I tried using Forge to setup persistence using Postgres as the backend database. The command is successful. However the application still uses the ExampleDS data source and the H2 database. Persistence.xml also referring to ExampleDS only. I am wondering how to make it use the Postgres database. Please see below for what I am trying. Thank you.
 
test $ persistence setup --provider HIBERNATE --container JBOSS_AS7 --
database POSTGRES
***INFO*** Setting transaction-type="JTA"
***INFO*** Using example data source [java:jboss/datasources/ExampleDS]
? The JPA provider [HIBERNATE], also supplies extended APIs. Install these as w
ell? [y/N] Y
Install which version of [org.hibernate:hibernate-entitymanager:::]?
 
 
  1 - [org.hibernate:hibernate-entitymanager:::3.3.1.ga]*
  2 - [org.hibernate:hibernate-entitymanager:::3.3.2.Beta1]*
  3 - [org.hibernate:hibernate-entitymanager:::3.3.2.GA]*
  4 - [org.hibernate:hibernate-entitymanager:::3.4.0.CR1]*
  5 - [org.hibernate:hibernate-entitymanager:::3.4.0.CR2]*
  6 - [org.hibernate:hibernate-entitymanager:::3.4.0.GA]*
  7 - [org.hibernate:hibernate-entitymanager:::3.5.0-Beta-2]*
  8 - [org.hibernate:hibernate-entitymanager:::3.5.0-Beta-3]*
  9 - [org.hibernate:hibernate-entitymanager:::3.5.0-Beta-4]*
  10 - [org.hibernate:hibernate-entitymanager:::3.5.0-CR-1]*
  11 - [org.hibernate:hibernate-entitymanager:::3.5.0-CR-2]*
  12 - [org.hibernate:hibernate-entitymanager:::3.5.0.Beta-1]*
  13 - [org.hibernate:hibernate-entitymanager:::3.5.0-Final]*
  14 - [org.hibernate:hibernate-entitymanager:::3.5.1-Final]*
  15 - [org.hibernate:hibernate-entitymanager:::3.5.2-Final]*
  16 - [org.hibernate:hibernate-entitymanager:::3.5.3-Final]*
  17 - [org.hibernate:hibernate-entitymanager:::3.5.4-Final]*
  18 - [org.hibernate:hibernate-entitymanager:::3.5.5-Final]*
  19 - [org.hibernate:hibernate-entitymanager:::3.5.6-Final]*
  20 - [org.hibernate:hibernate-entitymanager:::3.6.0.Beta1]*
  21 - [org.hibernate:hibernate-entitymanager:::3.6.0.Beta2]*
  22 - [org.hibernate:hibernate-entitymanager:::3.6.0.Beta3]*
  23 - [org.hibernate:hibernate-entitymanager:::3.6.0.Beta4]*
  24 - [org.hibernate:hibernate-entitymanager:::3.6.0.CR1]*
  25 - [org.hibernate:hibernate-entitymanager:::3.6.0.CR2]*
  26 - [org.hibernate:hibernate-entitymanager:::3.6.0.Final]*
  27 - [org.hibernate:hibernate-entitymanager:::3.6.1.Final]*
  28 - [org.hibernate:hibernate-entitymanager:::3.6.2.Final]*
  29 - [org.hibernate:hibernate-entitymanager:::3.6.3-SNAPSHOT]*
  30 - [org.hibernate:hibernate-entitymanager:::3.6.3.Final]*
  31 - [org.hibernate:hibernate-entitymanager:::3.6.4-SNAPSHOT]*
  32 - [org.hibernate:hibernate-entitymanager:::3.6.4.Final]*
  33 - [org.hibernate:hibernate-entitymanager:::3.6.5-SNAPSHOT]*
  34 - [org.hibernate:hibernate-entitymanager:::3.6.5.Final]*
  35 - [org.hibernate:hibernate-entitymanager:::3.6.6-SNAPSHOT]*
  36 - [org.hibernate:hibernate-entitymanager:::3.6.6.Final]*
  37 - [org.hibernate:hibernate-entitymanager:::3.6.7-SNAPSHOT]*
  38 - [org.hibernate:hibernate-entitymanager:::3.6.7.Final]*
  39 - [org.hibernate:hibernate-entitymanager:::3.6.8-SNAPSHOT]*
  40 - [org.hibernate:hibernate-entitymanager:::3.6.8.Final]*
  41 - [org.hibernate:hibernate-entitymanager:::3.6.9-SNAPSHOT]*
  42 - [org.hibernate:hibernate-entitymanager:::3.6.9.Final]*
  43 - [org.hibernate:hibernate-entitymanager:::3.6.10-SNAPSHOT]*
  44 - [org.hibernate:hibernate-entitymanager:::3.6.10.Final]*
  45 - [org.hibernate:hibernate-entitymanager:::3.6.11-SNAPSHOT]*
  46 - [org.hibernate:hibernate-entitymanager:::4.0.0-SNAPSHOT]*
  47 - [org.hibernate:hibernate-entitymanager:::4.0.0.Alpha1]*
  48 - [org.hibernate:hibernate-entitymanager:::4.0.0.Alpha2]*
  49 - [org.hibernate:hibernate-entitymanager:::4.0.0.Alpha3]*
  50 - [org.hibernate:hibernate-entitymanager:::4.0.0.Beta1]*
  51 - [org.hibernate:hibernate-entitymanager:::4.0.0.Beta2]*
  52 - [org.hibernate:hibernate-entitymanager:::4.0.0.Beta3]*
  53 - [org.hibernate:hibernate-entitymanager:::4.0.0.Beta4]*
  54 - [org.hibernate:hibernate-entitymanager:::4.0.0.Beta5]*
  55 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR1]*
  56 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR2]*
  57 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR3]*
  58 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR4]*
  59 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR5]*
  60 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR6]*
  61 - [org.hibernate:hibernate-entitymanager:::4.0.0.CR7]*
  62 - [org.hibernate:hibernate-entitymanager:::4.0.0.Final]*
  63 - [org.hibernate:hibernate-entitymanager:::4.0.1-SNAPSHOT]*
  64 - [org.hibernate:hibernate-entitymanager:::4.0.1.Final]*
  65 - [org.hibernate:hibernate-entitymanager:::4.1.0-SNAPSHOT]*
  66 - [org.hibernate:hibernate-entitymanager:::4.1.0.Final]*
  67 - [org.hibernate:hibernate-entitymanager:::4.1.1-SNAPSHOT]*
  68 - [org.hibernate:hibernate-entitymanager:::4.1.1.Final]*
  69 - [org.hibernate:hibernate-entitymanager:::4.1.2]*
  70 - [org.hibernate:hibernate-entitymanager:::4.1.3-SNAPSHOT]*
  71 - [org.hibernate:hibernate-entitymanager:::4.1.3.Final]*
  72 - [org.hibernate:hibernate-entitymanager:::4.1.4-SNAPSHOT]*
 
 
? Choose an option by typing the number of the selection [*-default]  [0] 72
***SUCCESS*** Persistence (JPA) is installed.