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).