standalone.xml need to have gzip, here an example
<subsystem xmlns="urn:jboss:domain:undertow:3.1">
<buffer-cache name="default" />
<server name="default-server">
<http-listener name="default" socket-binding="http" redirect-socket="https" enable-http2="true" />
<https-listener name="https" socket-binding="https" security-realm="ApplicationRealm" enable-http2="true" />
<host name="default-host" alias="localhost">
<location name="/" handler="welcome-content" />
<filter-ref name="server-header" />
<filter-ref name="x-powered-by-header" />
<filter-ref name="gzipFilter"
predicate="exists['%{o,Content-Type}'] and regex[pattern='(?:application/javascript|text/css|text/html|text/xml|application/json|application/xml)(;.*)?', value=%{o,Content-Type}, full-match=true] and not min-content-size[10]" />
<filter-ref name="Vary-header" />
</host>
</server>
<servlet-container name="default">
<jsp-config />
<websockets />
</servlet-container>
<handlers>
<file name="welcome-content" path="${jboss.home.dir}/welcome-content" />
</handlers>
<filters>
<response-header name="server-header" header-name="Server" header-value="WildFly/10" />
<response-header name="x-powered-by-header" header-name="X-Powered-By" header-value="Undertow/1" />
<response-header name="Vary-header" header-name="Vary" header-value="Accept-Encoding" />
<gzip name="gzipFilter" />
</filters>
</subsystem>
system property example:
<system-properties>
<property name="openFireToken" value="xzxzx99df4d51z2d" />
<property name="openFireAddress" value="http://localhost:9090/plugins/restapi/v1" />
<property name="xmppIp" value="127.0.0.1" />
<property name="xmppPort" value="5222" />
<property name="udpRaceIp" value="127.0.0.1"/>
<property name="udpRacePort" value="9998"/>
<property name="ticketToken" value="123456789"/>
</system-properties>
datasource example:
<datasource jndi-name="java:jboss/datasources/SoapBoxDS" pool-name="SoapBoxDS" enabled="true" use-java-context="true">
<connection-url>jdbc:h2:tcp://localhost/~/git/soapbox-race-core/db/soapbox</connection-url>
<driver>h2</driver>
<security>
<user-name>sa</user-name>
<password>sa</password>
</security>
</datasource>
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