Yes, it is applicable for all appservers.
ejb-jar.xml 's resource-ref has the sharing scope : default : shareable
<resource-ref>
<res-ref-name>DataSource</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
[b] <res-sharing-scope>Shareable</res-sharing-scope>[/b]
</resource-ref>
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