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.profile.provider.handler;
  
  import io.grpc.Status;
  import io.grpc.stub.StreamObserver;
  import java.util.List;
  import java.util.concurrent.TimeUnit;
  import org.apache.skywalking.apm.network.common.v3.Commands;
  import org.apache.skywalking.apm.network.language.profile.v3.ProfileTaskCommandQuery;
  import org.apache.skywalking.apm.network.language.profile.v3.ProfileTaskFinishReport;
  import org.apache.skywalking.apm.network.language.profile.v3.ProfileTaskGrpc;
  import org.apache.skywalking.apm.network.language.profile.v3.ThreadSnapshot;
  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.analysis.worker.RecordStreamProcessor;
  import org.apache.skywalking.oap.server.core.cache.ProfileTaskCache;
  import org.apache.skywalking.oap.server.core.command.CommandService;
  import org.apache.skywalking.oap.server.core.profiling.trace.ProfileTaskLogRecord;
  import org.apache.skywalking.oap.server.core.profiling.trace.ProfileThreadSnapshotRecord;
  import org.apache.skywalking.oap.server.core.query.type.ProfileTask;
  import org.apache.skywalking.oap.server.core.query.type.ProfileTaskLogOperationType;
  import org.apache.skywalking.oap.server.library.module.ModuleManager;
  import org.apache.skywalking.oap.server.library.server.grpc.GRPCHandler;
  import org.apache.skywalking.oap.server.library.util.CollectionUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  public class ProfileTaskServiceHandler extends ProfileTaskGrpc.ProfileTaskImplBase implements GRPCHandler {
  
      private static final Logger LOGGER = LoggerFactory.getLogger(ProfileTaskServiceHandler.class);
  
      private ProfileTaskCache profileTaskCache;
      private final CommandService commandService;
  
      public ProfileTaskServiceHandler(ModuleManager moduleManager) {
          this.profileTaskCache = moduleManager.find(CoreModule.NAME).provider().getService(ProfileTaskCache.class);
          this.commandService = moduleManager.find(CoreModule.NAME).provider().getService(CommandService.class);
      }
  
      @Override
      public void getProfileTaskCommands(ProfileTaskCommandQuery request, StreamObserver<Commands> responseObserver) {
          // query profile task list by service id
          final String serviceId = IDManager.ServiceID.buildId(request.getService(), true);
          final String serviceInstanceId = IDManager.ServiceInstanceID.buildId(serviceId, request.getServiceInstance());
          final List<ProfileTask> profileTaskList = profileTaskCache.getProfileTaskList(serviceId);
          if (CollectionUtils.isEmpty(profileTaskList)) {
              responseObserver.onNext(Commands.newBuilder().build());
              responseObserver.onCompleted();
              return;
          }
  
          // build command list
          final Commands.Builder commandsBuilder = Commands.newBuilder();
          final long lastCommandTime = request.getLastCommandTime();
  
          for (ProfileTask profileTask : profileTaskList) {
              // if command create time less than last command time, means sniffer already have task
              if (profileTask.getCreateTime() <= lastCommandTime) {
                  continue;
              }
  
              // record profile task log
              recordProfileTaskLog(profileTask, serviceInstanceId, ProfileTaskLogOperationType.NOTIFIED);
  
              // add command
              commandsBuilder.addCommands(commandService.newProfileTaskCommand(profileTask).serialize().build());
          }
  
          responseObserver.onNext(commandsBuilder.build());
          responseObserver.onCompleted();
      }
  
      @Override
      public StreamObserver<ThreadSnapshot> collectSnapshot(StreamObserver<Commands> responseObserver) {
          return new StreamObserver<ThreadSnapshot>() {
              @Override
              public void onNext(ThreadSnapshot snapshot) {
                  if (LOGGER.isDebugEnabled()) {
                      LOGGER.debug("receive profile segment snapshot");
                  }
  
                  // build database data
                  final ProfileThreadSnapshotRecord record = new ProfileThreadSnapshotRecord();
                  record.setTaskId(snapshot.getTaskId());
                  record.setSegmentId(snapshot.getTraceSegmentId());
                  record.setDumpTime(snapshot.getTime());
                  record.setSequence(snapshot.getSequence());
                  record.setStackBinary(snapshot.getStack().toByteArray());
                  record.setTimeBucket(TimeBucket.getRecordTimeBucket(snapshot.getTime()));
  
                  // async storage
                  RecordStreamProcessor.getInstance().in(record);
              }
  
              @Override
              public void onError(Throwable throwable) {
                  Status status = Status.fromThrowable(throwable);
                  if (Status.CANCELLED.getCode() == status.getCode()) {
                      if (LOGGER.isDebugEnabled()) {
                          LOGGER.debug(throwable.getMessage(), throwable);
                      }
                      return;
                  }
                  LOGGER.error(throwable.getMessage(), throwable);
              }
  
              @Override
              public void onCompleted() {
                  responseObserver.onNext(Commands.newBuilder().build());
                  responseObserver.onCompleted();
              }
          };
      }
  
      @Override
      public void reportTaskFinish(ProfileTaskFinishReport request, StreamObserver<Commands> responseObserver) {
          // query task from cache, set log time bucket need it
          final String serviceId = IDManager.ServiceID.buildId(request.getService(), true);
          final String serviceInstanceId = IDManager.ServiceInstanceID.buildId(serviceId, request.getServiceInstance());
          final ProfileTask profileTask = profileTaskCache.getProfileTaskById(request.getTaskId());
  
          // record finish log
          if (profileTask != null) {
              recordProfileTaskLog(profileTask, serviceInstanceId, ProfileTaskLogOperationType.EXECUTION_FINISHED);
          }
  
          responseObserver.onNext(Commands.newBuilder().build());
          responseObserver.onCompleted();
      }
  
      private void recordProfileTaskLog(ProfileTask task, String instanceId, ProfileTaskLogOperationType operationType) {
          final ProfileTaskLogRecord logRecord = new ProfileTaskLogRecord();
          logRecord.setTaskId(task.getId());
          logRecord.setInstanceId(instanceId);
          logRecord.setOperationType(operationType.getCode());
          logRecord.setOperationTime(System.currentTimeMillis());
          // same with task time bucket, ensure record will ttl same with profile task
          long timestamp = task.getStartTime() + TimeUnit.MINUTES.toMillis(task.getDuration());
          logRecord.setTimeBucket(
              TimeBucket.getRecordTimeBucket(timestamp));
          logRecord.setTimestamp(timestamp);
          RecordStreamProcessor.getInstance().in(logRecord);
      }
  
  }
  