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package com.arextest.schedule.service;

import static com.arextest.schedule.common.CommonConstant.CREATE_PLAN_REDIS_EXPIRE;
import static com.arextest.schedule.common.CommonConstant.ONE_DAY_MILLIS;
import static com.arextest.schedule.common.CommonConstant.OPERATION_MAX_CASE_COUNT;
import static com.arextest.schedule.common.CommonConstant.STOP_PLAN_REDIS_EXPIRE;

import com.arextest.common.cache.CacheProvider;
import com.arextest.common.config.DefaultApplicationConfig;
import com.arextest.schedule.bizlog.BizLogger;
import com.arextest.schedule.common.CommonConstant;
import com.arextest.schedule.dao.mongodb.ReplayActionCaseItemRepository;
import com.arextest.schedule.dao.mongodb.ReplayPlanActionRepository;
import com.arextest.schedule.dao.mongodb.ReplayPlanRepository;
import com.arextest.schedule.exceptions.PlanRunningException;
import com.arextest.schedule.mdc.MDCTracer;
import com.arextest.schedule.model.CaseSourceEnvType;
import com.arextest.schedule.model.CommonResponse;
import com.arextest.schedule.model.ReplayActionCaseItem;
import com.arextest.schedule.model.ReplayActionItem;
import com.arextest.schedule.model.ReplayPlan;
import com.arextest.schedule.model.deploy.DeploymentVersion;
import com.arextest.schedule.model.deploy.ServiceInstance;
import com.arextest.schedule.model.plan.BuildReplayFailReasonEnum;
import com.arextest.schedule.model.plan.BuildReplayPlanRequest;
import com.arextest.schedule.model.plan.BuildReplayPlanResponse;
import com.arextest.schedule.model.plan.PlanStageEnum;
import com.arextest.schedule.model.plan.ReRunReplayPlanRequest;
import com.arextest.schedule.model.plan.StageStatusEnum;
import com.arextest.schedule.plan.PlanContext;
import com.arextest.schedule.plan.PlanContextCreator;
import com.arextest.schedule.plan.builder.BuildPlanValidateResult;
import com.arextest.schedule.plan.builder.ReplayPlanBuilder;
import com.arextest.schedule.planexecution.PlanExecutionMonitor;
import com.arextest.schedule.progress.ProgressEvent;
import com.arextest.schedule.utils.RedisKeyBuildUtils;
import com.arextest.schedule.utils.ReplayParentBinder;
import com.arextest.schedule.utils.StageUtils;
import java.nio.charset.StandardCharsets;
import java.util.Date;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import javax.annotation.Resource;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.CollectionUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

/**
 * Created by wang_yc on 2021/9/15
 */
@Service
@Slf4j
public class PlanProduceService {


  private static final String CASE_SOURCE_TO_OFFSET_MILLIS = "case.source.to.offset.millis";

  @Resource
  private List replayPlanBuilderList;
  @Resource
  private PlanContextCreator planContextCreator;
  @Resource
  private ReplayPlanRepository replayPlanRepository;
  @Resource
  private ReplayPlanActionRepository replayPlanActionRepository;
  @Resource
  private PlanConsumeService planConsumeService;
  @Resource
  private PlanConsumePrepareService planConsumePrepareService;
  @Resource
  private ProgressEvent progressEvent;
  @Resource
  private ConfigurationService configurationService;
  @Resource
  private CacheProvider redisCacheProvider;
  @Resource
  private PlanExecutionMonitor planExecutionMonitorImpl;
  @Resource
  private ReplayActionCaseItemRepository replayActionCaseItemRepository;
  @Resource
  private DefaultApplicationConfig defaultConfig;

  public CommonResponse createPlan(BuildReplayPlanRequest request) throws PlanRunningException {
    fillOptionalValueIfRequestMissed(request);
    progressEvent.onBeforePlanCreate(request);

    long planCreateMillis = System.currentTimeMillis();
    String appId = request.getAppId();
    if (isCreating(appId, request.getTargetEnv())) {
      progressEvent.onReplayPlanCreateException(request);
      return CommonResponse.badResponse("This appid is creating plan",
          new BuildReplayPlanResponse(BuildReplayFailReasonEnum.CREATING));
    }
    ReplayPlanBuilder planBuilder = select(request);
    if (planBuilder == null) {
      progressEvent.onReplayPlanCreateException(request);
      return CommonResponse.badResponse(
          "appId:" + appId + " unsupported replay planType : " + request.getReplayPlanType(),
          new BuildReplayPlanResponse(BuildReplayFailReasonEnum.INVALID_REPLAY_TYPE));
    }
    PlanContext planContext = planContextCreator.createByAppId(appId);
    BuildPlanValidateResult result = planBuilder.validate(request, planContext);
    if (result.failure()) {
      progressEvent.onReplayPlanCreateException(request);
      return CommonResponse.badResponse("appId:" + appId + " error: " + result.getRemark(),
          new BuildReplayPlanResponse(this.validateToResultReason(result)));
    }

