“PostGIS with Hibernate Spatial and Dropwizard”
Update (Jan 16, 2013): I have created an example bootstrap application on GitHub called dropwizard-postgis-example
Today, I learned that Dropwizard allows you to setup arbitrary hibernate properties in the YAML configuration file.
Hibernate 4.x with Spatial extensions doesn’t always seem to accurately infer that it should be using the PostGIS dialect when you have PostgreSQL + PostGIS (still investigating if that should automatically happen or not.) If it does not infer that it should be using the PostGIS dialect, you can force it to do so by setting the hibernate.dialect property.
Normally you would use an XML file for the configurations but dropwizard-hibernate uses a SessionFactory and loads the configuration from a DatabaseConfiguration entity that’s deserialized from the configuration YAML. Thankfully it is smart enough to allow for arbitrary properties via the database.properties key. This is a working YAML entry for using Hibernate 4.0 with spatial extensions and Dropwizard:
Database entry for setting Hibernate’s dialect
database: # the name of your JDBC driver driverClass: org.postgresql.Driver # the username user: username # the password password: password # the JDBC URL url: jdbc:postgresql://localhost:5432/gis_database properties: hibernate.dialect: org.hibernate.spatial.dialect.postgis.PostgisDialect
You will know that it has picked the wrong dialect if you get the following output:
HHH000400: Using dialect: org.hibernate.dialect.PostgreSQLDialect
After setting the hibernate.dialect setting as above, you should see:
HHH000400: Using dialect: org.hibernate.spatial.dialect.postgis.PostgisDialect