第三天：内存增删改插件

思路：内存跟硬盘类似，都是以插槽来判断变更，与硬盘插件基本相同

 

问题：硬盘做变更日志时出现类型不同的问题，如果用硬盘的处理方式，也会出错。

解决：错误都是类型出错，所以根据数据类型调整，内存变更信息不需要都转成字符串比较。

 

from repository import models

class Memory(object):

    def __init__(self,server_obj,info):
        self.server_obj = server_obj
        self.memory_dict = info

    def process(self):
        new_memory_info_dict = self.memory_dict['data']
        """
        {客户端发来的数据}
        """
        old_memory_info_list = self.server_obj.memory.all()
        """
        [obj,obj,obj,]
        """

        # 取新旧两个集合
        new_memory_slot_set = set(new_memory_info_dict.keys())
        old_memory_slot_set = {obj.slot for obj in old_memory_info_list}

        # 得到增加删除更新的列表
        add_slot_list = new_memory_slot_set.difference(old_memory_slot_set)
        del_slot_list = old_memory_slot_set.difference(new_memory_slot_set)
        update_slot_list = old_memory_slot_set.intersection(new_memory_slot_set)

        record_list = []
        # 增加
        for slot in add_slot_list:
            value = new_memory_info_dict[slot]
            record = "[%s]的插槽[%s]增加内存[%s]" % (self.server_obj, slot, value)
            record_list.append(record)
            value['server_obj'] = self.server_obj
            models.Memory.objects.create(**value)

        # 删除
        models.Memory.objects.filter(server_obj=self.server_obj, slot__in=del_slot_list).delete()
        for slot in del_slot_list:
            record = "[%s]的插槽[%s]去除内存" % (self.server_obj, slot)
            record_list.append(record)


        # 更新
        for slot in update_slot_list:
            value = new_memory_info_dict[slot]
            obj = models.Memory.objects.filter(server_obj=self.server_obj, slot=slot).first()
            for k, new_val in value.items():
                old_val = getattr(obj, k)
                if old_val != new_val:
                    setattr(obj, k, new_val)
                    record = "[%s]的插槽[%s]内存由[%s]改为[%s]" % (self.server_obj, slot, old_val, new_val)
                    record_list.append(record)
            obj.save()

        if record_list:
            models.ServerRecord.objects.create(server_obj=self.server_obj, content=';\n'.join(record_list))

 

 

内存添加：内容及变更记录

 

变更内存信息：

 

 

 

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