    List replayActionItemList = planBuilder.buildReplayActionList(request,
        planContext);
    if (CollectionUtils.isEmpty(replayActionItemList)) {
      progressEvent.onReplayPlanCreateException(request);
      return CommonResponse.badResponse("appId:" + appId + " error: empty replay actions",
          new BuildReplayPlanResponse(BuildReplayFailReasonEnum.NO_INTERFACE_FOUND));
    }

    ReplayPlan replayPlan = build(request, planContext);
    replayPlan.setPlanCreateMillis(planCreateMillis);
    replayPlan.setReplayActionItemList(replayActionItemList);
    ReplayParentBinder.setupReplayActionParent(replayActionItemList, replayPlan);

    // todo: add trans
    progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.SAVE_PLAN,
        StageStatusEnum.ONGOING, System.currentTimeMillis(), null);
    if (!replayPlanRepository.save(replayPlan)) {
      progressEvent.onReplayPlanCreateException(request);
      return CommonResponse.badResponse("save replan plan error, " + replayPlan.toString(),
          new BuildReplayPlanResponse(BuildReplayFailReasonEnum.DB_ERROR));
    }
    isRunning(replayPlan.getId());
    MDCTracer.addPlanId(replayPlan.getId());
    planExecutionMonitorImpl.register(replayPlan);
    if (!replayPlanActionRepository.save(replayActionItemList)) {
      progressEvent.onReplayPlanCreateException(request);
      return CommonResponse.badResponse("save replay action error, " + replayPlan.toString(),
          new BuildReplayPlanResponse(BuildReplayFailReasonEnum.DB_ERROR));
    }
    progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.SAVE_PLAN,
        StageStatusEnum.SUCCEEDED,
        System.currentTimeMillis(), null);
    BizLogger.recordPlanStart(replayPlan);
    progressEvent.onReplayPlanCreated(replayPlan);
    planConsumeService.runAsyncConsume(replayPlan);
    return CommonResponse.successResponse("create plan success!" + result.getRemark(),
        new BuildReplayPlanResponse(replayPlan.getId()));
  }

  public void fillOptionalValueIfRequestMissed(BuildReplayPlanRequest request) {
    long currentTimeMillis = System.currentTimeMillis();
    Date fromDate = new Date(currentTimeMillis - CommonConstant.ONE_DAY_MILLIS);
    Date toDate = new Date(currentTimeMillis -
        defaultConfig.getConfigAsLong(CASE_SOURCE_TO_OFFSET_MILLIS, 0L));
    if (request.getCaseSourceFrom() == null) {
      request.setCaseSourceFrom(fromDate);
    }
    if (request.getCaseSourceTo() == null || request.getCaseSourceTo().after(toDate)) {
      request.setCaseSourceTo(toDate);
    }
    if (request.getCaseSourceType() == null) {
      request.setCaseSourceType(CaseSourceEnvType.TEST.getValue());
    }
  }

  public ReplayPlan build(BuildReplayPlanRequest request, PlanContext planContext) {
    String appId = request.getAppId();
    ReplayPlan replayPlan = new ReplayPlan();

    // init
    replayPlan.setReplayPlanStageList(StageUtils.initPlanStageList(StageUtils.INITIAL_STAGES));
    progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.BUILD_PLAN,
        StageStatusEnum.ONGOING, System.currentTimeMillis(), null);

    replayPlan.setAppId(appId);
    DeploymentVersion deploymentVersion = planContext.getTargetVersion();
    if (deploymentVersion != null) {
      replayPlan.setTargetImageId(deploymentVersion.getImageId());
      replayPlan.setTargetImageName(deploymentVersion.getImage().getName());
    }

    List serviceInstances = planContext.targetActiveInstance();
    replayPlan.setTargetHost(getIpAddress(serviceInstances));
    replayPlan.setTargetEnv(request.getTargetEnv());
    serviceInstances = planContext.sourceActiveInstance();
    if (CollectionUtils.isEmpty(serviceInstances)) {
      replayPlan.setSourceEnv(StringUtils.EMPTY);
      replayPlan.setSourceHost(StringUtils.EMPTY);
    } else {
      replayPlan.setSourceEnv(request.getSourceEnv());
      replayPlan.setSourceHost(getIpAddress(serviceInstances));
    }

    replayPlan.setPlanCreateTime(new Date());
    replayPlan.setOperator(request.getOperator());
    replayPlan.setCaseSourceFrom(request.getCaseSourceFrom());
    replayPlan.setCaseSourceTo(request.getCaseSourceTo());
    replayPlan.setCaseSourceType(request.getCaseSourceType());
    replayPlan.setReplayPlanType(request.getReplayPlanType());

