11.2. Using the Cassandra DataStore Programmatically¶
11.2.1. Creating a Data Store¶
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("cassandra.contact.point", "127.0.0.1:9142");
parameters.put("cassandra.keyspace", "geomesa");
parameters.put("cassandra.catalog", "mycatalog");
org.geotools.data.DataStore dataStore =
org.geotools.data.DataStoreFinder.getDataStore(parameters);
11.2.2. Cassandra Data Store Parameters¶
The data store takes several parameters (required parameters are marked with *
):
Parameter | Type | Description |
---|---|---|
cassandra.catalog * |
String | The name of the GeoMesa catalog table (previously geomesa.cassandra.catalog.table ) |
cassandra.contact.point * |
String | The connection point for Cassandra, in the form <host>:<port> - for a default
local installation this will be localhost:9042 |
cassandra.keyspace * |
String | The Cassandra keyspace to use (must exist already) |
cassandra.username |
String | Cassandra user |
cassandra.password |
String | Cassandra password |
geomesa.query.audit |
Boolean | Audit queries being run. Queries will be written to a log file |
geomesa.query.timeout |
String | The max time a query will be allowed to run before being killed. The
timeout is specified as a duration, e.g. 1 minute or 60 seconds |
geomesa.query.threads |
Integer | The number of threads to use per query |
geomesa.query.loose-bounding-box |
Boolean | Use loose bounding boxes - queries will be faster but may return extraneous results |
geomesa.stats.generate |
Boolean | Toggle collection of statistics (currently not implemented) |
geomesa.query.caching |
Boolean | Toggle caching of results |
More information on using GeoTools can be found in the GeoTools user guide.