diff --git a/dev/com.ibm.ws.org.apache.cxf.cxf.rt.rs.sse.3.2/src/org/apache/cxf/jaxrs/sse/SseBroadcasterImpl.java b/dev/com.ibm.ws.org.apache.cxf.cxf.rt.rs.sse.3.2/src/org/apache/cxf/jaxrs/sse/SseBroadcasterImpl.java new file mode 100644 index 00000000000..38842540822 --- /dev/null +++ b/dev/com.ibm.ws.org.apache.cxf.cxf.rt.rs.sse.3.2/src/org/apache/cxf/jaxrs/sse/SseBroadcasterImpl.java @@ -0,0 +1,80 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ +package org.apache.cxf.jaxrs.sse; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.Set; +import java.util.concurrent.CompletableFuture; +import java.util.concurrent.CompletionStage; +import java.util.concurrent.CopyOnWriteArraySet; +import java.util.function.BiConsumer; +import java.util.function.Consumer; + +import javax.ws.rs.sse.OutboundSseEvent; +import javax.ws.rs.sse.SseBroadcaster; +import javax.ws.rs.sse.SseEventSink; + +public class SseBroadcasterImpl implements SseBroadcaster { + private final Set subscribers = new CopyOnWriteArraySet<>(); + + private final Set> closers = + new CopyOnWriteArraySet<>(); + + private final Set> exceptioners = + new CopyOnWriteArraySet<>(); + + @Override + public void register(SseEventSink sink) { + subscribers.add(sink); + } + + @Override + public CompletionStage broadcast(OutboundSseEvent event) { + final Collection> futures = new ArrayList<>(); + + for (SseEventSink sink: subscribers) { + try { + futures.add(sink.send(event).toCompletableFuture()); + } catch (final Exception ex) { + exceptioners.forEach(exceptioner -> exceptioner.accept(sink, ex)); + } + } + + return CompletableFuture.allOf(futures.toArray(new CompletableFuture[futures.size()])); + } + + @Override + public void onClose(Consumer subscriber) { + closers.add(subscriber); + } + + @Override + public void onError(BiConsumer exceptioner) { + exceptioners.add(exceptioner); + } + + @Override + public void close() { + subscribers.forEach(subscriber -> { + subscriber.close(); + closers.forEach(closer -> closer.accept(subscriber)); + }); + } +}