O2, O3)
assertEquals(t1, O1)
assertEquals(t2, O2)
assertEquals(t3, O3)

Convert, sum (requires reactor-extra) and test (requires reactor-test):

intArrayOf(2_000_000_000, 200_000_000) //sum overflows an Int
    .toFlux()
    .sum()
    .test()
    .expectNext(2_200_000_000)
    .verifyComplete()

Coordinating when two mono completes:

whenComplete("foo1".toMono(), "foo2".toMono())
    .test()
    .verifyComplete()

License

Reactor is Apache 2.0 licensed.