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.cloud.event;
  
  import java.text.SimpleDateFormat;
  import java.util.Date;
  import java.util.HashMap;
  import java.util.Map;
  
  import javax.annotation.PostConstruct;
  import javax.inject.Inject;
  
  import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
  import org.apache.cloudstack.framework.events.EventDistributor;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.springframework.beans.factory.NoSuchBeanDefinitionException;
  import org.springframework.stereotype.Component;
  
  import com.cloud.configuration.Config;
  import com.cloud.dc.DataCenterVO;
  import com.cloud.dc.HostPodVO;
  import com.cloud.dc.dao.DataCenterDao;
  import com.cloud.dc.dao.HostPodDao;
  import com.cloud.server.ManagementService;
  import com.cloud.utils.component.ComponentContext;
  
  @Component
  public class AlertGenerator {
  
      protected static Logger LOGGER = LogManager.getLogger(AlertGenerator.class);
      private static DataCenterDao s_dcDao;
      private static HostPodDao s_podDao;
      protected static ConfigurationDao s_configDao;
      protected static EventDistributor eventDistributor;
  
      @Inject
      DataCenterDao dcDao;
      @Inject
      HostPodDao podDao;
      @Inject
      ConfigurationDao configDao;
  
      public AlertGenerator() {
      }
  
      @PostConstruct
      void init() {
          s_dcDao = dcDao;
          s_podDao = podDao;
          s_configDao = configDao;
      }
  
      public static void publishAlertOnEventBus(String alertType, long dataCenterId, Long podId, String subject, String body) {
  
          String configKey = Config.PublishAlertEvent.key();
          String value = s_configDao.getValue(configKey);
          boolean configValue = Boolean.parseBoolean(value);
          if(!configValue)
              return;
          try {
              eventDistributor = ComponentContext.getComponent(EventDistributor.class);
          } catch (NoSuchBeanDefinitionException nbe) {
              return; // no provider is configured to provide events distributor, so just return
          }
  
          org.apache.cloudstack.framework.events.Event event =
              new org.apache.cloudstack.framework.events.Event(ManagementService.Name, EventCategory.ALERT_EVENT.getName(), alertType, null, null);
  
          Map<String, String> eventDescription = new HashMap<String, String>();
          DataCenterVO dc = s_dcDao.findById(dataCenterId);
          HostPodVO pod = s_podDao.findById(podId);
  
          eventDescription.put("event", alertType);
          if (dc != null) {
              eventDescription.put("dataCenterId", dc.getUuid());
          } else {
              eventDescription.put("dataCenterId", null);
          }
          if (pod != null) {
              eventDescription.put("podId", pod.getUuid());
          } else {
              eventDescription.put("podId", null);
          }
          eventDescription.put("subject", subject);
          eventDescription.put("body", body);
  
          String eventDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss Z").format(new Date());
          eventDescription.put("eventDateTime", eventDate);
  
          event.setDescription(eventDescription);
  
          eventDistributor.publish(event);
      }
  }
  