content: /*
   *  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.causeway.extensions.sse.applib.service;
  
  import java.util.UUID;
  import java.util.function.Predicate;
  
  import org.apache.causeway.extensions.sse.applib.annotations.SseSource;
  
  /**
   * Server-sent events.
   *
   * @see <a href="https://www.w3schools.com/html/html5_serversentevents.asp">www.w3schools.com</a>
   *
   * @since 2.0 {@index}
   */
  public interface SseChannel {
  
      UUID uuid();
      Class<?> sourceType();
  
      @Deprecated default UUID getId() { return uuid(); }
      @Deprecated default Class<?> getSourceType() { return sourceType(); }
  
      void listenWhile(Predicate<SseSource> listener);
  
      void fire(SseSource source);
  
      void close();
  
      void awaitClose() throws InterruptedException;
  
  }
  