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 java.util.stream.Collectors;
  import org.apache.skywalking.oap.server.core.query.input.Duration;
  import org.apache.skywalking.oap.server.library.util.StringUtil;
  import org.apache.skywalking.oap.server.core.analysis.IDManager;
  import org.apache.skywalking.oap.server.core.analysis.manual.searchtag.Tag;
  import org.apache.skywalking.oap.server.core.query.enumeration.Order;
  import org.apache.skywalking.oap.server.core.query.input.TraceScopeCondition;
  import org.apache.skywalking.oap.server.core.query.type.Logs;
  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.ILogQueryDAO;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.module.Service;
  
  import static java.util.Objects.nonNull;
  
  public class LogQueryService implements Service {
  
      private final ModuleManager moduleManager;
      private ILogQueryDAO logQueryDAO;
  
      public LogQueryService(ModuleManager moduleManager) {
          this.moduleManager = moduleManager;
      }
  
      private ILogQueryDAO getLogQueryDAO() {
          if (logQueryDAO == null) {
              this.logQueryDAO = moduleManager.find(StorageModule.NAME).provider().getService(ILogQueryDAO.class);
          }
          return logQueryDAO;
      }
  
      public boolean supportQueryLogsByKeywords() {
          return getLogQueryDAO().supportQueryLogsByKeywords();
      }
  
      public Logs queryLogs(String serviceId,
                            String serviceInstanceId,
                            String endpointId,
                            TraceScopeCondition relatedTrace,
                            Pagination paging,
                            Order queryOrder,
                            final Duration duration,
                            final List<Tag> tags,
                            List<String> keywordsOfContent,
                            List<String> excludingKeywordsOfContent) throws IOException {
          PaginationUtils.Page page = PaginationUtils.INSTANCE.exchange(paging);
  
          if (nonNull(keywordsOfContent)) {
              keywordsOfContent = keywordsOfContent.stream()
                                                   .filter(StringUtil::isNotEmpty)
                                                   .collect(Collectors.toList());
          }
          if (nonNull(excludingKeywordsOfContent)) {
              excludingKeywordsOfContent = excludingKeywordsOfContent.stream()
                                                                     .filter(StringUtil::isNotEmpty)
                                                                     .collect(Collectors.toList());
          }
  
          Logs logs = getLogQueryDAO().queryLogs(serviceId,
                                                 serviceInstanceId,
                                                 endpointId,
                                                 relatedTrace,
                                                 queryOrder,
                                                 page.getFrom(), page.getLimit(),
                                                 duration, tags,
                                                 keywordsOfContent, excludingKeywordsOfContent
          );
          logs.getLogs().forEach(log -> {
              if (StringUtil.isNotEmpty(log.getServiceId())) {
                  final IDManager.ServiceID.ServiceIDDefinition serviceIDDefinition = IDManager.ServiceID.analysisId(
                      log.getServiceId());
                  log.setServiceName(serviceIDDefinition.getName());
              }
              if (StringUtil.isNotEmpty(log.getServiceInstanceId())) {
                  final IDManager.ServiceInstanceID.InstanceIDDefinition instanceIDDefinition = IDManager.ServiceInstanceID
                      .analysisId(log.getServiceInstanceId());
                  log.setServiceInstanceName(instanceIDDefinition.getName());
              }
          });
          return logs;
      }
  }
  