WSO2 CEP + Handle null values

Question

Currently WSO2 CEP is triggered using some Http requests. But some times triggered request has null values. At that time how to handle those null values using CEP.

Is it about sending events to CEP http receivers where some attributes have null values? — Tharik Kanaka, Apr 29 '16 at 04:48

score 1 · Accepted Answer · answered Apr 29 '16 at 08:33

There two ways of fixing this

Using default values in Event Receiver input event mapping https://docs.wso2.com/display/CEP410/Input+Mapping+Types
Using Siddhi by checking is null operator with in the query https://docs.wso2.com/display/CEP410/SiddhiQL+Guide+3.0#SiddhiQLGuide3.0-QueryProjection

WSO2 CEP + Handle null values

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