A common configuration change to the AS7 server is the addition of a subsystem. This requires adding the subsystem extension and the subsystem. This can be done with two CLI commands. Consider the JMX subsystem elements found in the standalone.xml:

<extension module="org.jboss.as.jmx"/>
   <subsystems>
...
        <subsystem xmlns="urn:jboss:domain:jmx:1.1" show-model="true">
            <jmx-connector server-binding="jmx-connector-server" registry-binding="jmx-connector-registry"/>
        </subsystem>
...
    <socket-binding-group name="standard-sockets" default-interface="public">
...
        <socket-binding name="jmx-connector-registry" port="1090" interface="management"/>
        <socket-binding name="jmx-connector-server" port="1091" interface="management"/>

These can be added via the following two CLI commands:

Note that the jmx extension must be added first in order for the add subsystem=jmx command to be recognized as having a handler.

[standalone@localhost:9999 /] /extension=org.jboss.as.jmx:add
{"outcome" => "success"}
[standalone@localhost:9999 /] /:composite(steps=[{"operation" => "add","address" => [("subsystem" => "jmx")], "show-model" => true}, {"operation" => "add-connector", "address" => [("subsystem" => "jmx")], "server-binding" => "jmx-connector-server", "registry-binding" => "jmx-connector-registry"}, {"operation" => "add", "address" => [("socket-binding-group" => "standard-sockets"), ("socket-binding" => "jmx-connector-registry")], "port" => 1090, "interface" => "management"}, {"operation" => "add", "address" => [("socket-binding-group" => "standard-sockets"), ("socket-binding" => "jmx-connector-server")], "port" => 1091, "interface" => "management"}])
{
    "outcome" => "success",
    "result" => {
        "step-1" => {"outcome" => "success"},
        "step-2" => {"outcome" => "success"},
        "step-3" => {"outcome" => "success"},
        "step-4" => {"outcome" => "success"}
    }
}

A comparision between the previous and current standalone.xml show the expected elements have been added:

[113](ironmaiden:bin) > diff ../standalone/configuration/standalone_xml_history/standalone.last.xml ../standalone/configuration/standalone_xml_history/standalone.boot.xml 
26d25
<         <extension module="org.jboss.as.jmx"/>
353,355d351
<         <subsystem xmlns="urn:jboss:domain:jmx:1.1" show-model="true">
<             <jmx-connector server-binding="jmx-connector-server" registry-binding="jmx-connector-registry"/>
<         </subsystem>
377,378d372
<         <socket-binding name="jmx-connector-registry" port="1090" interface="management"/>
<         <socket-binding name="jmx-connector-server" port="1091" interface="management"/>
380c374
< </server>
\ No newline at end of file
---
> </server>