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.resource;
  
  import java.net.URI;
  import java.util.List;
  import java.util.Map;
  
  import com.cloud.host.Host;
  
  public interface ResourceListener {
      static final Integer EVENT_DISCOVER_BEFORE = 0x1;
      static final Integer EVENT_DISCOVER_AFTER = 0x1 << 1;
      static final Integer EVENT_DELETE_HOST_BEFORE = 0x1 << 2;
      static final Integer EVENT_DELETE_HOST_AFTER = 0x1 << 3;
      static final Integer EVENT_CANCEL_MAINTENANCE_BEFORE = 0x1 << 4;
      static final Integer EVENT_CANCEL_MAINTENANCE_AFTER = 0x1 << 5;
      static final Integer EVENT_PREPARE_MAINTENANCE_BEFORE = 0x1 << 6;
      static final Integer EVENT_PREPARE_MAINTENANCE_AFTER = 0x1 << 7;
      static final Integer EVENT_ALL = (EVENT_DISCOVER_BEFORE | EVENT_DISCOVER_AFTER | EVENT_DELETE_HOST_BEFORE | EVENT_DELETE_HOST_AFTER |
          EVENT_CANCEL_MAINTENANCE_BEFORE | EVENT_CANCEL_MAINTENANCE_AFTER | EVENT_PREPARE_MAINTENANCE_BEFORE | EVENT_PREPARE_MAINTENANCE_AFTER);
  
      /**
       *
       * @param dcid
       * @param podId
       * @param clusterId
       * @param uri
       * @param username
       * @param password
       * @param hostTags
       *
       * Called before Discover.find()
       */
      void processDiscoverEventBefore(Long dcid, Long podId, Long clusterId, URI uri, String username, String password, List<String> hostTags);
  
      /**
       *
       * @param resources
       *
       * Called after Discover.find()
       */
      void processDiscoverEventAfter(Map<? extends ServerResource, Map<String, String>> resources);
  
      /**
       *
       * @param host
       *
       * Called before host delete
       */
      void processDeleteHostEventBefore(Host host);
  
      /**
       *
       * @param host
       *
       * Called after host delete. NOTE param host includes stale data which has been removed from database
       */
      void processDeletHostEventAfter(Host host);
  
      /**
       *
       * @param hostId
       *
       * Called before AgentManager.cancelMaintenance
       */
      void processCancelMaintenaceEventBefore(Long hostId);
  
      /**
       *
       * @param hostId
       *
       * Called after AgentManager.cancelMaintenance
       */
      void processCancelMaintenaceEventAfter(Long hostId);
  
      /**
       *
       * @param hostId
       *
       * Called before AgentManager.main
       */
      void processPrepareMaintenaceEventBefore(Long hostId);
  
      /**
       *
       * @param hostId
       *
       * Called after AgentManager.main
       */
      void processPrepareMaintenaceEventAfter(Long hostId);
  }
  