获取设备类型时，增加返回字段：设备实例数量

src/main/java/com/esv/datacenter/iot/module/devicemodel/dao/DeviceInstanceDao.java

@@ -6,6 +6,9 @@ import com.esv.datacenter.iot.module.devicemodel.entity.DeviceInstanceEntity;
 import com.esv.datacenter.iot.module.devicemodel.form.DeviceInstanceForm;
 import org.apache.ibatis.annotations.Mapper;
 
+import java.util.List;
+import java.util.Map;
+
 /**
  * 设备实例表
  * 
@@ -25,5 +28,14 @@ public interface DeviceInstanceDao extends BaseMapper<DeviceInstanceEntity> {
      * @createTime 2020/08/07 13:37
      **/
     IPage select4Page(IPage page, DeviceInstanceForm queryObj);
+
+    /**
+     * @description 查询设备类型的实例数量
+     * @param queryObj:
+     * @return java.util.List<java.util.Map<java.lang.String,java.lang.Long>>
+     * @author huangChaobin@esvtek.com
+     * @createTime 2020/08/10 17:28
+     **/
+    List<Map<String, Long>> selectInstanceCountByType(Map<String, Object> queryObj);
 	
 }

src/main/java/com/esv/datacenter/iot/module/devicemodel/service/DeviceInstanceService.java

@@ -7,6 +7,7 @@ import com.esv.datacenter.iot.module.devicemodel.form.DeviceInstanceForm;
 import com.esv.datacenter.iot.module.devicemodel.vo.DeviceInstanceVO;
 
 import java.util.List;
+import java.util.Map;
 
 /**
  * 设备实例Service
@@ -89,5 +90,14 @@ public interface DeviceInstanceService extends IService<DeviceInstanceEntity> {
      **/
     List<DeviceInstanceVO> getInstanceListByTypeId(Long deviceTypeId);
 
+    /**
+     * @description 查询设备类型的实例数量
+     * @param deviceTypeId:
+     * @return java.util.Map<java.lang.String,java.lang.Long>
+     * @author huangChaobin@esvtek.com
+     * @createTime 2020/08/10 17:30
+     **/
+    Map<String, Long> getInstanceCountByType(Long deviceTypeId);
+
 }
 

src/main/java/com/esv/datacenter/iot/module/devicemodel/service/impl/DeviceInstanceServiceImpl.java

@@ -13,14 +13,11 @@ import com.esv.datacenter.iot.module.devicemodel.entity.DeviceInstanceEntity;
 import com.esv.datacenter.iot.module.devicemodel.form.DeviceInstanceForm;
 import com.esv.datacenter.iot.module.devicemodel.service.DeviceInstanceService;
 import com.esv.datacenter.iot.module.devicemodel.vo.DeviceInstanceVO;
-import com.esv.datacenter.iot.module.devicemodel.vo.DeviceTypeVO;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.BeanUtils;
 import org.springframework.stereotype.Service;
 
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Objects;
+import java.util.*;
 
 
 @Service("deviceInstanceService")
@@ -118,4 +115,20 @@ public class DeviceInstanceServiceImpl extends ServiceImpl<DeviceInstanceDao, De
 
         return voList;
     }
+
+    @Override
+    public Map<String, Long> getInstanceCountByType(Long deviceTypeId) {
+        Map<String, Object> queryObj = new HashMap<>(1);
+        if (Objects.nonNull(deviceTypeId)) {
+            queryObj.put("deviceTypeId", deviceTypeId);
+        }
+        List<Map<String, Long>> instanceCountMapList = this.getBaseMapper().selectInstanceCountByType(queryObj);
+
+        Map<String, Long> instanceCountMap = new HashMap<>(instanceCountMapList.size());
+        for (Map<String, Long> map : instanceCountMapList) {
+            instanceCountMap.put(String.valueOf(map.get("device_type_id")), map.get("count"));
+        }
+
+        return instanceCountMap;
+    }
 }
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src/main/java/com/esv/datacenter/iot/module/devicemodel/service/impl/DeviceTypeServiceImpl.java

@@ -16,6 +16,7 @@ import com.esv.datacenter.iot.module.devicemodel.dao.DeviceTypeDao;
 import com.esv.datacenter.iot.module.devicemodel.entity.DeviceTypeEntity;
 import com.esv.datacenter.iot.module.devicemodel.form.DeviceTypeForm;
 import com.esv.datacenter.iot.module.devicemodel.service.DeviceDataMapService;
+import com.esv.datacenter.iot.module.devicemodel.service.DeviceInstanceService;
 import com.esv.datacenter.iot.module.devicemodel.service.DeviceTypeService;
 import com.esv.datacenter.iot.module.devicemodel.vo.DeviceTypeBriefVO;
 import com.esv.datacenter.iot.module.devicemodel.vo.DeviceTypeVO;
@@ -26,6 +27,7 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 
 
@@ -36,6 +38,8 @@ public class DeviceTypeServiceImpl extends ServiceImpl<DeviceTypeDao, DeviceType
     private DeviceDataMapService deviceDataMapService;
     @Autowired
     private DataModelPropertyService dataModelPropertyService;
+    @Autowired
+    private DeviceInstanceService deviceInstanceService;
 
     @Override
     public Long insertDeviceType(DeviceTypeForm form) {
@@ -84,14 +88,24 @@ public class DeviceTypeServiceImpl extends ServiceImpl<DeviceTypeDao, DeviceType
 
     @Override
     public PageResultVO getType4Page(DeviceTypeForm form) {
+        // 分页查询设备类型
         IPage<DeviceTypeEntity> page = new Page<>(form.getPageNum(), form.getPageSize());
         this.baseMapper.select4Page(page, form);
 
+        // 查询设备类型对应的实例数量
+        Map<String, Long> instanceCountMap = deviceInstanceService.getInstanceCountByType(null);
+
         List<DeviceTypeEntity> entityList = page.getRecords();
         List<DeviceTypeVO> voList = new ArrayList<>();
+        Long instanceCount;
         for (DeviceTypeEntity entity : entityList) {
             DeviceTypeVO vo = new DeviceTypeVO();
             BeanUtils.copyProperties(entity, vo);
+            instanceCount = instanceCountMap.get(String.valueOf(entity.getId()));
+            if (Objects.isNull(instanceCount)) {
+                instanceCount = 0L;
+            }
+            vo.setInstanceCount(instanceCount);
             vo.setCreateTime(entity.getCreateTime().getTime());
             vo.setUpdateTime(entity.getUpdateTime().getTime());
             voList.add(vo);

src/main/java/com/esv/datacenter/iot/module/devicemodel/vo/DeviceTypeVO.java

@@ -25,6 +25,10 @@ public class DeviceTypeVO {
      * 描述
      */
     private String description;
+    /**
+     * 设备实例数量
+     */
+    private Long instanceCount;
     /**
      * 创建者
      */

src/main/resources/mapper/devicemodel/DeviceInstanceDao.xml

@@ -41,4 +41,14 @@
         ORDER BY a.name ASC
     </select>
 
+    <select id="selectInstanceCountByType" parameterType="java.util.Map" resultType="java.util.Map">
+        select device_type_id, count(id) as count
+        from device_instance
+        where deleted = false
+        <if test="deviceTypeId != null">
+            and device_type_id = #{deviceTypeId}
+        </if>
+        group by device_type_id
+    </select>
+
 </mapper>
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