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 com.alibaba.spring.context;
  
  import org.junit.Test;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.context.annotation.AnnotationConfigApplicationContext;
  import org.springframework.context.event.ApplicationContextEvent;
  
  import java.util.EventObject;
  import java.util.LinkedHashMap;
  import java.util.Map;
  import java.util.concurrent.atomic.AtomicInteger;
  
  import static org.junit.Assert.assertEquals;
  
  
  /**
   * {@link OnceApplicationContextEventListener} Test
   *
   * @see OnceApplicationContextEventListener
   * @since 1.0.6
   */
  public class OnceApplicationContextEventListenerTest {
  
      @Test
      public void test() {
  
          for (int levels = 1; levels < 100; levels++) {
              testOnceApplicationContextEventListener(levels, true);
              testOnceApplicationContextEventListener(levels, false);
          }
      }
  
      private void testOnceApplicationContextEventListener(int levels, boolean listenersAsBean) {
  
          ConfigurableApplicationContext context = createContext(levels, listenersAsBean);
  
          context.start();
  
          context.stop();
  
          context.close();
  
      }
  
      private ConfigurableApplicationContext createContext(int levels, boolean listenersAsBean) {
  
          if (levels < 1) {
              return null;
          }
  
          AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
  
          if (listenersAsBean) {
              context.register(MyContextEventListener.class);
          } else {
              context.addApplicationListener(new MyContextEventListener(context));
          }
  
          context.setParent(createContext(levels - 1, listenersAsBean));
  
          context.refresh();
  
          return context;
      }
  
      static class MyContextEventListener extends OnceApplicationContextEventListener {
  
          public MyContextEventListener() {
  
          }
  
          public MyContextEventListener(ApplicationContext applicationContext) {
              super(applicationContext);
          }
  
  
          private Map<EventObject, AtomicInteger> eventsHandledCount = new LinkedHashMap<EventObject, AtomicInteger>();
  
          @Override
          protected void onApplicationContextEvent(ApplicationContextEvent event) {
  
              assertEquals(getApplicationContext(), event.getApplicationContext());
  
              AtomicInteger count = eventsHandledCount.get(event);
  
              if (count == null) {
                  count = new AtomicInteger();
                  eventsHandledCount.put(event, count);
              }
  
              assertEquals(0, count.getAndIncrement());
          }
      }
  
  }
  