Java 策略模式（二）-实战

现在有个功能是根据工单的不同类型做对应的业务逻辑处理。

用策略模式来做

一、抽象出一个策略类

        第一个方法是业务逻辑处理

        第二个方法是返回工单类型

public interface ProblemStrategy {

    void handle(CrmProblemNoticeFollow follow, String logMsg);

    Integer getSmallProblemId();
}

 二、定义具体的策略实现类，下面贴出一个详细代码

/**
 * 催签收
 */
@Slf4j
@Component
@RequiredArgsConstructor
public class CQSProblemStrategy implements ProblemStrategy{
    private final WdgjImMessageMsUtil wdgjImMessageMsUtil;
    private final TrackUtil trackUtil;

    @Override
    public Integer getSmallProblemId() {
        return 606;
    }

    @Override
    public void handle(CrmProblemNoticeFollow follow, String logMsg) {
        log.info(logMsg + ", 催签收处理开始");
        // 圆钉提醒
        DataResult dataResult = null;
        YuanDingImMessageRequest yuanDingImMessageRequest = new YuanDingImMessageRequest();
        dataResult = wdgjImMessageMsUtil.urgePushMsg(yuanDingImMessageRequest, follow.getBusinessId(), follow.getWaybillNo(), follow.getBusinessDt(), follow.getBusinessSourceName());
        log.info(logMsg + ", 催签收处理，圆钉提醒，结果：{}", JacksonUtil.toJson(dataResult));
        // 插入一条轨迹
        List<String> stationInfo = wdgjImMessageMsUtil.getStationInfo(follow.getBusinessId(), follow.getBusinessDt());
        if (dataResult != null && dataResult.getStatus() == 0 && !CollectionUtils.isEmpty(stationInfo)) {
            boolean trackInsertResult = trackUtil.urgeTrack(follow, UrgeFollowTraceSourceTypeEnum.URGE_FOLLOW_AI_NOTICE_10H_KF, String.join(",", stationInfo), "");
            log.info(logMsg + "，添加轨迹=" + (trackInsertResult ? "成功" : "失败"));
        }
    }
}

三、 引入策略类， 根据工单类型选择具体实现

    @Autowired
    private final Map<String, ProblemStrategy> strategyMap = new HashMap<>();

    public ProblemStrategy getProblemStrategy (Integer smallProblemId) {
        for (String key : strategyMap.keySet()) {
            if (smallProblemId.equals(strategyMap.get(key).getSmallProblemId())) {
                return strategyMap.get(key);
            }
        }
        return null;
    }

            // 4、未完结，根据工单类型做对应处理
            ProblemStrategy problemStrategy = getProblemStrategy(follow.getSmallProblemId());
            if (problemStrategy != null) {
                problemStrategy.handle(follow, logMsg);
            }

一个策略模式就搞定了。