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.activemq.artemis.tests.integration;
  
  import java.lang.invoke.MethodHandles;
  import java.util.ArrayList;
  import java.util.List;
  
  import org.apache.activemq.artemis.api.core.management.NotificationType;
  import org.apache.activemq.artemis.core.server.management.Notification;
  import org.apache.activemq.artemis.core.server.management.NotificationListener;
  import org.apache.activemq.artemis.core.server.management.NotificationService;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class SimpleNotificationService implements NotificationService {
  
     private static final Logger logger = LoggerFactory.getLogger(MethodHandles.lookup().lookupClass());
  
     private final List<NotificationListener> listeners = new ArrayList<>();
  
  
     // NotificationService implementation ----------------------------
  
     @Override
     public void addNotificationListener(final NotificationListener listener) {
        listeners.add(listener);
     }
  
     @Override
     public void enableNotifications(final boolean enable) {
     }
  
     @Override
     public void removeNotificationListener(final NotificationListener listener) {
        listeners.remove(listener);
     }
  
     @Override
     public void sendNotification(final Notification notification) throws Exception {
        for (NotificationListener listener : listeners) {
           listener.onNotification(notification);
        }
     }
  
  
     public static class Listener implements NotificationListener {
  
        public synchronized int count(NotificationType... interestingTypes) {
           if (logger.isDebugEnabled()) {
              logger.debug("count for {}", stringOf(interestingTypes));
           }
           return (int) notifications.stream().filter(n -> matchTypes(n, interestingTypes)).count();
        }
  
        private static String stringOf(NotificationType[] types) {
           StringBuilder sb = new StringBuilder();
           sb.append("types[" + types.length + "] = {");
           for (int i = 0; i < types.length; i++) {
              sb.append(types[i]);
              if (i + 1 < types.length) {
                 sb.append(",");
              }
           }
           sb.append("}");
           return sb.toString();
        }
  
        public synchronized int size() {
           return notifications.size();
        }
  
        private boolean matchTypes(Notification notification, NotificationType... interestingTypes) {
           logger.debug("matching {}", notification);
           for (NotificationType t : interestingTypes) {
              logger.debug("looking to match {} with type parameter {}", notification, t);
              if (notification.getType() == t) {
                 return true;
              }
           }
           return false;
        }
  
        public synchronized Notification findAny(NotificationType notificationType) {
           return notifications.stream().filter(n -> n.getType() == notificationType).findAny().get();
        }
  
        ////////////////////////////////////////////////////////////////////////////////////
        // Note: Do not expose this collection directly.
        // Instead, filter notifications by the types you are interested in.
        // Previous tests validated whether this collection was empty, but later, new notifications were added.
        // These tests became flaky as they received irrelevant notifications.
        private final List<Notification> notifications = new ArrayList<>();
  
        @Override
        public synchronized void onNotification(final Notification notification) {
           notifications.add(notification);
        }
  
     }
  }
  