[email protected]异步线程池的配置及应用

示例：

1、 配置

@EnableAsync
@Configuration
public class TaskExecutorConfiguration {

    @Autowired
    private TaskExecutorProperties taskExecutorProperties;

    @Bean
    public Executor routeGen() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(taskExecutorProperties.getCorePoolSize());     //50
        executor.setQueueCapacity(taskExecutorProperties.getQueueCapacity());   //200
        executor.setMaxPoolSize(taskExecutorProperties.getMaxPoolSize());       //500
        executor.setKeepAliveSeconds(taskExecutorProperties.getKeepAliveSeconds());
        executor.setThreadNamePrefix("gen-");
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
        executor.initialize();
        return executor;
    }}

2、 运用(作用于方法上)

@Async("routeGen") public Future<Result<String>> genRouteByCategory(RouteGenDTO routeGenDTO, List<String> cityList, String category){}

3、 异常处理及日志记录

   public Result<String> genRouteByShard(RouteGenDTO routeGenDTO) throws RouteGenException {

        // 根据分片获取城市
        Result<List<String>> cityResult = cityService.queryAllCity();
        if (cityResult == null || !cityResult.isSuccess()) {
            String errorMsg = cityResult == null ? "查询城市没有返回结果" : cityResult.getMsg();
            // 记录查询城市日志
            logQueryCityByShard(RouteJobTypeEnum.ROUTE_GEN, routeGenDTO, null, errorMsg);
            return Result.ofFail(ErrorEnum.QUERY_ERROR.getCode(), errorMsg);
        }

        List<String> cityList = cityResult.getData();
        if (CollectionUtils.isEmpty(cityList)) {
            String errorMsg = "没有查询到城市，无需生成路线";
            // 记录查询城市日志
            logQueryCityByShard(RouteJobTypeEnum.ROUTE_GEN, routeGenDTO, null, errorMsg);
            return Result.ofSuccessMsg(errorMsg);
        }

        // 记录查询城市日志
        logQueryCityByShard(RouteJobTypeEnum.ROUTE_GEN, routeGenDTO, JSON.toJSONString(cityList), null);

        Map<String, Future<Result<String>>> categoryFutureMap = new ConcurrentHashMap<>();

        // 禁用的类别列表
        List<String> disableCategoryList = null;
        String disableCategory = genProperties.getDisableCategory();
        if (StringUtils.isNotBlank(disableCategory)) {
            String[] disableCategoryArr = disableCategory.split(",");
            disableCategoryList = Stream.of(disableCategoryArr).collect(Collectors.toList());
        }

        // 根据类别生成路线
        // 每个类别一个线程
        for (RouteCategoryEnum routeCategory : RouteCategoryEnum.values()) {
            // 跳过禁用的类别
            if (CollectionUtils.isNotEmpty(disableCategoryList) && disableCategoryList.contains(routeCategory.getType())) {
                // 记录生成日志
                logGenRouteByCategory(RouteJobTypeEnum.ROUTE_GEN, routeGenDTO, routeCategory.getType(), routeCategory.getType() + "类别被禁用，无需生成");
                continue;
            }

            // 根据城市和类别生成路线
            Future<Result<String>> categoryFuture = routeGenService.genRouteByCategory(routeGenDTO, cityList, routeCategory.getType());
            categoryFutureMap.put(routeCategory.getType(), categoryFuture);
        }

        String lastErrorMsg = null;

        for (Map.Entry<String, Future<Result<String>>> entry : categoryFutureMap.entrySet()) {

            String errorMsg = null;

            String category = entry.getKey();
            Future<Result<String>> futureResult = entry.getValue();
            if (futureResult != null) {
                try {
                    if (futureResult.isCancelled()) {
                        errorMsg = "线程被取消";
                        log.error("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 处理失败,错误描述:{}",
                                routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), errorMsg);
                        continue;
                    }
                    Result<String> result = futureResult.get(CommonConfConstants.FUTURE_CATEGORY_WAIT_TIME, TimeUnit.SECONDS);

                    if (result == null || !result.isSuccess()) {
                        errorMsg = result == null ? category + "没有返回处理结果" : result.getMsg();
                        log.error("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 处理失败,错误描述:{}",
                                routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), errorMsg);
                    } else {
                        log.info("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 生成成功",
                                routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), result);
                    }
                } catch (TimeoutException e) {
                    errorMsg = category + "生成路线 线程处理超时:" + e.getMessage();
                    log.error("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 线程处理超时",
                            routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), e);
                } catch (InterruptedException e) {
                    errorMsg = category + "生成路线 线程中断异常:" + e.getMessage();
                    log.error("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 线程中断异常",
                            routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), e);
                } catch (ExecutionException e) {
                    errorMsg = category + "生成路线 线程执行异常:" + e.getMessage();
                    log.error("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 线程执行异常",
                            routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), e);
                }

            } else {
                errorMsg = category + "生成路线 线程返回结果为null";
                log.error("分片项{} 分片总数{} 生成 {} 路线 任务开始时间:{} 处理失败,错误描述:{}",
                        routeGenDTO.getShardItem(), routeGenDTO.getShardTotal(), category, routeGenDTO.getStartTime(), errorMsg);
            }

            // 记录生成日志
            logGenRouteByCategory(RouteJobTypeEnum.ROUTE_GEN, routeGenDTO, category, errorMsg);

            if (StringUtils.isNotBlank(errorMsg)) {
                lastErrorMsg = errorMsg;
            }
        }

        if (StringUtils.isNotBlank(lastErrorMsg)) {
            return Result.ofFail(ErrorEnum.GEN_ROUTE_FAILURE.getCode(), lastErrorMsg);
        }

        return Result.ofSuccess("路线生成成功");
    }

private void logQueryCityByShard(RouteJobTypeEnum routeJobTypeEnum, RouteGenDTO routeGenDTO, String cityJson, String errorMsg) {    String logFormat;    String logMsg;    if (StringUtils.isBlank(errorMsg)) {        logFormat = "查询城市成功,城市信息:%s";        logMsg = String.format(logFormat, cityJson);    } else {        logMsg = errorMsg;    }

    String operationObject = routeJobTypeEnum.getType() + "_job_"            + routeGenDTO.getShardItem() + "_"            + TimeUtil.dateTimeToStr(routeGenDTO.getStartTime(), DateFormatConstants.DATE_TIME_COMPACT_FORMAT);

    LogInfoDTO logInfoDTO = new LogInfoDTO();    logInfoDTO.setBusinessName(routeJobTypeEnum.getDesc());    logInfoDTO.setOperationName("根据分片查询城市");    logInfoDTO.setOperationObject(operationObject);    logInfoDTO.setOperationDesc(logMsg);    LogUtil.log(logInfoDTO);}

原文地址：https://www.cnblogs.com/gendway/p/10695949.html