I want to use postgresql in Jboss Wildfly Swarm via declaration of datasource. The application startup error message is:

Failed to load module for driver org.postgresq

Content of the main class:

public static void main(String[] args) throws Exception {

                Container container = new Container();      

        container.fraction(new DatasourcesFraction()

                        .jdbcDriver("postgresql", (d) -> {

          d.driverDatasourceClassName("org.postgresql.Driver");

          d.xaDatasourceClass("org.postgresql.xa.PGXADataSource");

          d.driverModuleName("org.postgresql");

                        })

        .dataSource("ExampleDS", (ds) -> {

          ds.driverName("postgresql");

          ds.connectionUrl("jdbc:postgresql://localhost:5432/test_db");

          ds.userName("sa");

          ds.password("sa");

                        })

        );

                container.start();

                JAXRSDeployment appDeployment = new JAXRSDeployment( container );

                appDeployment.addResource(MyResource.class);

                container.deploy(appDeployment);

            }

Thanks for any help