    ConfigurationService.Application replayApp = configurationService.application(appId);
    if (replayApp != null) {
      replayPlan.setArexCordVersion(replayApp.getAgentVersion());
      replayPlan.setArexExtVersion(replayApp.getAgentExtVersion());
      replayPlan.setCaseRecordVersion(replayApp.getAgentExtVersion());
      replayPlan.setAppName(replayApp.getAppName());
    }
    replayPlan.setPlanName(getReplayName(request, replayApp));

    ConfigurationService.ScheduleConfiguration schedule = configurationService.schedule(appId);
    replayPlan.setReplaySendMaxQps(
        Optional.ofNullable(schedule).map(ConfigurationService.ScheduleConfiguration::getSendMaxQps)
            .orElse(null)
    );

    if (request.getCaseCountLimit() == null || request.getCaseCountLimit() <= 0) {
      replayPlan.setCaseCountLimit(OPERATION_MAX_CASE_COUNT);
    } else {
      replayPlan.setCaseCountLimit(request.getCaseCountLimit());
    }

    replayPlan.setMinInstanceCount(planContext.determineMinInstanceCount());

    // add the condition of "caseTag"
    replayPlan.setCaseTags(request.getCaseTags());

    progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.BUILD_PLAN,
        StageStatusEnum.SUCCEEDED, null, System.currentTimeMillis());
    return replayPlan;
  }

  private String getIpAddress(List serviceInstances) {
    return serviceInstances.stream().map(ServiceInstance::getIp).collect(Collectors.joining(","));
  }

  private String getReplayName(BuildReplayPlanRequest request,
      ConfigurationService.Application appInfo) {
    if (StringUtils.isNotBlank(request.getPlanName())) {
      return request.getPlanName();
    }
    StringBuilder stringBuilder = new StringBuilder();
    if (appInfo != null) {
      stringBuilder.append(appInfo.getAppName()).append("_");
    } else {
      stringBuilder.append("unknown-appName").append("_");
    }
    String currentTimeMillis = String.valueOf(System.currentTimeMillis());
    String lastSixDigits = currentTimeMillis.substring(currentTimeMillis.length() - 6);
    stringBuilder.append(lastSixDigits);
    return stringBuilder.toString();
  }

  public ReplayPlanBuilder select(BuildReplayPlanRequest request) {
    for (ReplayPlanBuilder replayPlanBuilder : replayPlanBuilderList) {
      if (replayPlanBuilder.isSupported(request)) {
        return replayPlanBuilder;
      }
    }
    return null;
  }

  public Boolean isCreating(String appId, String targetEnv) {
    try {
      byte[] key = String.format("schedule_creating_%s_%s", appId, targetEnv)
          .getBytes(StandardCharsets.UTF_8);
      byte[] value = appId.getBytes(StandardCharsets.UTF_8);
      boolean result = redisCacheProvider.putIfAbsent(key, CREATE_PLAN_REDIS_EXPIRE, value);
      return !result;
    } catch (Exception e) {
      LOGGER.error("isCreating error : {}", e.getMessage(), e);
      return true;
    }
  }

  public void removeCreating(String appId, String targetEnv) {
    try {
      byte[] key = String.format("schedule_creating_%s_%s", appId, targetEnv)
          .getBytes(StandardCharsets.UTF_8);
      redisCacheProvider.remove(key);
    } catch (Exception e) {
      LOGGER.error("removeCreating error : {}", e.getMessage(), e);
    }
  }

  public Boolean isRunning(String planId) {
    try {
      byte[] key = RedisKeyBuildUtils.buildPlanRunningRedisKey(planId);
      byte[] value = planId.getBytes(StandardCharsets.UTF_8);
      if (redisCacheProvider.get(key) != null) {
        return true;
      }
      redisCacheProvider.put(key, ONE_DAY_MILLIS, value);
      return false;
    } catch (Exception e) {
      LOGGER.error("isRunning error : {}", e.getMessage(), e);
      return true;
    }
  }

  public void stopPlan(String planId, String operator) {
    try {
      // set key for other instance to stop internal execution
      redisCacheProvider.putIfAbsent(RedisKeyBuildUtils.buildStopPlanRedisKey(planId),
          STOP_PLAN_REDIS_EXPIRE, planId.getBytes(StandardCharsets.UTF_8));

