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.storage.plugin.jdbc.common.dao;
  
  import com.google.common.base.Strings;
  import lombok.RequiredArgsConstructor;
  import lombok.SneakyThrows;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.oap.server.core.Const;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.alarm.AlarmRecord;
  import org.apache.skywalking.oap.server.core.analysis.manual.searchtag.Tag;
  import org.apache.skywalking.oap.server.core.config.ConfigService;
  import org.apache.skywalking.oap.server.core.query.enumeration.Scope;
  import org.apache.skywalking.oap.server.core.query.input.Duration;
  import org.apache.skywalking.oap.server.core.query.type.AlarmMessage;
  import org.apache.skywalking.oap.server.core.query.type.Alarms;
  import org.apache.skywalking.oap.server.core.storage.query.IAlarmQueryDAO;
  import org.apache.skywalking.oap.server.library.client.jdbc.hikaricp.JDBCClient;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.util.CollectionUtils;
  import org.apache.skywalking.oap.server.storage.plugin.jdbc.common.JDBCTableInstaller;
  import org.apache.skywalking.oap.server.storage.plugin.jdbc.common.SQLAndParameters;
  import org.apache.skywalking.oap.server.storage.plugin.jdbc.common.TableHelper;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Objects;
  import java.util.Set;
  
  import static java.util.Comparator.comparing;
  import static java.util.Objects.nonNull;
  import static java.util.function.Predicate.not;
  import static java.util.stream.Collectors.toList;
  import static java.util.stream.Collectors.toSet;
  
  @Slf4j
  @RequiredArgsConstructor
  public class JDBCAlarmQueryDAO implements IAlarmQueryDAO {
      protected final JDBCClient jdbcClient;
      protected final ModuleManager manager;
      protected final TableHelper tableHelper;
  
      private Set<String> searchableTagKeys;
  
      @Override
      @SneakyThrows
      public Alarms getAlarm(Integer scopeId, String keyword, int limit, int from,
                             Duration duration, final List<Tag> tags) {
          if (searchableTagKeys == null) {
              final ConfigService configService = manager.find(CoreModule.NAME)
                                                         .provider()
                                                         .getService(ConfigService.class);
              searchableTagKeys = new HashSet<>(Arrays.asList(configService.getSearchableAlarmTags().split(Const.COMMA)));
          }
          // If the tag is not searchable, but is required, then we don't need to run the real query.
          if (tags != null && !searchableTagKeys.containsAll(tags.stream().map(Tag::getKey).collect(toSet()))) {
              log.warn(
                  "Searching tags that are not searchable: {}",
                  tags.stream().map(Tag::getKey).filter(not(searchableTagKeys::contains)).collect(toSet()));
              return new Alarms();
          }
  
          final var tables = tableHelper.getTablesForRead(
              AlarmRecord.INDEX_NAME, duration.getStartTimeBucket(), duration.getEndTimeBucket()
          );
          final var alarmMsgs = new ArrayList<AlarmMessage>();
  
          for (final var table : tables) {
              final var sqlAndParameters = buildSQL(scopeId, keyword, limit, from, duration, tags, table);
              jdbcClient.executeQuery(sqlAndParameters.sql(), resultSet -> {
                  while (resultSet.next()) {
                      final var message = new AlarmMessage();
                      message.setId(resultSet.getString(AlarmRecord.ID0));
                      message.setId1(resultSet.getString(AlarmRecord.ID1));
                      message.setMessage(resultSet.getString(AlarmRecord.ALARM_MESSAGE));
                      message.setStartTime(resultSet.getLong(AlarmRecord.START_TIME));
                      message.setScope(Scope.Finder.valueOf(resultSet.getInt(AlarmRecord.SCOPE)));
                      message.setScopeId(resultSet.getInt(AlarmRecord.SCOPE));
                      String dataBinaryBase64 = resultSet.getString(AlarmRecord.TAGS_RAW_DATA);
                      if (!Strings.isNullOrEmpty(dataBinaryBase64)) {
                          parserDataBinaryBase64(dataBinaryBase64, message.getTags());
                      }
                      alarmMsgs.add(message);
                  }
                  return null;
              }, sqlAndParameters.parameters());
          }
          return new Alarms(
              alarmMsgs
                  .stream()
                  .sorted(comparing(AlarmMessage::getStartTime).reversed())
                  .skip(from)
                  .limit(limit)
                  .collect(toList())
          );
      }
  
      protected SQLAndParameters buildSQL(Integer scopeId, String keyword, int limit, int from,
                                          Duration duration, List<Tag> tags, String table) {
          final var sql = new StringBuilder();
          final var parameters = new ArrayList<>();
  
          long startTB = 0;
          long endTB = 0;
          if (nonNull(duration)) {
              startTB = duration.getStartTimeBucketInSec();
              endTB = duration.getEndTimeBucketInSec();
          }
          sql.append("select * from ").append(table);
          /*
           * This is an AdditionalEntity feature, see:
           * {@link org.apache.skywalking.oap.server.core.storage.annotation.SQLDatabase.AdditionalEntity}
           */
          final var timeBucket = TableHelper.getTimeBucket(table);
          final var tagTable = TableHelper.getTable(AlarmRecord.ADDITIONAL_TAG_TABLE, timeBucket);
          if (!CollectionUtils.isEmpty(tags)) {
              for (int i = 0; i < tags.size(); i++) {
                  sql.append(" inner join ").append(tagTable).append(" ");
                  sql.append(tagTable + i);
                  sql.append(" on ").append(table).append(".").append(JDBCTableInstaller.ID_COLUMN).append(" = ");
                  sql.append(tagTable + i).append(".").append(JDBCTableInstaller.ID_COLUMN);
              }
          }
          sql.append(" where ")
             .append(table).append(".").append(JDBCTableInstaller.TABLE_COLUMN).append(" = ? ");
          parameters.add(AlarmRecord.INDEX_NAME);
          if (Objects.nonNull(scopeId)) {
              sql.append(" and ").append(AlarmRecord.SCOPE).append(" = ?");
              parameters.add(scopeId);
          }
          if (startTB != 0 && endTB != 0) {
              sql.append(" and ").append(table).append(".").append(AlarmRecord.TIME_BUCKET).append(" >= ?");
              parameters.add(startTB);
              sql.append(" and ").append(table).append(".").append(AlarmRecord.TIME_BUCKET).append(" <= ?");
              parameters.add(endTB);
          }
  
          if (!Strings.isNullOrEmpty(keyword)) {
              sql.append(" and ").append(AlarmRecord.ALARM_MESSAGE).append(" like concat('%',?,'%') ");
              parameters.add(keyword);
          }
          if (CollectionUtils.isNotEmpty(tags)) {
              for (int i = 0; i < tags.size(); i++) {
                  sql.append(" and ").append(tagTable + i).append(".");
                  sql.append(AlarmRecord.TAGS).append(" = ?");
                  parameters.add(tags.get(i).toString());
              }
          }
          sql.append(" order by ").append(AlarmRecord.START_TIME).append(" desc ");
          sql.append(" limit ").append(from + limit);
  
          return new SQLAndParameters(sql.toString(), parameters);
      }
  }
  