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.receiver.browser.provider.parser.errorlog.listener;
  
  import lombok.RequiredArgsConstructor;
  import lombok.extern.slf4j.Slf4j;
  import org.apache.skywalking.oap.server.library.util.StringUtil;
  import org.apache.skywalking.oap.server.core.CoreModule;
  import org.apache.skywalking.oap.server.core.analysis.IDManager;
  import org.apache.skywalking.oap.server.core.analysis.TimeBucket;
  import org.apache.skywalking.oap.server.core.browser.source.BrowserErrorCategory;
  import org.apache.skywalking.oap.server.core.browser.source.BrowserErrorLog;
  import org.apache.skywalking.oap.server.core.config.NamingControl;
  import org.apache.skywalking.oap.server.core.source.SourceReceiver;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.receiver.browser.provider.BrowserServiceModuleConfig;
  import org.apache.skywalking.oap.server.receiver.browser.provider.parser.errorlog.BrowserErrorLogDecorator;
  
  /**
   * ErrorLogRecordListener forwards the error log raw data to the persistence layer with the query required conditions.
   */
  @Slf4j
  @RequiredArgsConstructor
  public class ErrorLogRecordListener implements ErrorLogAnalysisListener {
      private final NamingControl namingControl;
      private final SourceReceiver sourceReceiver;
      private final BrowserErrorLog errorLog = new BrowserErrorLog();
      private final ErrorLogRecordSampler sampler;
      private SampleStatus sampleStatus = SampleStatus.UNKNOWN;
  
      /**
       * Send BrowserErrorLog to the oreceiver.
       */
      @Override
      public void build() {
          if (sampleStatus.equals(SampleStatus.SAMPLED)) {
              sourceReceiver.receive(errorLog);
          }
      }
  
      @Override
      public void parse(final BrowserErrorLogDecorator decorator) {
          // sample
          if (StringUtil.isEmpty(decorator.getUniqueId())) {
              if (log.isDebugEnabled()) {
                  log.debug("Because uniqueId is empty BrowserErrorLog is ignored.");
              }
              sampleStatus = SampleStatus.IGNORED;
              return;
          }
  
          if (!sampler.shouldSample(decorator.getUniqueId().hashCode())) {
              sampleStatus = SampleStatus.IGNORED;
              return;
          }
          sampleStatus = SampleStatus.SAMPLED;
  
          // error log
          errorLog.setUniqueId(decorator.getUniqueId());
          errorLog.setTimeBucket(TimeBucket.getRecordTimeBucket(decorator.getTime()));
          errorLog.setTimestamp(decorator.getTime());
  
          // service
          String serviceName = namingControl.formatServiceName(decorator.getService());
          String serviceId = IDManager.ServiceID.buildId(serviceName, true);
          errorLog.setServiceId(serviceId);
  
          // service version
          errorLog.setServiceVersionId(IDManager.ServiceInstanceID.buildId(serviceId, namingControl.formatInstanceName(
              decorator.getServiceVersion())));
  
          // page
          String pagePath = namingControl.formatEndpointName(serviceName, decorator.getPagePath());
          errorLog.setPagePathId(IDManager.EndpointID.buildId(serviceId, pagePath));
  
          // raw data
          errorLog.setErrorCategory(BrowserErrorCategory.fromErrorCategory(decorator.getCategory()));
          errorLog.setDataBinary(decorator.toByteArray());
      }
  
      private enum SampleStatus {
          UNKNOWN, SAMPLED, IGNORED
      }
  
      public static class Factory implements ErrorLogListenerFactory {
          private final SourceReceiver sourceReceiver;
          private final NamingControl namingControl;
          private final ErrorLogRecordSampler sampler;
  
          public Factory(ModuleManager moduleManager, BrowserServiceModuleConfig moduleConfig) {
              this.sourceReceiver = moduleManager.find(CoreModule.NAME).provider().getService(SourceReceiver.class);
              this.namingControl = moduleManager.find(CoreModule.NAME).provider().getService(NamingControl.class);
              this.sampler = new ErrorLogRecordSampler(moduleConfig.getSampleRate());
          }
  
          @Override
          public ErrorLogAnalysisListener create(final ModuleManager moduleManager,
                                                 final BrowserServiceModuleConfig moduleConfig) {
              return new ErrorLogRecordListener(namingControl, sourceReceiver, sampler);
          }
      }
  }
  