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Merge pull request #563 from kenfinnigan/broadcast-emitter
Fixes #471
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33 changes: 33 additions & 0 deletions
33
...provider/src/main/java/io/smallrye/reactive/messaging/extension/EmitterConfiguration.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| package io.smallrye.reactive.messaging.extension; | ||
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| import org.eclipse.microprofile.reactive.messaging.OnOverflow; | ||
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| import io.smallrye.reactive.messaging.annotations.Broadcast; | ||
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| public class EmitterConfiguration { | ||
| public final String name; | ||
| public final OnOverflow.Strategy overflowBufferStrategy; | ||
| public final long overflowBufferSize; | ||
| public final Boolean broadcast; | ||
| public final int numberOfSubscriberBeforeConnecting; | ||
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| public EmitterConfiguration(String name, OnOverflow onOverflow, Broadcast broadcast) { | ||
| this.name = name; | ||
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| if (onOverflow != null) { | ||
| this.overflowBufferStrategy = onOverflow.value(); | ||
| this.overflowBufferSize = onOverflow.bufferSize(); | ||
| } else { | ||
| this.overflowBufferStrategy = null; | ||
| this.overflowBufferSize = -1; | ||
| } | ||
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| if (broadcast != null) { | ||
| this.broadcast = Boolean.TRUE; | ||
| this.numberOfSubscriberBeforeConnecting = broadcast.value(); | ||
| } else { | ||
| this.broadcast = Boolean.FALSE; | ||
| this.numberOfSubscriberBeforeConnecting = -1; | ||
| } | ||
| } | ||
| } |
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36 changes: 36 additions & 0 deletions
36
...saging-provider/src/main/java/io/smallrye/reactive/messaging/helpers/BroadcastHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package io.smallrye.reactive.messaging.helpers; | ||
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| import org.eclipse.microprofile.reactive.messaging.Message; | ||
| import org.eclipse.microprofile.reactive.streams.operators.PublisherBuilder; | ||
| import org.eclipse.microprofile.reactive.streams.operators.ReactiveStreams; | ||
| import org.reactivestreams.Publisher; | ||
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| import io.smallrye.mutiny.Multi; | ||
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| public class BroadcastHelper { | ||
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| private BroadcastHelper() { | ||
| // Avoid direct instantiation. | ||
| } | ||
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| /** | ||
| * <p> | ||
| * Wraps an existing {@code Publisher} for broadcasting. | ||
| * </p> | ||
| * | ||
| * @param publisher The publisher to be wrapped | ||
| * @param numberOfSubscriberBeforeConnecting Number of subscribers that must be present before broadcast occurs. | ||
| * A value of 0 means any number of subscribers will trigger the broadcast. | ||
| * @return The wrapped {@code Publisher} in a new {@code PublisherBuilder} | ||
| */ | ||
| public static PublisherBuilder<? extends Message<?>> broadcastPublisher(Publisher<? extends Message<?>> publisher, | ||
| int numberOfSubscriberBeforeConnecting) { | ||
| Multi<? extends Message<?>> broadcastPublisher = Multi.createFrom().publisher(publisher); | ||
| if (numberOfSubscriberBeforeConnecting != 0) { | ||
| return ReactiveStreams.fromPublisher(broadcastPublisher | ||
| .broadcast().toAtLeast(numberOfSubscriberBeforeConnecting)); | ||
| } else { | ||
| return ReactiveStreams.fromPublisher(broadcastPublisher.broadcast().toAllSubscribers()); | ||
| } | ||
| } | ||
| } |
40 changes: 40 additions & 0 deletions
40
...provider/src/test/java/io/smallrye/reactive/messaging/broadcast/BeanEmitterBroadcast.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,40 @@ | ||
| package io.smallrye.reactive.messaging.broadcast; | ||
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| import java.util.List; | ||
| import java.util.concurrent.CopyOnWriteArrayList; | ||
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| import javax.enterprise.context.ApplicationScoped; | ||
| import javax.inject.Inject; | ||
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| import org.eclipse.microprofile.reactive.messaging.Channel; | ||
| import org.eclipse.microprofile.reactive.messaging.Emitter; | ||
| import org.eclipse.microprofile.reactive.messaging.Incoming; | ||
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| import io.smallrye.reactive.messaging.annotations.Broadcast; | ||
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| @ApplicationScoped | ||
| public class BeanEmitterBroadcast { | ||
| @Inject | ||
| @Broadcast | ||
| @Channel("X") | ||
| Emitter<String> emitter; | ||
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| private final List<String> list = new CopyOnWriteArrayList<>(); | ||
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| public Emitter<String> emitter() { | ||
| return emitter; | ||
| } | ||
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| public List<String> list() { | ||
| return list; | ||
| } | ||
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| @Incoming("X") | ||
| public void consume(final String s) { | ||
| list.add(s); | ||
| } | ||
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| public void send(String s) { | ||
| emitter.send(s); | ||
| } | ||
| } |
22 changes: 22 additions & 0 deletions
22
...-provider/src/test/java/io/smallrye/reactive/messaging/broadcast/BeanEmitterConsumer.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| package io.smallrye.reactive.messaging.broadcast; | ||
|
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| import java.util.List; | ||
| import java.util.concurrent.CopyOnWriteArrayList; | ||
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| import javax.enterprise.context.ApplicationScoped; | ||
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| import org.eclipse.microprofile.reactive.messaging.Incoming; | ||
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| @ApplicationScoped | ||
| public class BeanEmitterConsumer { | ||
| private final List<String> list = new CopyOnWriteArrayList<>(); | ||
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| public List<String> list() { | ||
| return list; | ||
| } | ||
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| @Incoming("X") | ||
| public void consume(final String s) { | ||
| list.add(s); | ||
| } | ||
| } |
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