Step 1: Preparing the Esper configuration

We strongly recommend reading the Esper documentation on virtual data windows first.

Creating the Factory

In your Esper configuration, you will have to add the following snippet to make the factory for creating Cassandra virtual data windows known to Esper:

#!xml
<plugin-virtualdw 
    name="cassandradw" 
    namespace="cassandra"
    factory-class="ch.uzh.ifi.ddis.ifp.esper.cassandra.CassandraVirtualDataWindowFactory" />

Parameters:

• name: the name of the virtual data window implementation. You may freely choose the value for this parameter.
• namespace: the namespace under which you will be able to access the Cassandra virtual data window implementation. You may freely choose the value for this parameter. factory-class: the actual factory to load. Note that you may replace this with a subclass of CassandraVirtualDataWindowFactory.

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Cassandra-Esper

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