[update] 诊断优化，提示缺少路口实时数据

signal-control-service/src/main/java/net/wanji/web/service/scheme/impl/CrossConfigServiceImpl.java

@@ -382,6 +382,9 @@ public class CrossConfigServiceImpl implements CrossConfigService {
             // 查询拥堵状态、排队长度和指数
             CrossDirDataRealtimePO crossDirDataRealtimePO =
                     crossDirDataRealtimeMapper.selectByCrossIdAndDirType(crossId, key);
+            if (crossDirDataRealtimePO == null) {
+                throw new RuntimeException("没有该路口方向实时数据");
+            }
             dirListElement.setStatus(crossDirDataRealtimePO.getStatus());
             dirListElement.setTraffic_index(crossDirDataRealtimePO.getTrafficIndex());
             dirListElement.setLength(crossDirDataRealtimePO.getLength());