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[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
我对WSO2 CEP Siddhi QL还是很陌生,我有一个要求来分析具有多个参数的多个节点的事件。 siddi有可能吗? 如果是,我该如何实现呢?
执行计划
@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;
由于我不得不等待获取其他节点的数据。如何处理多个事件..?
我认为Siddhi不可能做到这一点。 Siddhi将处理“每个事件”的基础,因此,无法评估需要多个事件输入的此类过滤器 。
但是,如果您知道事件的到达顺序(即节点11之后是节点12, 依此类推 ),以及节点计数,则可以使用Siddhi模式来实现;
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;
通过将流拆分为多个,可以访问具有多参数的多节点,并且可以访问它。 这是通过使用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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