code: /*
   * 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.skywalking.oap.server.core.query;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.apache.skywalking.oap.server.core.analysis.manual.searchtag.Tag;
  import org.apache.skywalking.oap.server.core.query.input.Duration;
  import org.apache.skywalking.oap.server.core.query.type.Alarms;
  import org.apache.skywalking.oap.server.core.query.type.Pagination;
  import org.apache.skywalking.oap.server.core.storage.StorageModule;
  import org.apache.skywalking.oap.server.core.storage.query.IAlarmQueryDAO;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.module.Service;
  
  public class AlarmQueryService implements Service {
  
      private final ModuleManager moduleManager;
      private IAlarmQueryDAO alarmQueryDAO;
  
      public AlarmQueryService(ModuleManager moduleManager) {
          this.moduleManager = moduleManager;
      }
  
      private IAlarmQueryDAO getAlarmQueryDAO() {
          if (alarmQueryDAO == null) {
              alarmQueryDAO = moduleManager.find(StorageModule.NAME).provider().getService(IAlarmQueryDAO.class);
          }
          return alarmQueryDAO;
      }
  
      public Alarms getAlarm(final Integer scopeId, final String keyword, final Pagination paging,
                             final Duration duration, final List<Tag> tags) throws IOException {
          PaginationUtils.Page page = PaginationUtils.INSTANCE.exchange(paging);
          return getAlarmQueryDAO().getAlarm(scopeId, keyword, page.getLimit(), page.getFrom(), duration, tags);
      }
  }
  