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.wicket.webmodule;
  
  import jakarta.inject.Inject;
  import jakarta.inject.Named;
  import jakarta.servlet.ServletContext;
  import jakarta.servlet.ServletContextListener;
  import jakarta.servlet.ServletException;
  
  import org.springframework.beans.factory.annotation.Qualifier;
  import org.springframework.stereotype.Service;
  
  import org.apache.causeway.applib.annotation.PriorityPrecedence;
  import org.apache.causeway.applib.services.inject.ServiceInjector;
  import org.apache.causeway.commons.collections.Can;
  import org.apache.causeway.core.webapp.modules.WebModuleAbstract;
  import org.apache.causeway.extensions.sse.wicket.CausewayModuleExtSseWicket;
  
  import lombok.Getter;
  
  /**
   * WebModule providing support for Server Sent Events.
   *
   * @since 2.0 {@index}
   */
  @Service
  @Named(WebModuleServerSentEvents.LOGICAL_TYPE_NAME)
  @Qualifier("ServerSentEvents")
  @jakarta.annotation.Priority(PriorityPrecedence.MIDPOINT)
  public final class WebModuleServerSentEvents extends WebModuleAbstract {
  
      public static final String LOGICAL_TYPE_NAME = CausewayModuleExtSseWicket.NAMESPACE + ".WebModuleServerSentEvents";
  
      private static final String SERVLET_NAME = "ServerSentEventsServlet";
  
      @Getter
      private final String name = "ServerSentEvents";
  
      @Inject
      public WebModuleServerSentEvents(ServiceInjector serviceInjector) {
          super(serviceInjector);
      }
  
      @Override
      public Can<ServletContextListener> init(ServletContext ctx) throws ServletException {
  
          registerServlet(ctx, SERVLET_NAME, ServerSentEventsServlet.class)
              .ifPresent(servletReg -> {
                  servletReg.setAsyncSupported(true);
                  servletReg.addMapping("/sse");
              });
  
          return Can.empty(); // registers no listeners
      }
  
  }
  