Wildfly DataSource para PostgreSQL

module.xml

<!-- {wildfly_dir}\modules\system\layers\base\org\postgresql\main\module.xml -->

<!-- Na mesma pasta do module.xml é preciso adicionar o driver jdbc do PostgreSQL condizente ao nome em resource-root path -->

<!-- JAR Download: http://central.maven.org/maven2/org/postgresql/postgresql/9.4.1211/postgresql-9.4.1211.jar -->

<?xml version="1.0" encoding="UTF-8"?>
 
<module xmlns="urn:jboss:module:1.0" name="org.postgresql">
  <resources>
    <resource-root path="postgresql-9.4.1211.jar"/>
  </resources>
  <dependencies>
    <module name="javax.api"/>
	<module name="javax.transaction.api"/>
  </dependencies>
</module>

persistence.xml

<?xml version="1.0" encoding="UTF-8"?>

<persistence version="2.1" 
	xmlns="http://xmlns.jcp.org/xml/ns/persistence" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/persistence http://xmlns.jcp.org/xml/ns/persistence/persistence_2_1.xsd">
	
	<persistence-unit name="bell-adm" >
	
		<provider>org.hibernate.ejb.HibernatePersistence</provider>
		
		<!-- jta-data-source deve conter o mesmo nome definido em datasource jndi-name no arquivos standalone.xml -->
		<jta-data-source>java:/BellAdmDS</jta-data-source>
				
    <!-- Entidades -->
		<class>br.com.belladm.model.orm.Usuario</class>
		<class>br.com.belladm.model.orm.Empresa</class>

		<properties>
			<property name="hibernate.dialect" value="org.hibernate.dialect.PostgreSQLDialect"/>
			<property name="hibernate.hbm2ddl.auto" value="update"/>
			<property name="hibernate.show_sql" value="true"/>
		</properties>
	</persistence-unit>
</persistence>

standalone.xml

<!-- {wildfly_dir}\standalone\configuration\standalone.xml -->

<subsystem xmlns="urn:jboss:domain:datasources:4.0">
	<datasources>
		<datasource jndi-name="java:jboss/datasources/ExampleDS" pool-name="ExampleDS" enabled="true" use-java-context="true">
			<connection-url>jdbc:h2:mem:test;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE</connection-url>
			<driver>h2</driver>
			<security>
				<user-name>sa</user-name>
				<password>sa</password>
			</security>
		</datasource>
		<datasource jndi-name="java:/BellAdmDS" pool-name="BellAdmDS" enabled="true" use-java-context="true">
			<connection-url>jdbc:postgresql://localhost:5432/belladm</connection-url>
			<driver>org.postgresql</driver>
			<pool>
				<min-pool-size>10</min-pool-size>
				<max-pool-size>100</max-pool-size>
				<prefill>true</prefill>
			</pool>
			<security>
				<user-name>postgres</user-name>
				<password>postgres</password>
			</security>
		</datasource>
		<drivers>
			<driver name="h2" module="com.h2database.h2">
				<xa-datasource-class>org.h2.jdbcx.JdbcDataSource</xa-datasource-class>
			</driver>
			<driver name="org.postgresql" module="org.postgresql">
				<xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
			</driver>
		</drivers>
	</datasources>
</subsystem>