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.analyzer.agent.kafka.provider.handler;
  
  import lombok.extern.slf4j.Slf4j;
  import org.apache.kafka.clients.consumer.ConsumerRecord;
  import org.apache.kafka.common.utils.Bytes;
  import org.apache.skywalking.apm.network.language.profile.v3.ThreadSnapshot;
  import org.apache.skywalking.oap.server.analyzer.agent.kafka.module.KafkaFetcherConfig;
  import org.apache.skywalking.oap.server.core.analysis.TimeBucket;
  import org.apache.skywalking.oap.server.core.analysis.worker.RecordStreamProcessor;
  import org.apache.skywalking.oap.server.core.profiling.trace.ProfileThreadSnapshotRecord;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.telemetry.TelemetryModule;
  import org.apache.skywalking.oap.server.telemetry.api.CounterMetrics;
  import org.apache.skywalking.oap.server.telemetry.api.HistogramMetrics;
  import org.apache.skywalking.oap.server.telemetry.api.HistogramMetrics.Timer;
  import org.apache.skywalking.oap.server.telemetry.api.MetricsCreator;
  import org.apache.skywalking.oap.server.telemetry.api.MetricsTag.Keys;
  import org.apache.skywalking.oap.server.telemetry.api.MetricsTag.Values;
  
  /**
   * A handler deserializes the message of profiling snapshot and pushes it to downstream.
   */
  @Slf4j
  public class ProfileTaskHandler extends AbstractKafkaHandler {
      private final HistogramMetrics histogram;
      private final CounterMetrics errorCounter;
  
      public ProfileTaskHandler(ModuleManager manager, KafkaFetcherConfig config) {
          super(manager, config);
          MetricsCreator metricsCreator = manager.find(TelemetryModule.NAME)
                  .provider()
                  .getService(MetricsCreator.class);
          histogram = metricsCreator.createHistogramMetric(
                  "profile_task_in_latency",
                  "The process latency of profile task",
                  new Keys("protocol"),
                  new Values("kafka")
          );
          errorCounter = metricsCreator.createCounter(
                  "profile_task_analysis_error_count",
                  "The error number of profile task process",
                  new Keys("protocol"),
                  new Values("kafka")
          );
      }
  
      @Override
      public void handle(final ConsumerRecord<String, Bytes> record) {
          try (Timer ignored = histogram.createTimer()) {
              ThreadSnapshot snapshot = ThreadSnapshot.parseFrom(record.value().get());
              if (log.isDebugEnabled()) {
                  log.debug(
                      "Fetched a thread snapshot[{}] from task[{}] reported",
                      snapshot.getTraceSegmentId(),
                      snapshot.getTaskId()
                  );
              }
  
              final ProfileThreadSnapshotRecord snapshotRecord = new ProfileThreadSnapshotRecord();
              snapshotRecord.setTaskId(snapshot.getTaskId());
              snapshotRecord.setSegmentId(snapshot.getTraceSegmentId());
              snapshotRecord.setDumpTime(snapshot.getTime());
              snapshotRecord.setSequence(snapshot.getSequence());
              snapshotRecord.setStackBinary(snapshot.getStack().toByteArray());
              snapshotRecord.setTimeBucket(TimeBucket.getRecordTimeBucket(snapshot.getTime()));
  
              RecordStreamProcessor.getInstance().in(snapshotRecord);
          } catch (Exception e) {
              errorCounter.inc();
              log.error("handle record failed", e);
          }
      }
  
      @Override
      protected String getPlainTopic() {
          return config.getTopicNameOfProfiling();
      }
  }
  