      // set the canceled status immediately to give quick response to user
      progressEvent.onReplayPlanTerminate(planId, "Plan Cancelled by " + operator);
    } catch (Exception e) {
      LOGGER.error("stopPlan error, planId: {}, message: {}", planId, e.getMessage());
    }
  }

  /**
   * map internal validation code to VO reason code
   */
  public BuildReplayFailReasonEnum validateToResultReason(BuildPlanValidateResult validateResult) {
    switch (validateResult.getCodeValue()) {
      case BuildPlanValidateResult.REQUESTED_EMPTY_OPERATION:
        return BuildReplayFailReasonEnum.NO_INTERFACE_FOUND;

      case BuildPlanValidateResult.UNSUPPORTED_CASE_SOURCE_TYPE:
        return BuildReplayFailReasonEnum.INVALID_SOURCE_TYPE;

      case BuildPlanValidateResult.REQUESTED_CASE_TIME_RANGE_UNSUPPORTED:
        return BuildReplayFailReasonEnum.INVALID_CASE_RANGE;

      case BuildPlanValidateResult.REQUESTED_TARGET_ENV_UNAVAILABLE:
      case BuildPlanValidateResult.REQUESTED_SOURCE_ENV_UNAVAILABLE:
        return BuildReplayFailReasonEnum.NO_ACTIVE_SERVICE_INSTANCE;
      default:
        return BuildReplayFailReasonEnum.UNKNOWN;
    }
  }

  public CommonResponse reRunPlan(ReRunReplayPlanRequest request) throws PlanRunningException {
    final String planId = request.getPlanId();
    final String planItemId = request.getPlanItemId();
    ReplayPlan replayPlan = replayPlanRepository.query(planId);
    if (replayPlan == null) {
      progressEvent.onReplayPlanReRunException(replayPlan);
      return CommonResponse.badResponse("target plan not found");
    }
    replayPlan.setPlanCreateMillis(System.currentTimeMillis());
    progressEvent.onBeforePlanReRun(replayPlan);
    if (replayPlan.getReplayPlanStageList() == null) {
      progressEvent.onReplayPlanReRunException(replayPlan);
      return CommonResponse.badResponse("The plan's version is too old");
    }
    List failedCaseList = replayActionCaseItemRepository.failedCaseList(
        planId, planItemId);
    if (CollectionUtils.isEmpty(failedCaseList)) {
      progressEvent.onReplayPlanReRunException(replayPlan);
      return CommonResponse.badResponse("No failed case or cases are expired!");
    }

    if (isRunning(planId)) {
      progressEvent.onReplayPlanReRunException(replayPlan);
      return CommonResponse.badResponse("This plan is Running");
    }
    replayPlan.setReRun(Boolean.TRUE);
    replayPlan.setOperator(request.getOperator());

    try {
      ConfigurationService.ScheduleConfiguration schedule = configurationService.schedule(
          replayPlan.getAppId());
      if (schedule != null) {
        replayPlan.setReplaySendMaxQps(schedule.getSendMaxQps());
      }

      planExecutionMonitorImpl.register(replayPlan);

      progressEvent.onReplayPlanReRun(replayPlan);
      progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.LOADING_CASE,
          StageStatusEnum.ONGOING, System.currentTimeMillis(), null);

      progressEvent.onUpdateFailedCases(replayPlan, failedCaseList);
      planConsumePrepareService.updateFailedActionAndCase(replayPlan, failedCaseList);
      if (CollectionUtils.isEmpty(replayPlan.getReplayActionItemList())) {
        throw new RuntimeException("no replayActionItem!");
      }

      progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.LOADING_CASE,
          StageStatusEnum.SUCCEEDED, null, System.currentTimeMillis());
    } catch (Exception e) {
      progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.LOADING_CASE,
          StageStatusEnum.FAILED, null, System.currentTimeMillis());
      progressEvent.onReplayPlanStageUpdate(replayPlan, PlanStageEnum.RE_RUN,
          StageStatusEnum.FAILED, System.currentTimeMillis(), null);
      planExecutionMonitorImpl.deregister(replayPlan);
      progressEvent.onReplayPlanReRunException(replayPlan, e);
      return CommonResponse.badResponse("ReRun plan failed!");
    }
    planConsumeService.runAsyncConsume(replayPlan);
    return CommonResponse.successResponse("ReRun plan success!",
        new BuildReplayPlanResponse(replayPlan.getId()));
  }
}




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