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.log.analyzer.provider;
  
  import com.google.common.base.Splitter;
  import com.google.common.base.Strings;
  
  import java.io.IOException;
  import java.util.List;
  import lombok.EqualsAndHashCode;
  import lombok.Getter;
  import lombok.Setter;
  import org.apache.skywalking.oap.meter.analyzer.prometheus.rule.Rule;
  import org.apache.skywalking.oap.meter.analyzer.prometheus.rule.Rules;
  import org.apache.skywalking.oap.server.library.module.ModuleConfig;
  import org.apache.skywalking.oap.server.library.module.ModuleStartException;
  
  import static java.util.Objects.nonNull;
  
  @EqualsAndHashCode(callSuper = false)
  public class LogAnalyzerModuleConfig extends ModuleConfig {
      @Getter
      @Setter
      private String lalPath = "lal";
  
      @Getter
      @Setter
      private String malPath = "log-mal-rules";
  
      @Getter
      @Setter
      private String lalFiles = "default.yaml";
  
      @Getter
      @Setter
      private String malFiles;
  
      private List<Rule> meterConfigs;
  
      public List<String> lalFiles() {
          return Splitter.on(",").omitEmptyStrings().trimResults().splitToList(Strings.nullToEmpty(getLalFiles()));
      }
  
      public List<Rule> malConfigs() throws ModuleStartException {
          if (nonNull(meterConfigs)) {
              return meterConfigs;
          }
          final List<String> files = Splitter.on(",")
                                             .omitEmptyStrings()
                                             .splitToList(Strings.nullToEmpty(getMalFiles()));
          try {
              meterConfigs = Rules.loadRules(getMalPath(), files);
          } catch (IOException e) {
              throw new ModuleStartException("Failed to load MAL rules", e);
          }
  
          return meterConfigs;
      }
  }
  