11.2. Using the Cassandra DataStore ProgrammaticallyΒΆ

An instance of a Cassandra data store can be obtained through the normal GeoTools discovery methods, assuming that the GeoMesa code is on the classpath.

Map<String, Serializable> parameters = new HashMap<>();
parameters.put("geomesa.cassandra.contact.point", "127.0.0.1:9142");
parameters.put("geomesa.cassandra.keyspace", "geomesa");
parameters.put("geomesa.cassandra.catalog.table", "mycatalog");
org.geotools.data.DataStore dataStore =
    org.geotools.data.DataStoreFinder.getDataStore(parameters);

The data store requires three parameters:

  • geomesa.cassandra.contact.point - the connection point for Cassandra, in the form <host>:<port> - for a default local installation this will be localhost:9042.
  • geomesa.cassandra.keyspace - the Cassandra keyspace to use (must exist already)
  • geomesa.cassandra.catalog.table - the name of the Cassandra table that stores feature type data

In addition, there are several optional configuration parameters:

  • geomesa.cassandra.username - Username used to connect to the Cassandra instance
  • geomesa.cassandra.password - Password used to connect to the Cassandra instance
  • auditQueries - Audit queries being run in a log file
  • caching - Cache the results of queries for faster repeated searches. Warning: large result sets can swamp memory
  • looseBoundingBox - use loose bounding boxes - queries will be faster but may return extraneous result
  • queryThreads - the number of threads to use per query
  • queryTimeout - the max time a query will be allowed to run before being killed, in seconds

More information on using GeoTools can be found in the GeoTools user guide.