31 lines
816 B
Markdown
31 lines
816 B
Markdown
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# queue
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Materialize a `SourceQueue` onto which elements can be pushed for emitting from the source.
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@ref[Source stages](../index.md#source-stages)
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@@@div { .group-scala }
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## Signature
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@@signature [Source.scala]($akka$/akka-stream/src/main/scala/akka/stream/scaladsl/Source.scala) { #queue }
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@@@
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## Description
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Materialize a `SourceQueue` onto which elements can be pushed for emitting from the source. The queue contains
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a buffer, if elements are pushed onto the queue faster than the source is consumed the overflow will be handled with
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a strategy specified by the user. Functionality for tracking when an element has been emitted is available through
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`SourceQueue.offer`.
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@@@div { .callout }
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**emits** when there is demand and the queue contains elements
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**completes** when downstream completes
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@@@
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