事件网格 EG-过滤规则示例:空值匹配

时间：2023-11-01 16:19:48

事件网格 EG 事件规则

空值匹配

检查某个字段的值是否为null或未定义。如下表所示，过滤规则只匹配“data”下“size”和“age”字段取值为null或未定义的事件。

从事件源接收的事件	过滤规则	过滤后的事件
{ "events":[{"id": "4b26115b-778e-11ec-******", "specversion": "1.0","source": "HC.OBS","type": "object:put","datacontenttype": "application/json","subject": "xxx.jpg","time": "2022-01-17T12:07:00.955Z","data": {"name": "test01","state": "enable", "size": null} }]}	{ "source": [{ "op": "StringIn", "values": ["HC.OBS"]}], "data":{ "size":[{ "op": "IsNull" }], "age":[{ "op": "IsNull" }] }}	{ "events":[{"id": "4b26115b-778e-11ec-******", "specversion": "1.0","source": "HC.OBS","type": "object:put","datacontenttype": "application/json","subject": "xxx.jpg","time": "2022-01-17T12:07:00.955Z","data": {"name": "test01","state": "enable", "size":null} }]}

从事件源接收的事件

过滤规则

过滤后的事件

{    "events":[{"id": "4b26115b-778e-11ec-******",        "specversion": "1.0","source": "HC.OBS","type": "object:put","datacontenttype": "application/json","subject": "xxx.jpg","time": "2022-01-17T12:07:00.955Z","data": {"name": "test01","state": "enable",                "size":  null}    }]}

{   "source": [{   "op": "StringIn",   "values": ["HC.OBS"]}],  "data":{    "size":[{     "op": "IsNull"           }],    "age":[{     "op": "IsNull"           }]  }}

{    "events":[{"id": "4b26115b-778e-11ec-******",        "specversion": "1.0","source": "HC.OBS","type": "object:put","datacontenttype": "application/json","subject": "xxx.jpg","time": "2022-01-17T12:07:00.955Z","data": {"name": "test01","state": "enable",                "size":null}    }]}

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