EclipseLink on WildFly 8.2.0

WildFly application server uses Hibernate as a default JPA provider. So you can ignore specifying the persistence provider configuration in the persistence.xml file as bellow:

<?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="BidirectionalPU">
     <jta-data-source>java:jboss/datasources/Bidirectional_DataSource</jta-data-source>
     <class>com.ithinkisink.entity.Child</class>
     <class>com.ithinkisink.entity.Parent</class>
     <class>model.TempTable</class>
 </persistence-unit>
</persistence>

The deployed application will then use Hibernate as default JPA provider. In order to switch WildFly to use EclipseLink, you can follow the bellow steps:
1- Download the EclipseLink JAR file from the bellow Maven repository link:
http://mvnrepository.com/artifact/org.eclipse.persistence/eclipselink/2.6.0
2- Now navigate to the following directory under the WildFly server directory:
<PATH_TO_WILDFLY_DIRECTORY>\wildfly-8.2.0.Final\modules\system\layers\base\org\eclipse\persistence\main
3- Move the EclipseLink JAR file to the above directory and remove the version from the file name, so it would be eclipselink.jar.

4- Add the eclipselink.jar to the <resources> of the module.xml in the mentioned directory.

<module xmlns="urn:jboss:module:1.3" name="org.eclipse.persistence">
    <resources>
        <resource-root path="jipijapa-eclipselink-1.0.1.Final.jar"/>
  <resource-root path="eclipselink.jar"/>
    </resources>

    <dependencies>
        <module name="asm.asm"/>
        <module name="javax.api"/>
        <module name="javax.annotation.api"/>
        <module name="javax.enterprise.api"/>
        <module name="javax.persistence.api"/>
        <module name="javax.transaction.api"/>
        <module name="javax.validation.api"/>
        <module name="javax.xml.bind.api"/>
        <module name="org.antlr"/>
        <module name="org.apache.commons.collections"/>
        <module name="org.dom4j"/>
        <module name="org.javassist"/>
        <module name="org.jboss.as.jpa.spi"/>
        <module name="org.jboss.logging"/>
        <module name="org.jboss.vfs"/>
    </dependencies>
</module>

5- Now you can point the JPA provider to org.eclipse.persistence.jpa.PersistenceProvider.

<?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="BidirectionalPU">
     <provider>org.eclipse.persistence.jpa.PersistenceProvider</provider>
     <jta-data-source>java:jboss/datasources/Bidirectional_DataSource</jta-data-source>
     <class>com.ithinkisink.entity.Child</class>
     <class>com.ithinkisink.entity.Parent</class>
     <class>model.TempTable</class>
 </persistence-unit>
</persistence>