Complete application illustrating a XO application hosted thru RESTful API calls in Spring MVC.  Exercising a transparent and deterministic ( atomic ) Transaction Management strategy thru
the application.   Application is layered as to not muddy view, controller, services, storage, messaging, bla, bla, bla but to have it integrate well so that a holistic solution is possible to create quickly and maintain easily.

Deployed on JBoss AS7, Ehcache 2.5, Postgres 9.1, ActiveMQ 5.7:
  Check the Spring config files ( springMVC-servlet.xml, ...) for the <jee .....> tags that illustrate the names of the XA datasource you need to have created for JNDI lookup.


  Setting up your environment

Mac users may have to add an entry   127.0.0.1  <your machine name>   in your hosts file


 1.  Install Oracle JDK 1.7 64 bit
 2.  Install Jboss AS 7 latest stable build ( 7.2.0 Alpha1 in my case)
 3.  Install Postgres 9.1 AND create a schema sxo as is references in the persistent model annotations and ensure max_prepared_transactions is greater than 0 in postgresql.conf
 4. Create a Data source module in JBoss by:
     Create a postgres directory in /Applications/jboss-as-7.1.1.Final/modules/org/

     Create a module.xml file in  /Applications/jboss-as-7.1.1.Final/modules/org/postgres

                <?xml version="1.0" encoding="UTF-8"?>
				<module xmlns="urn:jboss:module:1.0" name="org.postgres">
				  <resources>
				    <resource-root path="postgresql-9.1-902.jdbc4.jar"/>
				  </resources>
				   <dependencies>
				     <module name="javax.api"/>
				     <module name="javax.transaction.api"/>
				   </dependencies>
				</module>

 Copy the XA compliant database driver into Jboss  ...... /Applications/jboss-as-7.1.1.Final/modules/org/postgres/postgresql-9.1-902.jdbc4.jar 

 Configure your specific deployment config to create a datasource .... in my case  thats /Applications/jboss-as-7.1.1.Final/standalone/configuration/standalone-full.xml
  ......... so I added the postgres config below to the existing datasource stanza
  <subsystem xmlns="urn:jboss:domain:datasources:1.0">
  
                <xa-datasource jta="true" jndi-name="java:/datasources/postgresXaDS" pool-name="postgresXaDS" enabled="true" use-java-context="true" use-ccm="true">
                    <xa-datasource-property name="serverName">
                        localhost
                    </xa-datasource-property>
                    <xa-datasource-property name="databaseName">
                        jrxopoc
                    </xa-datasource-property>
                    <xa-datasource-property name="portNumber">
                        5432
                    </xa-datasource-property>
                    <driver>postgres</driver>
                    <xa-pool>
                        <is-same-rm-override>false</is-same-rm-override>
                        <interleaving>false</interleaving>
                        <pad-xid>false</pad-xid>
                        <wrap-xa-resource>false</wrap-xa-resource>
                    </xa-pool>
                    <security>
                        <user-name>postgres</user-name>
                        <password>postgres</password>
                    </security>
                    <validation>
                        <validate-on-match>false</validate-on-match>
                        <background-validation>false</background-validation>
                    </validation>
                    <statement>
                        <share-prepared-statements>false</share-prepared-statements>
                    </statement>
                </xa-datasource>
                <drivers>
                    <driver name="postgres" module="org.postgres">
                        <xa-datasource-class>org.postgresql.xa.PGXADataSource</xa-datasource-class>
                    </driver>
                </drivers>
            </datasources>
        </subsystem>

 Install Maven 3.0.3 so that you can run a  'mvn clean install on the parent pom'  and then move the war created in the target directory to you deployment directory in Jboss AS 7 ...... in my case that's /Applications/jboss-as-7.1.1.Final/standalone/deployments


 5.  Download/Install ActiveMQ 5.7 
 6. Configure Jboss AS 7 to use  ActiveMQ as your JMS provider .....  https://community.jboss.org/thread/172319?start=30&tstart=0