[jboss-jira] [JBoss JIRA] (JGRP-1937) Configuration: revert order of protocols in configuration

Configuration: revert order of protocols in configuration --------------------------------------------------------- Key: JGRP-1937 URL: https://issues.jboss.org/browse/JGRP-1937 Project: JGroups Issue Type: Feature Request Reporter: Bela Ban Assignee: Bela Ban Fix For: 4.0 Currently, a JGroups configuration lists the protocols in *bottom to top* order, e.g. {noformat} <UDP/> <PING/> ... <FRAG2/> {noformat} This is somewhat misleading as {{UDP}} is not the top protocol in the resulting stack, but the bottom protocol stack: {noformat} FRAG2 | PING | ... UDP {noformat} Therefore, it would be better to define the configuration as follows: {noformat} <FRAG2/> ... <PING/> <UDP/> {noformat} To prevent reuse of older configurations in 4.0, we could replace {{<config>}} with {{<jgroups>}}. A configuration starting with {{<config>}} would be parsed in the old style (plus a warning would be issued) and a config starting with {{<jgroups>}} would be parsed in the new style. If programmatic configuration is used, we could check which protocol is at the head of the list. If it is a transport protocol ({{UDP}} or {{TCP}}), we could dynamically revert the order and issue a warning.