[英]Can wso2 siddhi CEP accept stream of user defined objects? Can the rule be specified to access attributes of the object?
[英]WSO2 CEP :Siddhi QL: Can i access multiple attributes in a single execution plan
我對WSO2 CEP Siddhi QL還是很陌生,我有一個要求來分析具有多個參數的多個節點的事件。 siddi有可能嗎? 如果是,我該如何實現呢?
執行計划
@Plan:name('ExecutionPlan')
@Import('InputStream:1.0.0')
define stream InputStream (node string, param1 int, param2 double, param3 string, param4 string, param5 string, param6 string, param7 string,......,param120 string);
@Export('outputStream:1.0.0')
define stream OutputStream (val1 string, param3 string);
from InputStream [(node == 11 AND Param2 < 110)
AND
(node == 12 AND Param3 > 40)
AND
(node == x AND Paramx > some value)] #window.time(1 sec)
select node as val1, param2 as param2, param3 as param3
insert into OutputStream;
由於我不得不等待獲取其他節點的數據。如何處理多個事件..?
我認為Siddhi不可能做到這一點。 Siddhi將處理“每個事件”的基礎,因此,無法評估需要多個事件輸入的此類過濾器 。
但是,如果您知道事件的到達順序(即節點11之后是節點12, 依此類推 ),以及節點計數,則可以使用Siddhi模式來實現;
例如:
from every( e1=InputStream[node == 11 AND Param2 < 110] ) -> e2=InputStream[node == 12 AND Param3 > 40] -> eX=InputStream[node == X AND ParamY > ZZ]
select e1.node as val1, e1.param2 as param2, e2.param3 as param3
insert into OutputStream;
通過將流拆分為多個,可以訪問具有多參數的多節點,並且可以訪問它。 這是通過使用WSO2中的模式完成的。
from every (e1=InputStream) -> (e2=InputStream)-> e3=InputStream[(e1.node == '11' AND e1.param1 > 500 AND e1.param2 > 1000 ) AND (e2.node =='12' AND e2.param3 > 200 AND e2.param1 < 100)] within x mins
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