# Module kotlinx-coroutines-reactive Utilities for [Reactive Streams](https://www.reactive-streams.org). Coroutine builders: | **Name** | **Result** | **Scope** | **Description** | --------------- | ----------------------------- | ---------------- | --------------- | [publish] | `Publisher` | [ProducerScope] | Cold reactive publisher that starts coroutine on subscribe Suspending extension functions and suspending iteration: | **Name** | **Description** | -------- | --------------- | [Publisher.awaitFirst][org.reactivestreams.Publisher.awaitFirst] | Returns the first value from the given publisher | [Publisher.awaitFirstOrDefault][org.reactivestreams.Publisher.awaitFirstOrDefault] | Returns the first value from the given publisher or default | [Publisher.awaitFirstOrElse][org.reactivestreams.Publisher.awaitFirstOrElse] | Returns the first value from the given publisher or default from a function | [Publisher.awaitFirstOrNull][org.reactivestreams.Publisher.awaitFirstOrNull] | Returns the first value from the given publisher or null | [Publisher.awaitLast][org.reactivestreams.Publisher.awaitFirst] | Returns the last value from the given publisher | [Publisher.awaitSingle][org.reactivestreams.Publisher.awaitSingle] | Returns the single value from the given publisher | [Publisher.openSubscription][org.reactivestreams.Publisher.openSubscription] | Subscribes to publisher and returns [ReceiveChannel] Conversion functions: | **Name** | **Description** | -------- | --------------- | [ReceiveChannel.asPublisher][kotlinx.coroutines.channels.ReceiveChannel.asPublisher] | Converts streaming channel to hot publisher [ProducerScope]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.channels/-producer-scope/index.html [ReceiveChannel]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.channels/-receive-channel/index.html [publish]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/publish.html [org.reactivestreams.Publisher.awaitFirst]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/await-first.html [org.reactivestreams.Publisher.awaitFirstOrDefault]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/await-first-or-default.html [org.reactivestreams.Publisher.awaitFirstOrElse]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/await-first-or-else.html [org.reactivestreams.Publisher.awaitFirstOrNull]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/await-first-or-null.html [org.reactivestreams.Publisher.awaitSingle]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/await-single.html [org.reactivestreams.Publisher.openSubscription]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/org.reactivestreams.-publisher/open-subscription.html [kotlinx.coroutines.channels.ReceiveChannel.asPublisher]: https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-reactive/kotlinx.coroutines.reactive/kotlinx.coroutines.channels.-receive-channel/as-publisher.html # Package kotlinx.coroutines.reactive Utilities for [Reactive Streams](https://www.reactive-streams.org).