The DDIS group at UZH released the first version of the cassandra-esper library at Maven central. The cassandra-esper library integrates Apache Cassandra via virtual data windows into the Esper complex event processing engine.

The ViSTA-TV engine can now directly query the data warehouse’s key-value store from its complex event processing part. Queries can be directly expressed as part of statements in the Esper Event Processing Language (EPL).

Further, the DDIS group also released the testng4esper library at Maven central. The testng4esper library facilitates writing TestNG tests for programs using the Esper complex event processing engine.