How to add Postgresql driver to Wildfly / JBoss Application Server
https://jdbc.postgresql.org/download/postgresql-42.2.10.jar
$ ./jboss-cli.sh
module add \
--name=org.postgresql \
--resources=~/Downloads/postgresql-42.2.10.jar \
--dependencies=javax.api,javax.transaction.api
/subsystem=datasources/jdbc-driver=postgresql:add( \
driver-name="postgresql", \
driver-module-name="org.postgresql", \
driver-class-name=org.postgresql.Driver, \
driver-xa-datasource-class-name=org.postgresql.xa.PGXADataSource
data-source add \
--name=testds \
--driver-name=postgresql \
--jta=true \
--jndi-name=java:jboss/datasources/testds \
--connection-url=jdbc:postgresql://localhost:5432/testdb \
--user-name=postgres \
--password=postgres