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To create an event builder or execution plan it is mandatory to create necessary event streams before hand.
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Other than the server UI, you can also define the stream definition using a config file which is in the <CEP_HOME>/repository/conf/stream-manager-config.xml. But this file used to create streams only in the server start-up (This file is not hot deploy-able). Please see the below syntax |
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<streamManagerConfiguration xmlns="http://wso2.org/carbon/streammanager">
<streamDefinition name="org.wso2.sample.stock.quote.basic" version="1.0.0">
<payloadData>
<property name="price" type="DOUBLE"/>
<property name="symbol" type="STRING"/>
</payloadData>
</streamDefinition>
<streamDefinition name="org.wso2.sample.twitter.feed" version="1.0.0">
<payloadData>
<property name="company" type="STRING"/>
<property name="wordCount" type="INT"/>
</payloadData>
</streamDefinition>
<streamDefinition name="org.wso2.sample.predicted.stock.quotes" version="1.0.0">
<payloadData>
<property name="company" type="STRING"/>
<property name="amount" type="DOUBLE"/>
<property name="words" type="LONG"/>
</payloadData>
</streamDefinition>
<streamDefinition name="twitterFeed" version="1.0.0">
<payloadData>
<property name="company" type="STRING"/>
<property name="wordCount" type="INT"/>
</payloadData>
</streamDefinition>
</streamManagerConfiguration> |