001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.juneau.rest.server.arg;
018
019import static org.apache.juneau.commons.utils.Shorts.*;
020
021import java.util.*;
022
023import org.apache.juneau.commons.reflect.*;
024import org.apache.juneau.rest.server.sse.*;
025
026/**
027 * Resolves {@link SseSubscription} method parameters.
028 */
029@SuppressWarnings({
030   "resource" // Subscription is caller-owned and closed by SSE response handling.
031})
032public class SseSubscriptionArg extends SimpleRestOperationArg {
033
034   /**
035    * Static creator.
036    *
037    * @param paramInfo The Java method parameter being resolved. Must not be <jk>null</jk>.
038    * @return A new arg, or {@code null} if not applicable.
039    */
040   public static SseSubscriptionArg create(ParameterInfo paramInfo) {
041      if (paramInfo.isType(SseSubscription.class))
042         return new SseSubscriptionArg();
043      return null;
044   }
045
046   /**
047    * Constructor.
048    */
049   protected SseSubscriptionArg() {
050      super(opSession -> {
051         var broadcaster = opSession.getBeanStore().getBean(SseBroadcaster.class).orElseGet(() -> opSession.getBeanStore().add(SseBroadcaster.class, SseBroadcaster.create()));
052         var id = o(opSession.getRequest().getHttpServletRequest().getRequestId()).orElse(UUID.randomUUID().toString());
053         return broadcaster.subscribe(id);
054      });
055   }
056}